Sheet Metal Parts: How Much Do They Cost, What Materials Are Used, and How Do You Prototype, Bend, and Cut Them Correctly?

How Much to Get a Metal Part Made: Real Cost Breakdowns by Process

The cost to get a metal part made is determined by five variables: raw material cost, machine setup time, machining or fabrication time, finishing operations, and quantity. Understanding how each variable contributes helps you negotiate quotes, design for cost reduction, and decide when to prototype in-house versus outsourcing.

Cost by Fabrication Process

Different sheet metal processes carry very different cost structures. Laser cutting has low setup cost but charges by cutting time and material. Press brake bending charges by setup and number of bends. Stamping has very high tooling cost but extremely low per-part cost at volume.

Material Cost as a Percentage of Total Part Cost

Raw material typically represents 20 to 40% of total part cost for low-volume sheet metal fabrication, with labor and machine time making up the remainder. At high volumes, material cost rises to 50 to 70% of total cost as setup and programming overhead is amortized across more parts. Approximate raw material costs per pound in 2024:

• Cold-rolled steel: $0.50 to $0.90 per pound
• Hot-rolled steel: $0.40 to $0.75 per pound
• Galvanized steel: $0.55 to $1.00 per pound
• Aluminum 5052: $1.50 to $2.50 per pound
• Stainless steel 304: $2.00 to $3.50 per pound
• Copper C110: $3.50 to $5.50 per pound

Design Choices That Reduce Cost Significantly

The single highest-impact cost reduction action is designing parts to minimize the number of operations. Each additional operation (extra bend, secondary machining step, weld, surface finish) adds setup time and labor. Specific design-for-cost practices:

• Minimize unique bend angles: Using a consistent bend radius equal to the material thickness throughout a part allows the fabricator to use one tool setup for all bends, reducing press brake setup time by 50% or more.
• Avoid tight tolerances where not needed: Holding a feature to ±0.005 inch instead of ±0.030 inch can triple inspection time and require additional machining passes. Only specify tight tolerances on dimensions that functionally require them.
• Use standard sheet thicknesses: Ordering a non-standard gauge requires custom material ordering with minimum order quantities. Standard gauges (16, 14, 12, 11, 10 gauge for steel; 0.040, 0.063, 0.080, 0.125 inch for aluminum) are stocked by nearly all service centers.
• Consolidate parts into one piece where possible: A single bent bracket replacing a welded two-piece assembly eliminates weld labor, fixturing, and post-weld grinding, often reducing cost by 30 to 50%.

Online Quoting Platforms vs. Local Fabricators

Online sheet metal fabrication platforms such as Xometry, Protolabs, SendCutSend, and OSH Cut have made instant quoting and fast turnaround available for standard flat-cut and bent parts. For a simple laser-cut flat blank in 14-gauge cold-rolled steel measuring 6 x 10 inches, expect online quotes in the range of $8 to $25 per part at quantities of 10. Lead times on these platforms typically run 3 to 10 business days. Local fabricators often offer better pricing on complex assemblies, can provide engineering input on DFM (design for manufacturability), and are preferred when tight tolerances or custom finishing are required.

What Are Common Sheet Metals? Properties and Applications of Each

The most common sheet metals used in fabrication are cold-rolled steel, hot-rolled steel, galvanized steel, aluminum (alloys 1100, 3003, 5052, and 6061), stainless steel (grades 304 and 316), copper, and zinc. Each material has a distinct set of mechanical properties, formability characteristics, and corrosion behavior that determines the right application.

Steel: The Foundation of Sheet Metal Fabrication

Steel remains the most widely used sheet metal material globally due to its combination of strength, weldability, and low cost. The three primary forms used in sheet metal work are:

• Cold-rolled steel (CRS): Produced by rolling steel at room temperature below its recrystallization point. This process increases tensile strength (typically 50,000 to 80,000 psi), improves surface finish, and tightens dimensional tolerances compared to hot-rolled steel. CRS is the standard choice for enclosures, brackets, chassis parts, and any application requiring a painted or powder-coated finish. It rusts if left uncoated.
• Hot-rolled steel (HRS): Rolled at temperatures above 1,700°F (927°C), producing a rougher surface with a characteristic blue-gray mill scale. HRS is less dimensionally precise than CRS but is less expensive and well-suited for structural applications such as frames, supports, and weldments where surface appearance is not critical.
• Galvanized steel: Cold-rolled steel coated with a layer of zinc (typically 0.6 to 2.5 oz per square foot) by hot-dip or electrogalvanizing. The zinc coating provides sacrificial cathodic protection, meaning it corrodes preferentially to protect the steel substrate. Galvanized steel is standard for HVAC ductwork, roofing panels, agricultural buildings, and outdoor enclosures. Welding galvanized steel produces toxic zinc oxide fumes requiring proper ventilation.

Aluminum: Lightweight and Corrosion Resistant

Aluminum sheet is the second most common material in fabrication, valued for its low density (0.098 lb/in³ vs. 0.284 lb/in³ for steel), natural corrosion resistance, and excellent conductivity. The most used alloys in sheet form:

• Alloy 3003: The most formable common aluminum alloy. Low strength (tensile strength approximately 17,000 psi) but excellent for deep drawing, spinning, and complex bends. Used for cookware, fuel tanks, and decorative trim.
• Alloy 5052: The standard choice for sheet metal fabrication requiring both good formability and moderate strength (tensile strength approximately 28,000 to 38,000 psi). Excellent corrosion resistance in marine environments. Used for electronic enclosures, marine components, fuel tanks, and architectural panels.
• Alloy 6061-T6: A heat-treated structural aluminum with tensile strength of approximately 45,000 psi. Less formable than 5052 (minimum bend radius is larger) but significantly stronger. Used for structural brackets, aerospace components, and machined parts.
• Alloy 1100: Nearly pure aluminum (99%+), extremely soft and formable. Used for chemical processing equipment, fin stock, and applications requiring maximum corrosion resistance with minimal strength requirements.

Stainless Steel: Corrosion Resistance at Higher Cost

Stainless steel contains a minimum of 10.5% chromium, which forms a passive chromium oxide layer on the surface that self-repairs in the presence of oxygen, providing corrosion resistance without additional coating. The two most common grades in sheet form:

• Grade 304 (18-8 stainless): Contains 18% chromium and 8% nickel. The most widely used stainless steel for kitchen equipment, food processing, medical devices, architectural panels, and general fabrication. Tensile strength approximately 73,000 to 90,000 psi. Work hardens rapidly during forming, requiring larger bend radii and higher press brake tonnage than carbon steel of the same gauge.
• Grade 316: Adds 2 to 3% molybdenum to the 304 composition, providing superior resistance to chloride pitting and crevice corrosion. Required for marine applications, chemical processing, and coastal architectural work where 304 would suffer pitting from saltwater or industrial chemicals.

Copper and Zinc: Specialty Sheet Metals

Copper sheet (alloy C110, electrolytic tough pitch) is used in electrical bus bars, roofing, flashing, heat exchangers, and decorative architectural applications. It has excellent electrical conductivity (100% IACS), formability, and solderability, but costs significantly more than steel or aluminum. Zinc sheet (typically alloy Z1 or VMZINC) is used in European-style standing seam roofing and facade cladding, developing a protective patina over time. Both materials require care to avoid galvanic corrosion when in contact with other metals in wet environments.

What Are the Components of a Metal? Understanding Alloy Composition and Its Effect on Fabrication

The components of a metal in an engineering context refers to its elemental composition, the alloying elements added to pure base metals to achieve specific mechanical, thermal, or corrosion-resistance properties. Understanding what each alloying element does helps you select the right material and anticipate how it will behave during cutting, bending, welding, and finishing.

Key Alloying Elements in Steel and Their Effects

• Carbon (C): The primary strengthening element in steel. Increasing carbon content raises hardness and tensile strength but reduces ductility and weldability. Low-carbon steel (less than 0.30% C) is used for sheet metal fabrication because it remains formable and weldable. High-carbon steels (above 0.60% C) are too brittle for bending operations.
• Manganese (Mn): Improves hardenability, tensile strength, and wear resistance. Also acts as a deoxidizer during steelmaking, removing oxygen from the melt. Present at 0.25 to 1.65% in most carbon steel sheet grades.
• Silicon (Si): Acts as a deoxidizer and improves strength without significantly reducing ductility. Present at 0.10 to 0.35% in most structural steels.
• Chromium (Cr): At concentrations above 10.5%, chromium creates the passive oxide layer that makes stainless steel corrosion resistant. In alloy steels, chromium improves hardenability and wear resistance.
• Nickel (Ni): In stainless steels (notably 304 and 316), nickel stabilizes the austenitic crystal structure, improving ductility, toughness, and formability at low temperatures. Grade 304 contains 8 to 10.5% nickel.
• Molybdenum (Mo): Added to grade 316 stainless steel at 2 to 3% to improve resistance to chloride pitting. Also used in tool steels to improve high-temperature strength.

Key Alloying Elements in Aluminum Sheet

Aluminum alloys are classified by a four-digit system where the first digit identifies the primary alloying element:

• 1xxx series (pure aluminum): Over 99% aluminum. Maximum corrosion resistance and conductivity. Minimum strength. Alloy 1100 is the standard.
• 3xxx series (manganese alloys): Manganese as primary alloying element at 0.5 to 1.5%. Moderate strength, excellent formability. Alloy 3003 is the most common in this series.
• 5xxx series (magnesium alloys): Magnesium at 0.5 to 5% provides the best combination of strength, corrosion resistance, and formability without heat treatment. Alloy 5052 (2.5% Mg) is the fabrication standard.
• 6xxx series (magnesium and silicon alloys): Heat-treatable alloys. Alloy 6061 contains 0.8 to 1.2% Mg and 0.4 to 0.8% Si, achieving tensile strengths up to 45,000 psi in T6 temper. More difficult to form than 5052 due to higher strength.

How Composition Affects Sheet Metal Fabrication Operations

The alloy composition directly governs practical fabrication parameters that every operator and designer must account for:

• Minimum bend radius: Softer alloys (1100 aluminum, 3003) can be bent to a radius of 0 times the material thickness (0T) without cracking. Stronger alloys like 6061-T6 require a minimum bend radius of 3T to 6T. Exceeding the minimum radius causes cracking at the outside of the bend.
• Springback: Higher-strength alloys exhibit greater elastic springback after bending, requiring the press brake to overbend by a calculated angle to achieve the final geometry. Stainless steel springback is typically 2 to 5 degrees greater than equivalent carbon steel.
• Laser cutting parameters: Higher alloy content changes the laser cutting speed and assist gas requirements. Stainless steel is cut with nitrogen (no oxidation) at speeds 30 to 50% slower than carbon steel of the same thickness. Highly reflective copper and aluminum require fiber lasers rather than CO2 lasers to avoid reflection damage.
• Weldability: Alloys with high sulfur or phosphorus content (free-machining steels) weld poorly. Aluminum alloys 2xxx and 7xxx series are difficult or impossible to weld without cracking. The most weldable common sheet metals are low-carbon steel, 304 stainless, and aluminum 5052.

Sheet Metal Prototyping: Processes, Turnaround, and Best Practices

Sheet metal prototyping is the process of producing one to a few functional parts from sheet metal to validate a design before committing to production tooling or volume orders. Effective prototyping catches design errors early when changes are inexpensive, proves out fit and function in the actual assembly context, and generates the part drawings and specifications needed for production quoting.

Choosing the Right Prototyping Process

The dominant sheet metal prototyping process is laser cutting combined with press brake bending. A flat pattern is cut from sheet using a fiber or CO2 laser, then bent on a CNC press brake to the final geometry. This combination can produce a first prototype in as little as 24 to 72 hours from a DXF flat pattern file. Compared to stamping, it requires no hard tooling, so design changes are made in software and a new laser program is run within minutes rather than weeks.

For prototyping parts with complex curved forms or deep-drawn geometries, hydroforming or brake-formed approximations are used until production deep-draw tooling is justified. For parts requiring holes, slots, and louvers, CNC turret punch presses offer fast cycle times and low per-part tooling cost using standard punch shapes from the machine's tool library.

What Files You Need to Supply to a Sheet Metal Prototyping Shop

Providing clear, complete documentation reduces quote time, prevents errors, and speeds delivery. Most sheet metal prototyping shops need:

1. 3D CAD file (STEP or IGES format): The 3D model allows the shop to verify geometry, unfold the flat pattern, and program the bending sequence. Most shops can also accept SolidWorks (.sldprt) or Inventor (.ipt) native files.
2. 2D drawing (PDF or DWG) with tolerances: Specifies critical dimensions, tolerances, material, finish, and any special notes such as grain direction requirements or edge break specifications.
3. Flat pattern DXF file (optional but helpful): If you have already unfolded the part in CAD, supplying the DXF flat pattern with K-factor annotation speeds programming. However, most shops prefer to unfold the part themselves to apply their own K-factors based on their specific press brake tooling.
4. Material specification: Grade, temper, thickness, and surface condition (mill finish, brushed, pre-painted). For stainless steel, also specify grain direction if grain appearance matters.

Sheet Metal Prototyping: Common Design Errors That Delay Delivery

• Bend-to-hole distance too small: Holes placed closer than 1.5 times the material thickness from a bend line will distort during bending as the material flows. Move holes away from bend lines or add a formed lance instead.
• Minimum flange length not respected: The minimum straight flange length that can be bent on a standard press brake is approximately 4 times the material thickness. Shorter flanges cannot be gripped by the die and require expensive special tooling.
• Inconsistent bend radii: Specifying different bend radii on the same part requires tool changes between bends, increasing setup time and cost. Standardize to one radius equal to the material thickness throughout.
• Wall thickness not appropriate for the material: Specifying 22-gauge (0.030 inch) steel for a part that will carry structural load, or specifying 10-gauge (0.135 inch) for a simple cover that only needs 18-gauge (0.048 inch), both lead to either failure or unnecessary weight and cost.

Typical Turnaround Times for Sheet Metal Prototyping

Sheet Metal Bending Tools: Every Option from Hand Tools to CNC Press Brakes

Sheet metal bending tools range from simple hand-operated brakes that cost under $100 to CNC press brakes with multi-axis back gauges costing over $500,000. Choosing the right bending tool depends on material thickness, bend length, required accuracy, production volume, and available budget.

Hand Brake (Box and Pan Brake)

A hand brake is a manually operated bending tool with a clamping beam that holds the sheet while a hinged apron bends the material upward. Box and pan brakes have segmented upper jaws (fingers) that can be rearranged to bend flanges on boxes and pans where a solid beam would interfere with the part. Hand brakes are available in bending lengths from 12 inches to 10 feet and are typically limited to material thicknesses of 18 gauge (0.048 inch) steel or 0.063 inch aluminum for practical bending by one person. Cost range: $100 to $3,000 depending on length and build quality.

Cornice Brake

A cornice brake is similar to a hand brake but uses a solid clamping beam across the full bending length. It excels at making long, straight bends in sheet metal but cannot form boxes or pans with closed sides because the beam blocks the second flange. Cornice brakes are the standard tool in HVAC duct shops and roofing fabrication for bending long panels, Z-bars, and hat channels. They can typically handle material up to 16 gauge (0.060 inch) steel at lengths up to 12 feet.

Press Brake

A press brake uses a punch (upper tool) and die (lower tool) to bend sheet metal through a V-groove. Three primary bending modes are used:

• Air bending: The punch presses the sheet into the die opening without bottoming out. The final angle is controlled by the punch depth, and springback is compensated by overbending. Air bending requires the least tonnage and is the most flexible mode since one die opening can produce multiple angles. Accuracy of ±0.5 to ±1 degree is typical.
• Bottoming: The punch forces the sheet to contact the full die surface, nearly eliminating springback. Requires 3 to 5 times more tonnage than air bending but produces more consistent angles across a production run. Accuracy of ±0.25 degree is achievable.
• Coining: The highest-tonnage mode, where the punch embosses the material into the die with enough force to cold-work the metal at the bend zone. Virtually eliminates springback and produces the most accurate, consistent bends. Requires 5 to 30 times more tonnage than air bending. Used for precision parts in aerospace and defense.

Press brake tonnage requirements follow a basic formula: tonnage per foot of bend = (material tensile strength × thickness² × 1.33) / die opening width. For 14-gauge (0.075 inch) cold-rolled steel air-bent in a 0.5-inch die opening, this yields approximately 5 to 7 tons per linear foot. A 10-foot CNC press brake with 88 to 110 tons of capacity can handle the majority of sheet metal work up to 10-gauge (0.135 inch) thickness.

CNC Press Brake with Back Gauge

CNC press brakes add computer-controlled back gauges that position the sheet precisely for each bend, automatic angle measurement through laser or contact sensors, and programmable bend sequences that guide the operator through each step. A CNC press brake with a 4-axis back gauge can hold bend angle accuracy of ±0.1 degree and flange length accuracy of ±0.004 inch (0.1 mm). For production sheet metal parts, CNC press brakes reduce setup time to 10 to 30 minutes for a multi-bend part and virtually eliminate operator skill variability in the final angle.

Roll Bending and Slip Roll Machines

Slip rolls and plate rolls bend sheet metal into cylinders, cones, and curved forms using three rollers. A 3-roll slip roll uses two parallel lower rolls and one adjustable upper roll to feed and curve the sheet. Slip rolls are the tool of choice for making round duct sections, tank shells, curved architectural panels, and cylindrical enclosures. Manual slip rolls are rated for material thicknesses from 22 gauge through 10 gauge depending on roll diameter and machine frame strength. Minimum bend diameter achievable is approximately 3 to 4 times the roll diameter.

Sheet Metal Bending Tools at a Glance

How to Cut Metal Roofing Panels: Tools, Techniques, and Safety

Cutting metal roofing panels correctly requires the right tool for the cut type (length cuts along ribs versus crosscuts across the panel width), the panel profile (standing seam, corrugated, exposed fastener), and the material (galvanized steel, aluminum, or Galvalume). The most important rule: never use an angle grinder with an abrasive disc on metal roofing panels. The heat generated leaves iron particles embedded in the coating that rust immediately, voiding warranties and creating staining that spreads across the entire roof surface.

Best Tools for Cutting Metal Roofing Panels

• Tin snips (aviation snips): The correct tool for short cuts, notches, and trimming. Left-cut snips (red handles) curve left; right-cut snips (green handles) curve right; straight-cut snips (yellow handles) cut in a straight line. Tin snips work well on sheet up to 26 to 22 gauge but are tiring for long cuts over 24 inches (61 cm).
• Electric nibbler: The best tool for long cuts on corrugated and standing seam panels. A nibbler removes a small channel of material using a punch-and-die action, producing a clean cut with no heat and no burr. Nibblers cut curved and straight lines equally well and can cut material up to 18 gauge steel or 0.125 inch aluminum depending on model. Cost range: $50 to $400 for electric models.
• Electric shear: A shear uses two blades in an offset configuration to slice through sheet metal cleanly. Panel shears designed for roofing panels follow the profile of corrugated or rib panels. Shears leave a cleaner edge than nibblers but are less flexible for curved cuts. Suitable for material up to 18 gauge (0.048 inch).
• Circular saw with a metal-cutting blade: A circular saw fitted with a carbide-tipped metal-cutting blade or a fine-tooth ferrous metal blade (36 to 60 TPI) makes fast, straight crosscuts across panel ribs. The saw is run in reverse direction (blade rotation opposite to standard) on some roofing panel manufacturers' recommendations to reduce burr and panel movement. Always use a straightedge guide. Generates metal swarf that must be swept off the panels immediately after cutting.
• Angle grinder with a cut-off disc: Acceptable only for stainless steel flashing and heavy structural trim, not for coated roofing panels. The heat generated oxidizes the zinc coating and embeds iron particles that cause rust staining. If used at all on roofing work, clean all metal particles from the roof surface within minutes of cutting and treat cut edges with zinc-rich cold galvanizing compound.

Step-by-Step Process for Cutting Metal Roofing Panels on the Job

1. Measure and mark the cut line on the panel using a chalk line or a permanent marker. For crosscuts, mark across multiple ribs with a speed square to ensure the line is perpendicular to the panel edge.
2. Secure the panel on a flat, stable surface. A pair of sawhorses with a sheet of plywood bridging them provides a stable cutting surface. Panels that flex during cutting produce wavy or inaccurate cuts.
3. Select the correct tool for the cut: nibbler or shear for rip cuts along the panel length, circular saw or snips for crosscuts.
4. Wear full PPE: Safety glasses (metal particles travel at high speed), cut-resistant gloves (fresh-cut sheet metal edges are razor-sharp), hearing protection (metal cutting is loud), and a dust mask if working in an enclosed space.
5. Make the cut at a steady, consistent pace. On a circular saw, feed rate should produce continuous cutting without the blade bogging down. On a nibbler, maintain contact pressure without forcing.
6. Immediately sweep all metal swarf and filings off the cut panels and surrounding roof surfaces using a soft-bristle brush. Metal particles left on coated panels cause surface rust staining within hours in humid conditions.
7. Deburr cut edges with a deburring tool or fine metal file. Sharp cut edges can damage roofing underlayment and create injury hazards during installation.

Cutting Different Metal Roofing Panel Types

Frequently Asked Questions

1. How much does it cost to get a metal part made?

Getting a metal part made professionally costs $50 to $500 or more per part at prototype quantities, depending on material, process, complexity, and size. A simple laser-cut flat bracket in cold-rolled steel at quantities of 10 costs approximately $8 to $30 per part from online services. A complex bent and welded enclosure in stainless steel at prototype quantity can cost $300 to $800 per unit. Costs drop significantly at production quantities: a part costing $50 at 5 pieces may cost $5 to $8 at 500 pieces due to amortized setup costs.

2. What are common sheet metals used in fabrication?

The most common sheet metals are cold-rolled steel, hot-rolled steel, galvanized steel, aluminum alloys 3003, 5052, and 6061, stainless steel grades 304 and 316, copper C110, and zinc. Cold-rolled steel is the most widely used material for general fabrication due to its low cost and good formability. Aluminum 5052 is the standard for enclosures and panels where weight and corrosion resistance matter. Stainless 304 is used for food, medical, and architectural applications requiring both strength and corrosion resistance.

3. What are the components of a metal alloy?

A metal alloy consists of a base metal (such as iron in steel, or aluminum) combined with one or more alloying elements added in specific proportions to achieve desired properties. In steel, the key components are iron (primary), carbon (strengthening, typically less than 0.30% for sheet steel), manganese (hardenability), silicon (deoxidizer), and in stainless steel, chromium (above 10.5% for corrosion resistance) and nickel (ductility and toughness). In aluminum alloys, the base is aluminum combined with elements like magnesium (5xxx series), manganese (3xxx series), or magnesium and silicon (6xxx series heat-treatable alloys).

4. What files do I need to provide for sheet metal prototyping?

For sheet metal prototyping, provide a 3D CAD file in STEP or IGES format (so the shop can unfold the flat pattern and program bending), a 2D drawing in PDF or DWG with all critical dimensions, tolerances, material specification, and finish notes, and a flat pattern DXF file if available. Specify the material grade, temper, and thickness explicitly. Ambiguous specifications (such as "stainless steel" without a grade) will cause delays while the shop requests clarification.

5. What sheet metal bending tools do I need for a small shop?

For a small fabrication shop or serious hobbyist working with sheet metal up to 16 gauge, the core toolkit includes a box and pan hand brake (for flanges and boxes), a set of aviation snips (left, right, and straight), a manual slip roll (for cylinders and curves), and a hand seamer (for tightening and dressing bends). A budget press brake or hydraulic press with a bend tooling set extends capability to heavier gauges. Total startup cost for this basic capability runs $500 to $3,000 for manual tools.

6. How do I cut metal roofing panels without causing rust?

Use a nibbler, electric shear, or circular saw with a carbide metal-cutting blade. Never use an abrasive angle grinder disc on coated metal roofing panels, as the heat embeds iron particles in the coating that rust immediately. After every cut, sweep all metal swarf off the panel surface and adjacent roof areas with a soft brush before the particles oxidize. Deburr cut edges and treat them with zinc-rich cold galvanizing compound to prevent edge corrosion on galvanized or Galvalume panels.

7. What is the difference between air bending and bottoming on a press brake?

In air bending, the punch presses the sheet into the die opening without full contact with the die surface. The angle is controlled by punch depth, and springback is compensated by overbending. Air bending requires the least tonnage and allows one die to produce multiple angles. In bottoming, the punch drives the sheet fully against the die sidewalls, nearly eliminating springback and producing more consistent angles. Bottoming requires 3 to 5 times more tonnage than air bending. Most modern CNC press brake work uses air bending with angle correction feedback for efficiency.

8. Why is aluminum 5052 the most common alloy for sheet metal parts?

Aluminum 5052 is the standard fabrication alloy because it provides the best balance of formability, strength, corrosion resistance, and weldability among the aluminum sheet alloys. Its tensile strength of 28,000 to 38,000 psi is adequate for most structural bracket and enclosure applications, its minimum bend radius allows tight bends without cracking, its 2.5% magnesium content gives excellent marine corrosion resistance, and it welds cleanly without cracking. Higher-strength alloys like 6061-T6 are harder to bend and more expensive to form.

9. What is the minimum flange length for press brake bending?

The minimum straight flange length that a standard press brake can bend is approximately 4 times the material thickness using standard tooling. For 14-gauge (0.075 inch) steel, this means flanges shorter than approximately 0.30 inch (7.6 mm) cannot be bent without special narrow tooling. Designs that require very short flanges add tooling cost and setup time. Increasing minimum flange length to 6 to 8 times the material thickness in your design specifications gives fabricators more flexibility with standard tools.

10. When does it make sense to use stamping instead of laser cutting for sheet metal parts?

Progressive die stamping becomes cost-effective when production volumes exceed approximately 5,000 to 25,000 parts per year (depending on part size and die cost). Stamping tooling costs range from $5,000 to $50,000 or more, but once amortized, per-part costs drop to $0.10 to $5.00, far below what laser cutting can achieve. Stamping also enables forming operations (draws, embosses, lances) in a single die stroke that would require multiple operations on a laser and press brake. For prototype and low-volume work, laser cutting and press brake bending is always more economical than stamping.