Stamping Materials
The alloys ISTAMPING stamps every day - from high-conductivity copper and fatigue-proof phosphor bronze to stainless steel, aluminum and galvanized strip - and what each one is best at.
Brass Materials
Brass is a copper-zinc alloy prized for its corrosion resistance, electrical conductivity, machinability and attractive gold-like appearance. In metal stamping, brass alloys deliver excellent formability and springback control, making them a first-choice material for precision stamped components across electrical, plumbing, automotive and consumer applications.
Copper Part Stamping
Copper offers the highest electrical and thermal conductivity of any commercial metal (up to 100% IACS), which is why stamped copper parts are essential in electrical systems, power distribution, EV battery interconnects and heat management applications. Pure copper and high-copper alloys combine conductivity with good ductility for precision stamping.
Phosphor Bronze Materials
Phosphor bronze is a copper-tin-phosphorus alloy known for its exceptional spring properties, fatigue resistance and corrosion resistance. These characteristics make phosphor bronze stamping the preferred choice for components that must maintain contact force and electrical performance over millions of cycles.
Stainless Steel Materials
Stainless steel combines corrosion resistance, hygiene and strength, which is why stainless metal stamping is the default choice for spring contacts, EMI shields, housings and medical components that must survive demanding environments without finishing. Each grade serves a different job: SUS301 work-hardens into a high-elasticity spring material, SUS304 is the general-purpose structural grade, SUS316L handles medical and aggressive-corrosion duty, and SUS430 adds magnetic response at lower cost.
Aluminum Materials
Aluminum is roughly one-third the density of steel while still conducting heat and electricity well, so aluminum metal stamping shows up wherever weight, thermal management or a corrosion-resistant exterior matters - heat sinks, battery busbar supports, brackets, housings and clips for electronics and EV programs. Soft, dead-soft grades such as A1050 and A1060 press into deep thermal parts; A5052 adds magnesium for bendability and strength; A6061 handles structural duty; high-strength 7075-T6 aircraft aluminum is reserved for minimal-form blanks, shims and bracket plates where yield strength matters more than deep drawing.
High-Conductivity Copper Alloys
High-performance copper alloys solve the classic connector trade-off: pure copper conducts but is soft, spring alloys are strong but lossy. Copper-nickel-silicon grades such as C70250 (Corson type) hold roughly 45-60% IACS at 600-800 MPa, covering most high-current terminal, busbar and micro-pin duties. Where mechanical duty outweighs conductivity, copper-nickel-tin C72900 and titanium copper C19900 push strength and wear resistance further still, the same family of solutions used instead of beryllium copper, and they keep their spring force through soldering heat and millions of flex cycles.
Galvanized Steel Materials
Galvanized steel pairs the strength and low cost of carbon steel with a sacrificial zinc coating, making galvanized steel stamping the workhorse for brackets, structural parts, electrical enclosures and shield components that need corrosion protection without the price of stainless. Electro-galvanized SECC offers a thin, smooth, weld-friendly zinc layer for formed and painted parts, while hot-dip SGCC carries a thicker coating for longer service life in harsher environments; bare SPCC cold-rolled fills the budget tier ahead of plating or painting.
Pre-Plated & Plated Strip
Pre-plated strip arrives at the press with the finish already on the coil - tin, nickel, or selectively plated gold and silver zones - so the stamped part needs no post-stamp barrel or rack plating. That matters for three reasons: contact resistance is set by the strip supplier under controlled thickness and adhesion, cut edges inherit a plated surface instead of bare base metal, and the lead time that rack plating would add to every lot disappears from the schedule. In connector and terminal work, pre-plated strip is usually the difference between a part that assembles cleanly and one that oxidizes in storage.
Clad Metals & Bimetal Strip
Clad metals bond two or more metals into a single strip so the part gets properties no single alloy can deliver: copper conductivity on the working face with aluminum weight and cost in the body, or silver at the contact point over a copper conductor that carries the load. Stamped clad strip is the standard answer where a solid silver part would be uneconomic and an aluminum part would fail electrically - battery interconnects, transition joints, high-current contact faces and thermal spreaders that must not set up a galvanic couple at the interface.
Beryllium Copper Materials
Beryllium copper C17200 is the reference alloy when a stamped part has to carry current and hold a spring force at the same time - battery and charging contacts, EMI grounding fingers, relay springs and connector terminals that must survive millions of mating cycles without relaxing. C17200 reaches roughly 1100-1300 MPa in the aged temper, several times the strength of pure copper, while still conducting 22-28% IACS, and it keeps that spring force through solder reflow and thermal cycling where phosphor bronze softens and pure copper simply yields.
Cold-Rolled Steel Materials
Cold-rolled steel SPCC is the commodity tier of stamped metal: consistent thickness, uniform surface, predictable forming behavior and the lowest cost per part of any material we run. It is the default for brackets, chassis parts, shields, motor laminations and enclosures where the service environment is dry or protected, and where every tenth of a cent per part shows up in the program economics. The trade-off is corrosion - cold-rolled steel has no sacrificial coating of its own, so any exposed part either gets a finish after stamping or steps up to SECC/SGCC galvanized strip.
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