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What are the common materials for Precision Sheet Metal Fabrication?

2025-07-31

Common materials used in precision sheet metal fabrication can be divided into the following categories, each with its own unique characteristics and applications:

1. Carbon Steel and Alloy Steel

45 Steel: A medium-carbon, quenched and tempered steel with excellent overall mechanical properties, suitable for high-strength moving parts such as gears and shafts. However, attention must be paid to welding preheating and heat treatment processes.
Q235A (A3 Steel): Exceptional plasticity and weldability, widely used in structural and low-load parts such as brackets and machine bases.
40Cr: An alloy structural steel that, after quenching and tempering, offers both high strength and wear resistance. It is commonly used in medium- and high-speed transmission components such as machine tool gears and crankshafts.

2. Stainless Steel

SUS304 (0Cr18Ni9): Austenitic stainless steel with strong corrosion resistance, suitable for food equipment, medical devices, and chemical containers.
Martensitic Stainless Steel: High hardness, often used in applications requiring wear resistance, such as cutting tools and turbine blades.

3. Cast Iron and Others

HT150 Gray Cast Iron: Excellent fluidity and low cost, suitable for large castings such as gearboxes and hydraulic cylinders.
65Mn Spring Steel: Excellent elasticity, used in the manufacture of various springs and elastic components.

4. Non-ferrous Metals

Aluminum Alloy: Excellent lightweight properties, commonly used in heat sinks and electronic housings, and can be enhanced through anodizing.
Brass/Bronze: Excellent conductivity and corrosion resistance, suitable for electrical connectors and decorative parts.

Material selection requires a comprehensive consideration of strength, corrosion resistance, processing technology (such as stamping, laser cutting), and cost.

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