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Common Alloy Steel Material Library
We maintain a complete inventory of high-quality alloy steels, including structural steel, carburizing steel, quenched & tempered steel, and tool steel, to meet the stringent requirements of diverse applications:
Low-Carbon Steel / Free-Machining Steel
1018 Steel
A general-purpose low-carbon steel with excellent weldability and machinability. Suitable for surface carburizing/quenching to achieve a hard, wear-resistant surface with a tough core. Commonly used for shafts, pins, gears, etc.
1215 Steel
A high-sulfur free-machining steel with superior chip-breaking performance, enabling high surface finish quality and faster machining speeds. Ideal for mass production of standard parts such as bolts, nuts, and bushings.
Chromium-Molybdenum Alloy Structural Steel (High-Strength)
4130 Steel
A chromium-molybdenum alloy steel with excellent strength, toughness, and weldability. A classic material for aerospace structural tubing (e.g., aircraft engine mounts) and high-performance racing chassis, typically normalized or quenched & tempered.
4140 Steel
One of the most widely used chromium-molybdenum alloy steels, offering high strength, good wear resistance, and impact toughness. Achieves different strength levels through quenching & tempering. Widely used for gears, shafts, couplings, and die sets.
4140 PH Steel (Pre-Hardened)
Supplied in a pre-quenched & tempered condition (typically HRC 28–32), offering stable mechanical properties and machinability. Can be machined directly without post-heat treatment, avoiding deformation risks. Commonly used for dies and mechanical components.
4340 Steel
A high-strength nickel-chromium-molybdenum alloy steel with exceptional strength, toughness, and fatigue resistance, especially suitable for large-section critical load-bearing components. The preferred material for aircraft landing gear, heavy-duty drive shafts, and high-performance racing crankshafts.
Tool Steel (High Wear Resistance / High Hardness)
A2 Tool Steel
An air-hardening cold-work tool steel with good wear resistance, moderate toughness, and minimal heat treatment deformation. Widely used for precision stamping dies, shear blades, and gauges.
O1 Tool Steel
An oil-hardening general-purpose tool steel renowned for excellent edge retention, machinability, and simple heat treatment. Commonly used for hand tools, gauges, cutting tools, and low-life molds.
Frequently Asked Questions
What are the primary applications of 1018 low-carbon steel?
1018 steel is commonly used for shafts, pins, gears, and components that require excellent weldability and machinability. It is suitable for surface carburizing and quenching to achieve a wear-resistant surface with a tough core.
Why should I choose 1215 steel for manufacturing parts?
1215 is a high-sulfur free-machining steel that provides superior chip-breaking performance. This enables higher surface finish quality and faster machining speeds, making it ideal for the mass production of standard parts like bolts, nuts, and bushings.
What is the advantage of using 4140 PH (Pre-Hardened) steel?
4140 PH steel is supplied pre-quenched and tempered (typically HRC 28-32). This allows it to be machined directly without post-heat treatment, which saves processing time and completely avoids the risks of deformation associated with heat treatment.
When is 4340 steel preferred over other structural steels?
4340 steel is preferred for large-section, critical load-bearing components that require exceptional strength, toughness, and fatigue resistance. Typical applications include aircraft landing gear, heavy-duty drive shafts, and high-performance racing crankshafts.
What is the difference between A2 and O1 tool steels?
A2 is an air-hardening cold-work tool steel that features good wear resistance and minimal heat treatment deformation, making it suitable for precision stamping dies. O1 is an oil-hardening steel known for excellent edge retention and simple heat treatment, commonly used for hand tools and low-life molds.
Finishes and Post-Processing Options
The zinc alloy substrate is highly suitable for various surface treatments to enhance decoration, protection, or functionality:
Electroplating: Such as chrome, nickel, gold, or silver plating, providing a highly decorative appearance, excellent wear and corrosion resistance. This is the most common choice.
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Passivation or Chromate Conversion Coating:
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Powder Coating:
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Painting:
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Physical Vapor Deposition (PVD):
Design and Machining Considerations
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Process Selection:
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Design Considerations:
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Material Selection:
Zamak 3 and 5 are suitable for the vast majority of general-purpose parts requiring good appearance and strength; ZA-8 is better for wear and bearing applications; for making rapid tooling, choose specialized alloys like Kirksite.
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