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AISI 4140 Alloy Steel
The Universal Multi-Purpose Alloy. Versatile medium-carbon steel for high-performance mechanical parts.
AISI 4140 Alloy Steel
AISI 4140 is a "workhorse" alloy in the metal manufacturing world. Known for its high hardenability and atmospheric corrosion resistance, it is the preferred choice for components that demand a balance of ductility and strength.
Chemical Composition | Percentage % |
|---|---|
Carbon | 0.38-0.43% |
Manganese | 0.75-1.00% |
Silicon | 0.15-0.35% |
Nickel | 0.25% max |
Chromium | 0.80-1.10% |
Molybdenum | 0.15-0.25% |
Phosphorous | 0.035% max |
Certified Quality Assurance
Every order at Progressive Metal Manufacturing is backed by rigorous quality control. We provide full material traceability with BS EN 10204 3.1 mill certificates or cast and analysis reports upon request. Our technical team is ready to assist you in selecting the right specifications to ensure your components perform reliably under the most demanding conditions.
Industrial Applications & Versatility
AISI 4140 is a cornerstone material for the oil and gas industry and heavy-duty manufacturing.
Its balanced mechanical properties make it the preferred choice for a wide range of critical components, including:
Power & Transmission: Precision gears, conveyor pins, and connection rods.
Flow Control: Stem assemblies, pump shafts, and specialized collets.
Tooling: Heavy-duty tool holders and high-tensile mechanical fasteners.
Precision Supply & Custom Specifications
We maintain a diverse stock of AISI 4140 to meet varied production scales. Beyond standard lengths,
we offer precision ground bars for applications requiring exceptionally tight tolerances and superior surface finishes.
Our facility provides custom-cut blanks and sawn-to-length pieces for both prototypes and bulk orders.
Round Bar Diameters: Available from 12mm to 650mm.
Steel Sheets: Available in thicknesses from 12mm up to 405mm.
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EN-8 (1040) Carbon Steel
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C45 (1045) Carbon Steel
AISI 4330V Alloy Steel
