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Product Overview
Introduction To Engineering Steel 4130 / AISI 4130 Steel
MOKSH TUBES & FITTINGS LLP is a reliable supplier, exporter, importer, and stockist of EN 4130 steel products including pipes, tubes, bars, plates, and fittings.
4130 Alloy Steel, also known as AISI 4130, Chromium-Molybdenum Steel, or Cr-Mo Steel, is a versatile low-alloy steel known for its high strength, toughness, weldability, and fatigue resistance. Its excellent strength-to-weight ratio makes it ideal for aerospace structures, motorsport frames, high-pressure tubing, and critical engineering components.
Whether used in aircraft parts, roll cages, drill pipes, or high-stress mechanical components, 4130 alloy steel delivers consistent performance under load and offers exceptional durability after heat treatment. Its combination of strength, workability, and reliability makes it a preferred choice for OEMs, engineering companies, fabrication units, and industrial manufacturers.
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4340 Alloy Steel Specifications
| Category | Details |
|---|---|
| Grade | AISI 4340 / UNS G43400 / EN 24 / 1.6511 |
| Type | High-Strength Low Alloy Steel (Ni-Cr-Mo Alloy) |
| Typical Chemical Composition | C 0.38–0.43%, Mn 0.60–0.80%, Si 0.15–0.30%, Cr 0.70–0.90%, Ni 1.65–2.00%, Mo 0.20–0.30% |
| Conditions | Annealed, Normalized, Hardened & Tempered, Hot Rolled, Forged |
| Heat Treatment | Quenching & Tempering, Normalizing, Stress Relieving |
| Testing | Tensile, Hardness, Impact, Chemical Analysis, UT (Optional) |
| Certification | EN 10204 3.1 / 3.2 (Mill Test Certificate Available) |
Chemical Composition of 4130 Alloy Steel
| Element | Composition (%) |
|---|---|
| Carbon | 0.28 – 0.33 |
| Manganese | 0.40 – 0.60 |
| Phosphorus | 0.035 |
| Sulfur | 0.040 |
| Chromium | 0.80 – 1.10 |
| Molybdenum | 0.15 – 0.25 |
| Silicon | 0.15 – 0.35 |
Mechanical Properties
| Property | Annealed | Hot-Finished | Cold Drawn | Hot-rolled | Sheet |
|---|---|---|---|---|---|
| Tensile Strength (ksi / MPa) | 85–105 ksi / 586–724 MPa | 90–115 ksi / 620–793 MPa | 95–130 ksi / 655–896 MPa | 85–110 ksi / 586–758 MPa | 80–105 ksi / 552–724 MPa |
| Yield Strength (0.2%) | 55–70 ksi / 379–483 MPa | 60–95 ksi / 414–655 MPa | 65–105 ksi / 448–724 MPa | 55–80 ksi / 379–552 MPa | 50–75 ksi / 345–517 MPa |
| Elongation (%) | 20–30 | 15–25 | 15–20 | 20–25 | 20–30 |
| Brinell Hardness (3000 kg) | 150–200 | 180–240 | 200–260 | 150–210 | — |
| Rockwell Hardness (B / C) | 80–90 B | 85–95 B | 85–95 B | 80–90 B | 80–90 B |
