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Chromium-molybdenum alloy steel with high strength, toughness and good hardenability. Exhibits excellent fatigue resistance, wear resistance and impact strength after heat treatment. Suitable for applications requiring a combination of strength and toughness.
Widely used for shafts, gears, bolts, studs, crankshafts, and heavy-duty machinery components. Suitable for automotive, oil & gas, and engineering industries requiring high strength and durability.
| C | Si | Mn | Cr | Mo | P (Max) | S (Max) |
|---|---|---|---|---|---|---|
| 0.38–0.43 | 0.15–0.35 | 0.75–1.00 | 0.80–1.10 | 0.15–0.25 | 0.035 | 0.035 |
Annealing: 650–700°C, furnace cooling.
Hardening: 840–870°C, oil quenching.
Tempering: 500–650°C depending on required strength and toughness.
Achieves high strength, toughness and fatigue resistance after heat treatment.
Supplied in Annealed, Normalized or Quenched & Tempered condition.
Typical hardness (Q&T): 28–32 HRC (approx).
Round: Dia 20 – Dia 500 mm
Flat / Block: 50 – 500 mm
