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Medium carbon chromium-molybdenum alloy steel offering good strength, toughness and wear resistance. Exhibits good hardenability and responds well to heat treatment. Provides a balanced combination of mechanical strength and ductility for engineering applications.
Widely used for shafts, gears, axles, studs, bolts and general engineering components. Suitable for automotive and heavy-duty machinery parts requiring moderate strength and toughness.
| C | Si | Mn | Cr | Mo | P (Max) | S (Max) |
|---|---|---|---|---|---|---|
| 0.38–0.43 | 0.15–0.35 | 0.60–0.90 | 0.90–1.20 | 0.15–0.30 | 0.035 | 0.035 |
Annealing: 680–720°C, furnace cooling.
Hardening: 840–880°C, oil quenching.
Tempering: 500–650°C depending on required properties.
Provides good strength, toughness and wear resistance after heat treatment.
Supplied in Annealed, Normalized or Quenched & Tempered condition.
Typical hardness (Q&T): 280–320 HB (approx).
Round: Dia 20 – Dia 500 mm
Flat / Block: 50 – 500 mm
