Available Shapes
31CrMoV9 Steel
31CrMoV9 / 1.8519 steel suppliers and stockholders delivering to the whole of the Middle East. Nifty Alloys LLC are stockholders and suppliers of this grade in round bar in this grade which is commonly used in the automotive industry. 31CrMoV9 is a chromium molybdenum vanadium nitriding steel type grade commonly supplied in the quenched and tempered condition.
Applications
Analysis
Forging
Normalising
Annealing
Hardening
Tampering
Applications
With its high wear resistance 31CrMoV9 steel is used widely in the engineering and automotive industries. It is suitable for components with medium and large cross sections which require high tensile strength and good toughness. Typically used in gear and engine construction for components such as crankshafts, connecting rods, steering knuckles, screws and bolts.
Analysis
| Carbon | 0.27-0.34% | Chromium | 2.30-2.70% |
| Manganese | 0.40-0.70% | Molybdenum | 0.15-0.25% |
| Sulphur | 0.035% max | Silicon | 0.40% max |
| Phosphorous | 0.025% max | Vanadium | 0.10-0.25% |
Forging
Heat the 31CrMoV9 component slowly, allowing sufficient time for the steel to become heated through. Begin forging at 1050°C. Do not forge below 930°C reheating if necessary. After forging, cool very slowly.
Normalising
Heat to 860-900°C. Soak well and allow to cool in the air.
Annealing
Heat the steel uniformly to 680-720°C. Soak well, cool slowly in the furnace. Hardness after annealing is 248 HB max.
Hardening
Heat slowly and uniformly to 840-880°C until heated through. Quench in oil or water.
Tampering
Heat carefully to a suitable temperature, selected by reference to a tempering chart or table (usually between 540-680°C). Soak at the temperature for 2 hours per 25mm of ruling section, then allow to cool in the air.
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