Available Shapes
AISI 6150 Spring Steel
AISI 6150 annealed hot-rolled (HR) steel, This grade of steel is an electric furnace melt of chrome vanadium steel possessing characteristics that include: oil-hardening, high resistance to vibratory stress, standard deformation, medium hardness, high torque strength, and bright polish.
6150 steel is similar to 5150. However, the addition of vanadium gives the 6150 steel greater hardness. AISI 6150 has low distortion properties and accepts heat treating easily. Welding may be done, but the material requires proper preheating and post weld stress relieving.
Applications
Analysis
Forging
Annealing
Hardening
Tampering
Heat Treatment
Applications
Typical applications include: Arbors Heavy Machinery Parts Gears Shafts High Strength Studs Spindles
Analysis
| Carbon | 0.48-0.53% | Silicon | 0.15-0.35% |
| Manganese | 0.70-0.90% | Phosphorous | 0.035% max |
| Chromium | 0.80-1.10% | Sulphur | 0.040% max |
| Vanadium | 0.15% min |
Forging
Preheat carefully, then raise temperature to 1050°C for forging. Do not forge below 840°C. After forging cool slowly in a furnace.
Annealing
Heat slowly to 820-840°C, soak well and cool slowly in a furnace.
Hardening
Heat slowly to 650-700°C and thoroughly soak. Continue to heat the 6150 steel to the final hardening temperature of 830-860°C and allow to be heated through. Oil quench.
Tampering
Temper 6150 spring steel immediately after hardening whilst tools are still hand warm. Re-heat to the tempering temperature then soak for one hour per 25 millimetre of total thickness (2 hours minimum) Cool in air. Tempering of this grade will be between 400-600°C for most applications.
Heat Treatment
Heat treatment temperatures, including rate of heating, cooling and soaking times etc. will vary due to factors such as the shape and size of each component. Other considerations during heat treatment include the type of furnace, quenching medium and work piece transfer facilities. Please consult a heat treatment provider for full guidance on heat treatment of 6150.
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