51CRV4 Spring Steel Sheets

51CRV4 Spring Steel Sheets

51CrV4/1.8159 spring steel is chromium-vanadium spring steel. It is an alloy steel similar to 5150 steel, with a small but effective amount of vanadium added to increase hardness. 51CrV4/1.8159 spring steel has low deformation characteristics and is easy to heat treatment. 51CrV4/1.8159 Spring steel grade for oil quenching and tempering.

51CrV4/1.8159 Spring steel is usually supplied in rolled condition. When used under oil quenching and tempering conditions, 51CrV4/1.8159 spring steel combines spring properties with excellent wear and impact resistance. Hardened 51CrV4/1.8159 spring steel has excellent toughness and impact resistance, making it an alloy spring steel suitable for withstand stress, vibration and impact parts

Forging Material:

Forged between 2150 and 1600ºF (1175 to 870ºC). After forging, the alloy should be slowly cooled or transferred to a furnace near the "finishing" temperature. Do not forge at temperatures below 840°C.

Heat Treatment:

• Preheat:

1200-1250F (650-675ºC), balanced.

• Annealing:

Keep at 1100-1300F (595-740ºC) for 2 hours while the air cools. Like the 5150 alloy, the microstructure of this 51CrV4/1.8159 spring steel provides the best machinability and is one of the coarse layer pearlite to coarse spheroid.

• Standardization:

51CrV4/1.8159 spring steel has a nominal normalizing temperature of 1650ºF (900ºC). This treatment is followed by air cooling.

• Straightening:

It is best done at 400-800F (205-425ºC).

• High temperature:

Soak at 1550-1650F (845-900ºC) for 10 to 30 minutes. For vacuum hardening, use the high side of the high temperature range and soaking time.

• Quenching:

Oil quench to hand temperature, 150F (65ºC). Immediately temper 51CrV4/1.8159 spring steel. Note that the vacuum furnace must have oil quenching capability.

• Temper:

It is recommended to temper at 400-1200 (205-650ºC) for 1 hour per inch (25mm) thickness. (Minimum 2 hours). The air cools to room temperature. For most applications, the tempering of 51CrV4/1.8159 spring steel will be between 400-600°C

Machinability:

easily machined from coarse pearlite to coarse spherical microstructure. 51CrV4/1.8159 spring steel has a machinability rating of 59.

Welding:

can be welded, but welding this steel must be preheated and post-welding stress relief.

The welding of 51CrV4/1.8159 spring steel should be carried out in the annealed state, rather than on the quenched and tempered material.

Application:

It is commonly used in high-stress mechanical parts, including shafts, gears, pinion gears, and hand tool parts. used in the automotive industry suitable for many general purpose engineering applications that require high tensile strength and toughness.

Product Quality Testing:

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