What are the properties of 35CrMo steel?

GB/T3077 35CrMo steel is a type of alloy steel that contains high amounts of chromium and molybdenum. It has a wide range of applications due to its excellent strength, toughness, and wear resistance. 35CrMo alloy steel has high amounts of chromium and molybdenum, which confer excellent properties to the material. Chromium enhances corrosion resistance and durability, while molybdenum improves hardness, toughness, and wear resistance. 35CrMo steel is a high-strength and toughness material that can withstand heavy loads and impacts. It also has good ductility and elongation, which make it suitable for various forming operations.

GB Alloy Steel Plate Chemical Composition
Grade	C	Si	Mn	Cr	Mo
12CrMo	0.08-0.15	0.17-0.37	0.40-0.70	0.40-0.70	0.40-0.55
15CrMo	0.12-0.18	0.17-0.37	0.40-0.70	0.80-1.10	0.40-0.55
20CrMo	0.17-0.24	0.17-0.37	0.40-0.70	0.80-1.10	0.15-0.25
25CrMo	0.22-0.29	0.17-0.37	0.60-0.90	0.90-1.20	0.15-0.30
30CrMo	0.26-0.33	0.17-0.37	0.40-0.70	0.80-1.10	0.15-0.25
35CrMo	0.32-0.40	0.17-0.37	0.40-0.70	0.80-1.10	0.15-0.25
42CrMo	0.38-0.45	0.17-0.37	0.50-0.80	0.90-1.20	0.15-0.25
50CrMo	0.46-0.54	0.17-0.37	0.50-0.80	0.90-1.20	0.15-0.30

The heat treatment of 35CrMo steel involves several stages, including annealing, quenching, and tempering. The following are the typical heat treatment processes for 35CrMo steel:

Annealing: The steel is heated to 800-850°C and held for a certain period to allow it to homogenize. It is then slowly cooled to room temperature to relieve internal stresses and improve ductility.

Quenching: The steel is heated to 880-920°C and held for a certain period to ensure that it is heated uniformly. It is then rapidly quenched in oil or water to achieve high hardness and toughness.

Tempering: The quenched steel is reheated to 500-600°C and held for a certain period to reduce brittleness and improve toughness. The exact temperature and holding time depend on the desired properties.

Applications of 35CrMo Alloy Steel

35CrMo steel is used in various industrial applications that require high strength, toughness, and wear resistance. Here are some of the applications of 35CrMo steel:

1. Manufacture of heavy machinery and plant equipment such as hydraulic cylinders, cranes, and excavators.

2. Construction of pipelines, boilers, and pressure vessels that require high resistance to corrosion and oxidation.

3. Fabrication of gears, shafts, and other mechanical components that require superior wear resistance and hardness.

4. Production of drill bits, cutting tools, and other tools that require high toughness and edge retention.

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