440C Stainless Steel Straight Wire
440C stainless steel is a high carbon martensitic stainless with moderate corrosion resistance good strength and the ability to obtain and keep excellent hardness (Rc 60) and wear resistance.
440C stainless steel has a carbon content of C-1.%. This steel has good rust resistance. It is a commonly used stainless steel for imported mass production knives. Its chromium content is up to 16-18%. Quite popular. If heat treated as stainless bearing steel, cryogenic treatment is generally recommended before tempering. Such cryogenic treatment improves the hardness of the steel, increases wear resistance, and dimensional stability. Therefore, the cryogenic treatment of 440C is also often used for tool heat treatment.
The higher hardness and medium abrasion resistance, when grinding, it has the disadvantages of relatively high viscosity and rapid heating. It is recommended to use chrome corundum or microcrystalline corundum for grinding. The annealing temperature of 440C is very low. When heat treatment is performed for tools and bearings, the recommended hardness is HRC57-59. If the cryogenic treatment is performed, the hardness can reach HRC60
Mechanical properties
Hardness: annealing, ≤269HB; quenching and tempering, ≥633HV
Mechanical properties: Internal stress (250 N / mm2) Tensile strength (560 N / mm2) EL (18%) HB (250)
Heat treatment process
Heat treatment specifications and metallographic structure: Heat treatment specifications:
1) Annealing, slow cooling at 800 ~ 920 ℃;
2) Quenching, oil cooling at 1010 ~ 1070 ℃;
3) Tempering, rapid cooling at 100 ~ 180 ℃.
Metallographic structure: the organization is characterized by martensite type.
Delivery status: Generally delivered in a heat-treated state, and the type of heat treatment is specified in the contract; if it is not specified, it is delivered in a non-heat-treated state.
Factory direct sales high quality 440C stainless steel wire with reason price, any need, welcome your inquiry.
Related Products
