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5CrNiMo steel
Public Time:2011年10月15日 | Sort:Alloy structural steel | Hits:1175

Alloy tool steel: 5CrNiMo

Scale: GB / T 1299-1985

Corresponding U.S. AST Grade: T61206 (UNS)

Corresponding to the Japanese JIS Grade: SKT4

Corresponding to the German DIN, DINEN grades: 55NiCrMoV6

● Features and combined range:

5CrNiMo steel with good toughness, strength and high wear resistance. It is gentle in Room 500 ~ 600 ℃ when the mechanical function almost the same. Heated to 500 ℃, can still hold about the hardness of HB300. Because the steel contains molybdenum, which is not sensitive to the temper brittleness. Slowly cooled down from 600 ℃ after the impact toughness is only slightly reduced.

5CrNiMo steel has good hardenability. 300mm × 400mm × 300mm chunks of steel materials, oil quenched from 820 ℃ and 560 ℃ tempering, the hardness of the various departments cross-section is almost the same.

The various kinds of steel used to make large and medium-sized forging die.

This kind of steel is easy to form the white point, the need for strict control of the smelting process of cooling after rolling and forging rail system

5CrNiMo approximate composition of foreign steel: U.S. L6 (AISI), Japan SKT4 (JIS) in Japan GFA (Datong) Japan DM (Hitachi), Germany 1.2713 (W-Nr) France 55NiCrMoV7 (NF).

Chemical composition:

Carbon C: 0.50 ~ 0.60

Si Si: ≤ 0.40

Manganese Mn: 0.50 ~ 0.80

Sulfur S: ≤ 0.030

Phosphorus P: ≤ 0.030

Chromium Cr: 0.50 ~ 0.80

Ni-Ni: 1.40 ~ 1.80

Copper Cu: agreed to the residual content of ≤ 0.30

Vanadium V: agreed residual content of <0.2

Mo Mo: 0.15 ~ 0.30

Mechanical function:

Hardness: Annealed, 241 ~ 197HB, indentation diameter of 3.9 ~ 4.3mm

Heat treatment and microstructure specifications:

Standard heat treatment: quenching, 830 ~ 860 ℃ oil cooling.

Delivery status: delivery of steel in the annealed condition.

 

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