Features and Scope

5CrMnMo hot die steel is nickel-free steel forging dies, performance and 5CrNiMo steel close. 5CrMnMo tool steel suitable for the production side length ≤ 400mm medium-sized hammer forging die.

The steel is hot-work tool steel, in addition to hardenability, heat fatigue, a less external, 5CrMnMo steel with similar performance with 5CrNiMo steel, hardenability somewhat less. The steel required for the production of high strength and high wear resistance of various types of forging dies, requiring higher toughness, can be used ESR steel.

Chemical composition

Carbon C: 0.50 ~ 0.60

Si Si: 0.25 ~ 0.60

Manganese Mn: 1.20 ~ 1.60

Sulfur S: ≤ 0.030

Phosphorus P: ≤ 0.030

Chromium Cr: 0.60 ~ 0.90

Ni: to allow the residual content of ≤ 0.25

Copper Cu: to allow the residual content of ≤ 0.30

Mo Mo: 0.15 ~ 0.30

Mechanical properties

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

Heat treatment

Standard heat treatment: quenching, 820 ~ 850 ℃ oil cooling.

Recommended 5CrMnMo quenching of steel specifications:

3 quenching temperature / ℃ Medium temperature / ℃ cooling hardness (HRC)

820 850 Oil 150 180 至 150 ~ 180 ℃ cold air after a small molds, tempering immediate and medium-sized mold 52 to 58

Note: 1. Medium-sized forging die using the maximum heating temperature, heating temperature of small forging die using the lower limit;

(2) To reduce the stress and mold deformation after quenching, quenching is best cold air to 740 ~ 760 ℃, and then oil-cooling, cooling to about 150 ~ 180 ℃, and immediately remove the annealing;

5CrMnMo tempering steel recommended specifications:

Use of heating temperature tempering / ℃ heating medium hardness (HRC)

Eliminate the stress, stability, organization, and Size

Ⅰ work part mold

Small forging die 490 to 510 gas stove or furnace 41 to 47

Medium-sized forging die 520 ~ 540 38 ~ 41 Ⅱ dovetail part of the forging die

Small forging die 600 to 620 gas stove or furnace 35 to 39

Medium-sized forging die 620 ~ 640 34 ~ 37