Description:
Standard: GBT 1299-1985

Features and application:

The steel shock-resistant tool steel, can be used as punching or piercing tool cut mold, forging mold, fusible alloy die-casting mold, and hot and cold cutting metal with a cutting blade, etc.

Chemical composition:

Carbon C: 0.45 ~ 0.55

Si Si: 0.20 ~ 1.00

Manganese Mn: 0.20 ~ 0.90

Sulfur S: ≤ 0.030

Phosphorus P: ≤ 0.030

Chromium Cr: 3.00 ~ 3.50

Ni: to allow the residual content of ≤ 0.25

Copper Cu: to allow the residual content of ≤ 0.30

Mo Mo: 1.30 ~ 1.80

Cobalt Co: ≤ 1.00

Mechanical properties:

Hardness: Quenching, ≥ 56HRC

Heat treatment and microstructure specifications:

Standard heat treatment: quenching the sample 860 ~ 900 ℃, oil cooling.