1.2311

Germany steel mold, the steel the "super pure" process production, the hardening, appear to be highly microscopic pure and good structure, fine homogeneous of polishing and light etching flower of sex. After the heat treatment, processing and polishing performance is good, nitriding process, and is suitable for surface treatment of chromium plating, material is qualitative hardness is uniform (to 400 mm thick), good toughness, good mechanical processing performance. Gold organization for martensite and bainite organization.
 

Supply state and hardness
The tempering pre-hard state, hardness is 285 ~ 325 HBS.

Chemical composition ( %)
C 0.37~0.42、Cr 1.80~2.10、Mn 1.40~1.60、Si≤0.40、Mo 0.15~0.25、S≤00.005、Ni 0.40

Hot working standard
Beginning temperature of 1050 ℃, the end in 850 ℃, with the temperature forging furnace slow cold.

Softening annealing mean
Annealing temperature of 710 ~ 740 ℃, and the furnace slow cold, hardness HB 235 or less.

Quenching and tempering norms
Quenching temperature of 840 ~ 870 ℃, oil cooling or 180 ~ 220 ℃, quenching salt bath hardness 51 HRC, 1730 MPa. Temperature 100 ℃ tempering / 200 ℃ 300 ℃ 400 ℃ / / ℃ 600 ℃ / 500/700 / ℃, hardness 51 HRC / 50 HRC / 48 HRC / 46 HRC / 42 HRC / 36 HRC / 28 HRC.

A typical example
(1) used for zinc, aluminum, magnesium and its alloy die-casting die
(2) the hot pressing die, all kinds of hot extrusion dies
(3) the extrusion die mold metal frame

Corresponding countries brand

Domestic brand: 5CrMnMo corresponding
Japan: sSKT3 corresponding grades
Brand: 6 G corresponding the United States