1. Main application:
Manganese-chromium-tungsten alloy steel, high quality ametabolic die steel; Nice machinability, stable size when hardened, high hardness on surface after hardened; well toughness, wear resistence and easy to be forged and quenched. Mainly used for cutting, cold stamping and forming tools, like reamer, extrusion die, sculpture mold and plastic small module, bakelite, silicon rubber mould and various tools, etc.
2. Manufacturers:
Changcheng Steel, Tiangong Steel
3. Delivery condition:
Conventional or ESR, hot rolling or forging, black surface or milling
Hardness: annealed, HB=<229
Thickness: 20~
4. General:
Little distortion after heat treatment, hardness up to HRC63,
Good toughness, good crack resistance, good maintenance of sharp cutting edge. Easy for processing.
5. Chemical composition:
|
C% |
Si% |
Mn% |
Cr% |
W% |
V% |
|
0.85~0.95 |
0.20~0.40 |
1.00~1.30 |
0.40~0.60 |
0.40~0.60 |
0.20 |
6. Mechanical properties:
Medium alloyed cold work steel with good hardening
capacity, high wear resistances, dimensionally stable
during heat treatment. Similar to JIS SKS3.
7. Available sizes:
Round Bar: Φ 6-410mm
Flat: 8-160*205-710mm
Mould: 200*200-1200*1000mm
Length: 3000-6000mm
Mill deliver conditions, or sawing or cutting for customer request.
8. Compared grades, based on usage:
|
Chinese |
German |
American |
Japanese |
EN |
|
GB |
DIN |
AISI |
JIS |
DIN |
|
9CrWMn |
1.2510 |
O1 |
SKS3 |
100MnCrW4 |
|
Grade |
Standard |
C |
Si |
Mn |
Cr |
V |
W |
P、S≤ |
|
O1 |
ASTM |
0.85-1.00 |
0.10-0.50 |
1.00-1.40 |
0.40-0.60 |
≤0.30 |
0.40-0.60 |
0.030 |
|
1.2510 |
DIN |
0.90-1.05 |
0.15-0.35 |
1.00-1.20 |
0.50-0.70 |
0.05-0.15 |
0.50-0.70 |
0.035 |
|
9CrWMn |
GB |
0.85-0.95 |
≤0.40 |
0.90-1.20 |
0.50-0.80 |
/ |
0.50-0.80 |
0.030 |
9. Physical features:
|
Soft annealed steel, max.229 HB. |
||||
|
Temperature [oC] |
20-100 |
20-200 |
20-300 |
20-400 |
|
Thermal expansion [10-6.K-1] |
12 |
12.6 |
13.1 |
13.5 |
|
Temperature [oC] |
20 |
350 |
|
|
|
Heat conductivity [W.m-1.K-1] |
33.4 |
32.1 |
|
|
10. Heat treatment:
Recommended temperatures for heat processing：
|
Soft annealing: |
Temperature [oC] |
Cooling |
|
740-770 |
Furnace |
|
|
Annealing after decreasing stress: |
Temperature [oC] |
Cooling |
|
600-650 |
Furnace |
|
|
Hardening and tempering: |
Austenization [oC] |
Hardening |
|
790-820 |
Oil, warm bath 180-220 oC |
