O1 1.2510 SKS3 Special Alloy Cold Work Tool Steel Flat Bar
1. Features
1) Little distortion after heat treatment
2) Hardness up to HRC63
3) Good toughness, good crack-resistance
2. Similar Standards
Chinese |
American |
German |
Japanese |
GB |
AISI |
DIN |
JIS |
9CrWMn |
O1 |
1.2510 |
SKS3 |
3. Chemical Composition
Grades |
C |
Si |
Mn |
P |
S |
V |
W |
Cr |
1.251 |
0.90-1.05 |
0.15-0.35 |
1.0-1.2 |
≤0.035 |
≤0.035 |
0.05-0.15 |
0.5-0.7 |
0.5-0.7 |
9CrWMn |
0.85-0.95 |
≤0.4 |
0.9-1.2 |
≤0.035 |
≤0.035 |
/ |
0.5-0.8 |
0.5-0.8 |
O1 |
0.85-0.95 |
0.2-0.4 |
1.0-1.3 |
≤0.035 |
≤0.035 |
0.2 |
0.4-0.6 |
0.4-0.6 |
4. Heat Treatment
Quenching |
Tempering |
Heating Temperature/ºC |
Cooling |
Hardness/HRC |
Heating Temperature/ºC |
Cooling |
Hardness/HRC |
820-840 |
Oil |
64-66 |
160-180 |
Air |
≥62 |
5. Applications
- Used for make cold die with small cross section and complicated shape and high precision
- Used to make sheet stamping touch, jewelry embossing mold
- Widely used in cutting tools, such as broaches, filament taps, long reamer, special milling cutters
- For the overall hardened plastic mold
- For thermosetting plastic forming, it requires high wear resistance and high strength mold
6. Stock Size
flat bar |
Thickness |
10-70mm |
Width |
155-610mm |
Length |
3000-6000mm |
steel round bar |
Diameter |
14-100mm |