| Equivalent grades |
GB |
DIN |
AISI |
JIS |
- |
| 3Cr2Mo |
1.2311 |
P20 |
- |
- |
| Chemical Composition |
C |
Si |
Mn |
Cr |
P |
S |
Mo |
Ni |
- |
- |
| 0.35-0.45 |
0.20-0.40 |
1.30-1.60 |
1.80-2.10 |
≤0.030 |
≤0.035 |
0.15-0.25 |
- |
- |
- |
| Available size |
Round Bar |
Diameter |
Length |
| 60-800mm |
2000-6000mm |
| Flat Bar |
Thickness |
Width |
Length |
| 25-400mm |
200-800mm |
2000-6000mm |
| Smelting&shaping |
EF/ ESR+ hot forged/ hot rolled |
| Surface condition |
Black surface/ Grinded/ Machined |
| Annealed hardness |
50-54 HRC |
| Characteristics |
good toughness properties, easy to machine, better polishability than 1.2312,
dimensional stability flame hardenable, good photoengraving properties |
| Applications |
Plastic moulds,frames for plastic pressure dies,hydroforming tools |
| Heat Treatment |
Annealing |
Heat to 720÷750°Cfor 2÷4 h furnace cool. |
|
| Stress relieving |
Up to 560÷600°C, hold for 2÷4h; furnace or still air cooling. |
| Tempering |
To be carried out after hardening in the range 580÷650°C for 25mm of thickness minimum 2h. |
