P20 Steel
1. Equivalent grades: DIN 1.2311 / 40CrMnMo7, 618(ASSAB)
2. Chemical composition:
|
Grade
|
C
|
Si
|
Mn
|
Cr
|
Mo
|
V
|
P
|
S
|
|
P20
|
0.35-0.45
|
0.20-0.40
|
1.30-1.60
|
1.80-2.10
|
0.15-0.25
|
-
|
0.03max
|
0.03max
|
3. Available sizes: Round dia 70mm to 600mm, length: 2500 - 5000mm
4. Manufacture: EF/ESR, hot forged
5. Surface condition: black/grinded/rough turned
6. Delivery condition: annealed/quenched and tempered
7. Hardness : annealed, 235HBS max/ after Q+T, hardness 28-35HRC
8 Hardness & tempering curve graph