Seamless steel pipe


Standard
GB9948---------
 China National Standard


Model:
10、20、12CrMo 、15CrMo、1Cr2Mo、1Cr5Mo、1Crl9Ni9、1Crl9Ni11Nb


Mechanical properties

Grade

 

 

Tensile strength(Mpa)
Yield strength(Mpa)
Elongation(%)
The impact of power(J)
10
330~490
≥205
≥24
/
20
410~550
≥245
≥21
≥39
12CrMo
410~560
≥205
≥21
≥55
15CrMo
440~640
≥235
≥21
≥47
1Cr2Mo
≥390
≥175
≥22
≥92
1Cr5Mo
≥390
≥195
≥22
≥92
1Cr19Ni9
≥520
≥205
≥35
/
1Cr19Ni11Nb
≥520
≥205
≥35
/



Chemical Composition

Grade

 

 

C
Si
Mn
P
S
Cr
Mo
Ni
10
0.17~0.24
0.17~0.37
0.35~0.65
≤0.035
≤0.035
≤0.15
/
≤0.25
20
0.17~0.24
0.17~0.37
0.35~0.65
≤0.035
≤0.035
≤0.25
/
≤0.25
12CrMo
0.08~0.15
0.17~0.37
0.40~0.70
≤0.035
≤0.035
0.40~0.70
0.40~0.55
≤0.30
15CrMo
0.12~0.18
0.17~0.37
0.40~0.70
≤0.035
≤0.035
0.80~1.10
0.40~0.55
≤0.30
1Cr2Mo
≤0.15
0.50~1.00
0.30~0.60
≤0.035
≤0.035
2.15~2.85
0.45~0.65
/
1Cr5Mo
≤0.15
≤0.50
≤0.60
≤0.035
≤0.035
4.00~6.00
0.45~0.60
≤0.60
1Cr19Ni9
0.04~0.10
≤1.00
≤2.00
≤0.035
≤0.035
18.00~20.00
/
8.00~11.00
1Cr19Ni11Nb
0.04~0.10
≤1.00
≤2.00
≤0.035
≤0.035
17.00~20.00
/
9.00~13.00