Used for making pressure-pipelines and boiler super heater tubes for ships
Executive standards:GB/T5312-1999 and it also be supplied according to related standards of ships classifications.
The products have been certified by CCS(China),DNV(Norway)and BV(France),will be certified by LR(UK),GL(Germany)and ABS(America)in 2009.
MECHANICAL PROPERTIES
|
STANDARD |
GRADE |
TENSILE STRENGTH(MPA) |
MIN YIELD POINT(MPA) |
ELONGATION (%) |
IMPACT ENERGY（J） |
HB |
|
GB3087 |
10 |
335～475 |
≥195 |
≥24 |
|
/ |
|
20 |
410～550 |
≥245 |
≥20 |
|
/ |
|
GB5310 |
20G |
410～550 |
≥245 |
≥24 |
≥35 |
/ |
|
GB/T8162 |
10 |
335 |
185～205 |
24 |
|
|
|
20 |
390 |
225～245 |
20 |
|
|
|
35 |
510 |
285～305 |
17 |
|
|
|
45 |
590 |
315～335 |
14 |
|
|
|
Q345 |
490 |
305～325 |
21 |
|
|
|
GB/T8163 |
10 |
335～475 |
195～205 |
24 |
|
|
|
20 |
410～550 |
235～245 |
20 |
|
|
|
Q295 |
430～610 |
285～295 |
22 |
|
|
|
Q345 |
490～665 |
315～325 |
21 |
|
|
|
ASME SA106 |
SA106B |
≥415 |
≥240 |
≥22 |
≥35 |
/ |
|
SA106C |
≥485 |
≥275 |
≥20 |
≥35 |
/ |
|
ASTM A106 |
A106 Gr.A |
≥330 |
≥205 |
35 Longitudinal |
|
|
|
25 Transverse |
|
A106 Gr.B |
≥415 |
≥240 |
30 Longitudinal |
|
|
|
16.5 Transverse |
|
A106 Gr.C |
≥485 |
≥275 |
30 Longitudinal |
|
|
|
16.5 Transverse |
CHEMICAL COMPOSITION
|
STANDARD |
GRADE |
CHEMICAL COMPOSITION（％） |
|
C |
SI |
MN |
P |
S |
CR |
MO |
CU |
NI |
V |
|
GB3087 |
10 |
0.07～0.13 |
0.17～0.37 |
0.38～0.65 |
≤0.030 |
≤0.030 |
0.3～0.65 |
/ |
≤0.25 |
≤0.30 |
/ |
|
20 |
0.17～0.23 |
0.17～0.37 |
0.38～0.65 |
≤0.030 |
≤0.030 |
0.3～0.65 |
/ |
≤0.25 |
≤0.30 |
/ |
|
GB5310 |
20G |
0.17～0.24 |
0.17～0.37 |
0.35～0.65 |
≤0.030 |
≤0.030 |
≤0.25 |
≤0.15 |
≤0.20 |
≤0.25 |
≤0.08 |
|
ASME SA106 |
SA106B |
0.17～0.25 |
≥0.1 |
0.70～1.00 |
≤0.030 |
≤0.030 |
≤0.035 |
|
|
|
|
|
ASTM A106 |
A106 Gr.A |
≤0.25 |
≤0.10 |
0.27～0.93 |
≤0.035 |
≤0.035 |
≤0.40 |
≤0.15 |
≤0.40 |
≤0.40 |
≤0.08 |
|
A106 Gr.B |
≤0.30 |
≤0.10 |
0.29～1.06 |
≤0.035 |
≤0.035 |
≤0.40 |
≤0.15 |
≤0.40 |
≤0.40 |
≤0.08 |
|
A106 Gr.C |
≤0.35 |
≤0.10 |
0.29～1.06 |
≤0.035 |
≤0.035 |
≤0.40 |
≤0.15 |
≤0.40 |
≤0.40 |
≤0.08 | | 
