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Commonly used material chemical element and mechanics performance
| Steel number valve symbol |
name |
Chemical composition (quality score)(%) |
Mechanics performance≥ |
Corres
ponding
omestic trademark
GB) |
| C |
Si |
Mn |
P≤ |
S≤ |
Cr |
Ni |
MO |
Other |
b
Kis/Mpa |
S
Kis/Mpa |
(%) |
| C |
Carbon steel |
0.17- 0.23 |
0.17- 0.37 |
0.35- 0.65 |
0.035 |
O.035 |
O.25 |
0.3 |
- |
Ti5(C-
0.02)-0.7 |
410 |
245 |
25 |
20# |
| P |
Stainless steel |
≤0.12 |
≤1.5 |
0.8-2.0 |
0.045 |
0.030 |
17.0-20.0 |
8.0-11.0 |
- |
Ti5(C-
0.02)-0.7 |
441 |
196 |
25 |
ICr18
Ni9Ti |
| R |
Chromium nickel
molybdenum titanium steel |
≤0.12 |
≤1.5 |
0.8-2.0 |
O.045 |
0.030 |
76.0-19.0 |
11.0-13.0 |
2.0-3.0 |
V
0.15-0.3 |
490 |
216 |
30 |
ICr18Ni
12Mo2Ti |
| V |
Chromium molybdenum
vanadium steel |
0.07-0.15 |
- |
- |
- |
- |
0.90-1.20 |
- |
0.25-0.35 |
- |
- |
- |
- |
12CrMOV |
| ASTM A276-92 304 |
Stainless, heat-resisting
steel rod, molding |
≤0.08 |
≤1.00 |
≤2.00 |
0.045 |
0ï¼?30 |
18.00-20.00 |
8.00-0.50 |
- |
- |
75(517) |
30(207) |
40 |
OCr8Ni9 |
| 304l |
Stainless, is heat-resisting,
the steel rod, the molding |
≤0.03 |
≤1.00 |
≤2.00 |
O.045 |
0ï¼?30 |
18.00-20.O |
8.00-1 0.50 |
- |
- |
75(517) |
30(207) |
40 |
OOCr8Ni10 |
| 316 |
Stainless, is heat-resisting,
the steel rod, the molding |
≤0.08 |
≤1.00 |
≤2.00 |
0.045 |
0ï¼?30 |
16.00-18.00 |
10.00-14.0( |
2.00-3.00 |
- |
?5(517) |
30(207) |
40 |
OCr18N1
2Mo2Ti |
| 316L |
Stainless, is heat-resisting,
the steel rod, the molding |
≤0.03 |
≤1.00 |
≤2.00 |
0.045 |
0ï¼?30 |
16.00-18.00 |
10.00-14.00 |
2.00-3.00 |
- |
75(517) |
30(207) |
40 |
OOCr7Ni
14Mo2 |
| 321 |
Stainless, is heat-resisting,
the steel rod, the molding |
≤0.08 |
≤1.00 |
≤2.00 |
0.045 |
0.030 |
17.00-19.0C |
9.00-13.00 |
- |
Ti≥0.4 |
75(517) |
30(207) |
40 |
OCr18
Ni9Ti |
| ASTM A105-91 |
The pipeline uses the carbon
steel forging |
≤0.35 |
≤0.35 |
0.60-1.05 |
0.040 |
0.050 |
- |
- |
- |
- |
70(483) |
36(248) |
22 |
25#
25Mn |
|
