S32750是目前超级双相不锈钢系列中的典型代表，与普通2205双相不锈钢相比，Cr、Mo、N含量均有一定程度的提高，尤其是N含量，达到2800ppm左右，耐点腐蚀指数PREN达到43，因而具有更高的强度、更为优越的耐氯离子点蚀、耐应力腐蚀性能。适用于石油化工、炼油、真空制盐、烟气脱硫等腐蚀环境更为苛刻的领域。目前世界上只有极个别国家可以生产。
部分不锈钢化学成份表
部分不锈钢化学成份表 |
|
规格 |
化学成份(%) |
|
中国 |
|
C |
Si |
Mn |
P |
S |
Ni |
Cr |
Mo |
|
0Cr19Ni9 |
≤0.08 |
≤1.00 |
≤2.00 |
≤0.035 |
≤0.035 |
8.00-10.50 |
18.00-20.00 |
|
|
0Cr19Ni11 |
≤0.030 |
≤1.00 |
≤2.00 |
≤0.035 |
≤0.035 |
9.00-13.00 |
18.00-20.00 |
|
|
0Cr17Ni12Mo2 |
≤0.08 |
≤1.00 |
≤2.00 |
≤0.035 |
≤0.035 |
10.00-14.00 |
16.00-18.00 |
2.00-3.00 |
|
0Cr19Ni14Mo2 |
≤0.030 |
≤1.00 |
≤2.00 |
≤0.035 |
≤0.035 |
12.00-15.00 |
16.00-18.00 |
2.00-3.00 |
|
日本 |
SUS304 |
≤0.08 |
≤1.00 |
≤2.00 |
≤0.040 |
≤0.040 |
8.00-11.00 |
18.00-20.00 |
|
|
SUS304L |
≤0.030 |
≤1.00 |
≤2.00 |
≤0.040 |
≤0.040 |
9.00-13.00 |
18.00-20.00 |
|
|
SUS316 |
≤0.08 |
≤1.00 |
≤2.00 |
≤0.040 |
≤0.040 |
10.00-14.00 |
16.00-18.00 |
2.00-3.00 |
|
SUS316L |
≤0.030 |
≤1.00 |
≤2.00 |
≤0.040 |
≤0.040 |
12.00-16.00 |
16.00-18.00 |
2.00-3.00 |
|
美国 |
Tp304 |
≤0.08 |
≤0.75 |
≤2.00 |
≤0.040 |
≤0.040 |
8.00-11.00 |
18.00-20.00 |
|
|
Tp304L |
≤0.035 |
≤0.75 |
≤2.00 |
≤0.040 |
≤0.040 |
8.00-13.00 |
18.00-20.00 |
|
|
Tp316 |
≤0.08 |
≤0.75 |
≤2.00 |
≤0.040 |
≤0.040 |
11.00-14.00 |
16.00-18.00 |
2.00-3.00 |
|
Tp316L |
≤0.035 |
≤0.75 |
≤2.00 |
≤0.040 |
≤0.040 |
10.00-15.00 |
16.00-18.00 |
2.00-3.00 |
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