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发表于 2009-2-11 19:42:26
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来自： 中国辽宁鞍山
化学成份与20g相近，用途也与20g相同，但不可替代。国内还没有找到替代材质，我曾经用20g替代过该钢种，效果尚可，但还是没有达到外方要求效果。主要是高温性能不行，容器寿命短。舞阳钢厂可以生产HII钢即楼主所说的P265GH，我也曾用过，但价格高，周期长，使用效果很好。建议楼主与业主协商解决。7 A- ~! h# B! d; a
下面是德方意见：8 k0 |0 d/ N3 L: O
Material 20g for vacuum vessel has the following main disadvantages compared& I8 e+ x9 ~' ?5 Y! h; U* V
with HII:
! p, q. }! s9 x- Lower values for 0,2 limit at higher temperatures
0 k, h) k2 X+ p b/ J6 z4 ]- no values for impact energy for 0°C and -20°C, E* |) r$ T" E9 r* \
- no minimum value for AL content in chemical composition. The material must" F X) R+ V) Z5 h5 G) `, Q
have a value of > /= 0,020% Al (see HII material) to ensure non aging of the& }, n$ s# [7 e8 J0 d, z
material./ v9 ?" I+ m+ x( D6 M) M
- lower value for Mn4 W/ u7 Y$ s8 h/ y, w% P
- Higher value for P and S
3 I/ V# e* E7 B: X; ^
$ a- L a1 Z* b8 g% H
+ C& k) G9 E: D8 O* WTherefore, we cannot agree to material 20g. |
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