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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。2 R: R0 b; y0 ^' `# ]: D/ S
下面是德方意见:0 l: u6 I3 A3 V( y- Q
Material 20g for vacuum vessel has the following main disadvantages compared; {: t" U2 |: ?
with HII:" J, z+ n+ l2 r; o
- Lower values for 0,2 limit at higher temperatures/ O/ H6 g0 v$ v& Y4 h9 f2 `, t/ ]
- no values for impact energy for 0°C and -20°C
4 L( ]" j: R& k* G% t- no minimum value for AL content in chemical composition. The material must1 O. s) R* L0 A& X
have a value of > /= 0,020% Al (see HII material) to ensure non aging of the
, ^* u4 @' J( @2 amaterial.
8 q! A* L Q; R! u- lower value for Mn
. t- s! u* X+ e' U$ I* L9 ~- Higher value for P and S
; F e. P0 V7 x" Y
2 P* _! ?% F$ E# O# v& ~5 J, B; R$ h
Therefore, we cannot agree to material 20g. |
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