|
|
发表于 2009-2-11 19:42:26
|
显示全部楼层
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。9 k! l% Y, X9 [/ a9 C
下面是德方意见:9 `# Z" [5 ^: D5 X+ ~: e4 H" |
Material 20g for vacuum vessel has the following main disadvantages compared% F6 ]( `0 ] h# b% a
with HII:! D9 r& g; G* `8 p6 X# K, _; X3 \8 B/ R
- Lower values for 0,2 limit at higher temperatures7 s: A7 `( T9 Q" f9 Z1 a
- no values for impact energy for 0°C and -20°C! h/ h7 @. k1 K2 G& H/ H' ]$ N
- no minimum value for AL content in chemical composition. The material must
8 Y/ ]1 c9 b8 n R* ahave a value of > /= 0,020% Al (see HII material) to ensure non aging of the
, B' `6 w+ p S# }material.& v1 L l; s. T' ?' J/ p
- lower value for Mn
+ U* g+ S$ R" O: c2 b$ W) r9 Z' {- Higher value for P and S
$ [3 g, R" Q7 v' A7 H3 N3 g0 h- p0 w, [ b
* Y1 c0 l$ [( f3 sTherefore, we cannot agree to material 20g. |
|