|
|
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。- U0 V) P6 H# C4 y/ T* c; r
下面是德方意见:8 Q. H# g& I7 @+ W9 ~8 [
Material 20g for vacuum vessel has the following main disadvantages compared
- ?% a: R/ P$ K3 V; h; {* o8 pwith HII:+ \1 H c, j) M" w; z" ?& D
- Lower values for 0,2 limit at higher temperatures
6 F7 o' i4 U1 f9 u- no values for impact energy for 0°C and -20°C
: ^ v' y! J7 ]7 X0 A4 `2 B0 s- no minimum value for AL content in chemical composition. The material must
" q! }+ |5 k1 j! W- D3 a; u4 l @have a value of > /= 0,020% Al (see HII material) to ensure non aging of the& B5 H! U7 \0 J2 T
material.
" ?: w- Y% [" C) e H- lower value for Mn, R- ~6 M' n9 e
- Higher value for P and S
; V- v6 X; y, [+ Q4 N. {! R4 i% e
0 ^4 q3 [/ [7 c# ]% ?/ z2 _$ k% l+ B- }" N4 s: i
Therefore, we cannot agree to material 20g. |
|