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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。( R3 F& J, H+ d) x. B, ^: V
下面是德方意见:2 J+ ]' [/ A5 C4 c" ?
Material 20g for vacuum vessel has the following main disadvantages compared! n- d, ?8 j8 y- i Z9 E
with HII:; | Z3 [* x: t8 c* I' Q8 A
- Lower values for 0,2 limit at higher temperatures' y" J; M) U* R1 K
- no values for impact energy for 0°C and -20°C
: j$ F. g7 [1 p8 L3 C: _9 Z3 F' u- no minimum value for AL content in chemical composition. The material must. V$ k( n: U- ?! {" J+ c: K
have a value of > /= 0,020% Al (see HII material) to ensure non aging of the
5 r6 v& k8 T2 \" {material.
6 m0 s1 A- k5 p+ d: S w- lower value for Mn
# w+ j/ M! F K4 H( \' B _2 G2 H- Higher value for P and S( W5 P) g. \( _/ J& H) S
% R; i' a+ A6 V( |% s
- @+ M& w9 F' u" P% vTherefore, we cannot agree to material 20g. |
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