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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。
5 u5 a; [6 j: [' S1 \下面是德方意见:
& q7 Z( Y$ g8 k7 \+ Q# G6 ^3 _! GMaterial 20g for vacuum vessel has the following main disadvantages compared3 a& i! U. E: D% }( R& f) u- l
with HII:& k% h3 U% I) r* m) L, C
- Lower values for 0,2 limit at higher temperatures% K9 E5 M$ P# Q1 X" `% b) b
- no values for impact energy for 0°C and -20°C* ]' Q9 D1 q, H+ Y) e( @1 W5 @
- no minimum value for AL content in chemical composition. The material must
/ Z, z% y. |& u8 @6 uhave a value of > /= 0,020% Al (see HII material) to ensure non aging of the
; Q' @" o1 t: L2 Xmaterial.
% o1 G2 n( U t8 H- lower value for Mn
% F3 B. k: \, d- Higher value for P and S+ W! V- K3 v3 Q+ L' q* s5 w
2 w# }/ |1 p" x8 A. Z8 W. _
g6 M8 |$ `, v3 R
Therefore, we cannot agree to material 20g. |
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