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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。0 p6 g9 g y( q! e4 v
下面是德方意见:6 c& d0 C0 C" u$ M
Material 20g for vacuum vessel has the following main disadvantages compared( g( p5 b" \" l( U
with HII:7 t( \& s- k' r0 W G. K; V
- Lower values for 0,2 limit at higher temperatures
' _* }' T4 K% E0 W: {: {- \- no values for impact energy for 0°C and -20°C
$ f* I8 j( ?+ d: f- H, M. e0 }- no minimum value for AL content in chemical composition. The material must
9 T8 h- S7 L: T2 hhave a value of > /= 0,020% Al (see HII material) to ensure non aging of the
1 @2 w R4 }9 _5 jmaterial.
+ H( P4 W$ [1 l$ a& `- lower value for Mn. n' D( O9 h$ S) b2 U! h z4 S% N
- Higher value for P and S( K& {& q. q6 ?- {( P
3 w" l' k h- D- q2 @; L9 x, ^2 W, s5 r9 H5 I( r5 ^4 x) m
Therefore, we cannot agree to material 20g. |
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