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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。$ d ?3 ?* g( U: r, c; n+ X
下面是德方意见：
7 S9 @9 O; |! D t0 |, xMaterial 20g for vacuum vessel has the following main disadvantages compared' I( m( w; j3 n r
with HII:
# m( ` x0 _/ @* L: x5 V- Lower values for 0,2 limit at higher temperatures
5 d3 ~7 V3 E* `% O& m" t/ I- no values for impact energy for 0°C and -20°C# n) @( [9 }! N+ \% Q
- no minimum value for AL content in chemical composition. The material must* t& G0 h' g% V3 N8 E
have a value of > /= 0,020% Al (see HII material) to ensure non aging of the
$ H& C) E, a$ h2 w/ T5 Wmaterial.
1 _% U: p- T q/ Q* Z. Z- lower value for Mn: H, _; T! t% ]2 u; L
- Higher value for P and S
5 f( j+ O N; p5 R1 z! t2 ^7 r
, ~& X. z8 i- B. t
2 `) |9 c: P1 vTherefore, we cannot agree to material 20g. |
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