Material of expansion joint
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The last edit to this post was made by hgm on 2011-7-28 at 22:27. Table A2 in GB16749-1997 \"Wave Expansion Joints for Pressure Vessels\" lists the expansion joints made of carbon steel; regardless of size or thickness, both Q235A and 20HP are included； But I found that many 20R and Q345R materials are unavailable. May I ask: 1. Why are so many 20R and Q345R materials not available? 2. By the way, I took a look at GB6653-1994 \"Steel Plates for Welding Cylinders\", and there’s no grade named 20HP in it
There’s also the stainless steel; it seems to be different from the stainless steel grades we commonly use! Also seeking expert help to solve it