Aug 6, 2012 · - Q235A and Q235B have the same tensile and yield: 375/235 Mpa - Both have the same allowable stress from ambient to 350C. The differences of A and B when using as vessel plate: Q235A: design pressure 1.0Mpa maximum, 16 mm thick maximum Q235B: design pressure 1.6Mpa maximum, 20 mm thick maximum Both shall not be used in toxic substances.

Apr 20, 2017 · Which group the materials used ( Q235B & Q345B) would fit in according to AWS D1.1 material grouping? Can pipes be covered with same WPS & PQR if it is of same material ? Should there be a seperate WPS & PQR for each inter material welding ? i.e. Q235B to Q345B , SS316 to Q235B or SS316 to Q345B ? or can this material variations be captured in ...