Carbon & Alloy Steel
ASTM A234/A234M WPB/WPC/WP11For each reduction of 0.01% below the specified C maximum, an increase of 0.06%
Mn above the specified maximum will be permitted, up to a maximum of 1.35%.
(2) The sum of Cu, Ni, Cr, and Mo shall not exceed 1.00%.
(3) The sum of Cr and Mo shall not exceed 0.32%.
(4) The maximum carbon equivalent (C.E.) shall be 0.50, based on heat analysis and
the formula C.E.=C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15.
(1) For each reduction of 0.01% C below 0.30%, an increase of 0.05%
Mn above 1.06% will be permitted, up to a maximum of 1.35%.
(2) Fittings made from forgings may have 1.35% max Mn.
(1) Values specified are for wall thickness 8mm and over. For each 1mm decrease in wall thickness below 8mm, a deduction of 1.5% for both longitudinal and transverse from the values shown above is permitted.
(2) Value not applicable to NPS below 32A.
(1) The minimum Si content is allowed to fall below 0.10%, when the steel is aluminium-killed or vacuum-deoxidized.
(2) A content in excess of the maximum value stated is permitted if a P content less than the maximum specified by 0.005% P per 0.001% N is observed. However the N content shall not exceed a value of 0.012% in the cast analysis and 0.014% in the product analysis.
(3) The specified value does not apply if the steels are supplied with the RR (instead of R) type of deoxidization.
Stainless Steel
ASTM A403 WP 304, 304L 316, 316LWhere the wall thickness lies between two values above, the min elongation value is determined by the following equations:
WPL6
Longitudinal E=48t+15.00
Transverse E=32t+6.50
E = elongation in 2in [50mm], %
t = actual thickness of specimen, in [mm]