A234 WPB
This specification covers wrought carbon steel and alloy steel fittings
of Seamless and welded construction covered by the latest revision of ASME
B16.9, B16.11, MSS-SP-79, MSS-SP-83, MSS-SP-95, and MSS-SP-97. These fittings
are for use in pressure piping and in pressure vessel fabrication for service
at moderate and elevated temperatures.
Specifications
Mechanical & Physical Properties
| Property |
9.2 g/cm3 |
| Tensile Strength, min: |
60,000 psi (415 MPa] |
| Min. Yield Point: |
35,000 psi [240 MPa] |
| Elongation: |
22% min |
| Hardness, HB, max |
187 MAX |
Chemical Composition
| |
Composition, % |
| Carbon, max |
0.30 |
| Manganese |
0.29-1.06 |
| Phosphorus, max |
0.050 |
| Sulphur, max |
0.050 |
| Silicon |
0.1 MIN |
| Copper, max |
0.4 |
| Nickel, max |
0.4 |
| Chromium, max |
0.4 |
| Molybdenum, max |
0.15 MAX |
| Vanadium, max |
0.08 |
- => When fittings are of welded construction,?B Fittings made from bar or plate may have 0.35 max carbon.
- => Fittings made from forgings may have 0.35 max carbon and 0.35 max silicon with no minimum.
-
=> For each reduction of 0.01 % below the specified carbon maximum, an increase of 0.06 % manganese above the specified
maximum will be permitted, up to a maximum of 1.65%.
-
=> The sum of Copper, Nickel, Chromium, and Molybdenum shall not exceed 1.00%.
- => Applies both to heat and product analyses.?Columbium (Cb) and Niobium (Nb) are alternate names for element 41 in the Periodic Table of the Elements.
CE = C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15
