| ASTM A234/A234M-00a | |||||||||||
| Piping Fittings of Wrought Carbon Steel and Alloy Steel for | |||||||||||
| Moderate and High Temperature Service | |||||||||||
| Grade | Composition, % | ||||||||||
| C | Mn | P | S | Si | Cr | Mo | Ni | Cu | V | Nb | |
| WPB(1)(2)(3)(4) | 0.30 | 0.29-1.06 | 0.050 | 0.058 | 0.1min | 0.40 | 0.15 | 0.40 | 0.40 | 0.08 | 0.02 |
| WPC(1)(2)(3)(4) | 0.35 | 0.29-1.06 | 0.050 | 0.058 | 0.1min | 0.40 | 0.15 | 0.40 | 0.40 | 0.08 | 0.02 |
| WP11 CL1 | 0.05-0.15 | 0.30-0.60 | 0.030 | 0.030 | 0.50-1.00 | 1.00-1.50 | 0.44-0.65 | - | - | - | - |
| WP11 CL2 WP11 CL3 | 0.05-0.20 | 0.30-0.80 | 0.040 | 0.040 | 0.50-1.00 | 1.00-1.50 | 0.44-0.65 | - | - | - | - |
| GENERAL NOTE: | |||||||||||
| All values are maximum unless otherwise indicated. | |||||||||||
| NOTES: | |||||||||||
| (1) For 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. | |||||||||||
| Tensile Requirements | WPB | WPC, WP11CL2 | WP11CL1 | WP11CL3 | |||||||
| Tensile Strength, min, ksi[MPa] | 60-85 | 70-95 | 60-85 | 75-100 | |||||||
| (0.2% offset or 0.5% extension-under-load) | [415-585] | [485-655] | [415-585] | [520-690] | |||||||
| Yield Strength, min, ksi[MPa] | 32 | 40 | 30 | 45 | |||||||
| [240] | [275] | [205] | [310] | ||||||||
| Wall thickness | Elongation Requirements | ||||||||||
| in | mm | Longitudinal | Transverse | ||||||||
| Standard round specimen, or small | 22 | 14 | |||||||||
| proportional specimen, min % in 4D | |||||||||||
| Rectangular Specimen for wall thickness | ³0.312 | ³7.94 | 30 | 20 | |||||||
| 0.312in [7.94mm] and over, and for all small | |||||||||||
| sizes tested in full section; min % in 2in[50mm] | |||||||||||
| Rectangular Specimen for wall thickness | 0.281 | 7.14 | 28.5 | 19 | |||||||
| less than 0.312in [7.94mm]; min % in | 0.250 | 6.35 | 27.0 | 18 | |||||||
| 2 in[50mm] (0.5in [12.7mm] wide specimen) | 0.219 | 5.56 | 25.5 | - | |||||||
| 0.188 | 4.76 | 24.0 | - | ||||||||
| 0.156 | 3.97 | 22.5 | - | ||||||||
| 0.125 | 3.17 | 21.0 | - | ||||||||
| 0.094 | 2.38 | 19.5 | - | ||||||||
| 0.062 | 1.59 | 18.0 | - | ||||||||
| Where the wall thickness lies between two values above, the min elongation value is determined | |||||||||||
| by the following equations: | |||||||||||
| Longitudinal | E=48t+15.00 | ||||||||||
| Transverse | E=32t+10.00 | ||||||||||
| E = elongation in 2in[50mm], % | |||||||||||
| t = actual thickness of specimen, in[mm] | |||||||||||