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PRODUCT
ASTM A420: American Society for Testing and Materials
Piping Fittings of Wrought Carbon Steel and Alloy Steel for Low-Temperature Service
Tensile Requirements | ||||||||
Requirement | Grade | |||||||
WPL6 | WPL9 | WPL3 | WPL8 | |||||
Tensile strength, min ksi [MPa] | 60 [415] − 85 [585] | 63 [435] − 88 [610] | 65 [450] − 90 [620] | 100 [690] − 125 [865] | ||||
Yield strength, min ksi [MPa] | 35 [240] | 46 [315] | 35 [240] | 75 [515] | ||||
Elongation Requirements | Grade | |||||||
WPL6 | WPL9 | WPL3 | WPL8 | |||||
Longitudinal | Transverse | Longitudinal | Transverse | Longitudinal | Transverse | Longitudinal | Transverse | |
Standard round specimen, or small proportional specimen,min % in 4 D | 22 | 12 | 20 | ... | 22 | 14 | 16 | ... |
Rectangular specimen for wall thickness 5⁄16 in. [7.94 mm] and over, and for all small sizes tested in full section; min % in 2 in. or 50 mm | 30 | 16.5 | 28 | 18 | 30 | 20 | 22 | ... |
Rectangular specimen for wall thickness less than 5⁄16 in [7.94 mm]; min % in 2 in. or 50 mm (1⁄2-in. [12.7- mm] wide specimen) | A | A | A | A | A | A | A | ... |
A For each 1⁄32 in. [0.79 mm] decrease in wall thickness below 5⁄16 in. [7.94 mm], a deduction of 1.5 %(grades WPL6, WPL9, and WPL3) or 1.25 % (WPL8) for longitudinal and 1.0 % (grades WPL6, WPL9 and WPL3) for transverse from the values shown above is permitted. The following table gives the minimum value for various wall thicknesses: |
Chemical Requirements | |||||||||||
Grade A | Composition % | ||||||||||
C | Mn | P | S | Si | Ni | Cr | Mo | Cu | Cb | V | |
WPL6 | 0.30 | 1.50-1.35 | 0.035 | 0.04 | 0.15-0.40 | 0.40 | 0.3 | 0.12 | 0.40 | 0.02B | 0.08 |
WPL9 | 0.20 | 0.40-1.06 | 0.030 | 0.03 | ... | 1.60-2.24 | 0.75-1.25 | ||||
WPL3 C | 0.20 | 0.31-0.64 | 0.05 | 0.05 | 0.13-0.37 | 3.2-3.8 | ... | ||||
WPL8 D | 0.13 | 0.90 | 0.30 | 0.03 | 0.13-0.37 | 8.4-9.6 | ... | ||||
A When fittings are of welded construction, the symbols above shall be supplemented by the letter "W". | |||||||||||
B By agreement, the limit for Columbium may be increased up to 0.05% on heat analysis and 0.06% on product analysis. | |||||||||||
C Fittings made from plate or forgings may have 0.90% max manganese. | |||||||||||
D Fittings made from plate may have 0.98% max manganese. |
Available Dimension Range | |||||||||||||
OD (mm/inch) | Wall thickness (SCH) | ||||||||||||
10 | 20 | 30 | STD | 40 | 60 | XS | 80 | 100 | 120 | 140 | 160 | XXS | |
21.3 (1/2'') | √ | √ | √ | √ | √ | √ | √ | √ | |||||
26.7 (3/4'') | √ | √ | √ | √ | √ | √ | √ | √ | |||||
33.4 (1'') | √ | √ | √ | √ | √ | √ | √ | √ | |||||
42.2 (1 1/4'') | √ | √ | √ | √ | √ | √ | √ | √ | |||||
48.3 (1 1/2'') | √ | √ | √ | √ | √ | √ | √ | √ | |||||
60.3 (2'') | √ | √ | √ | √ | √ | √ | √ | √ | |||||
73 (2 1/2'') | √ | √ | √ | √ | √ | √ | √ | √ | |||||
88.9 (3'') | √ | √ | √ | √ | √ | √ | √ | √ | |||||
101.6 (3 1/2'') | √ | √ | √ | √ | √ | √ | |||||||
114.3 (4'') | √ | √ | √ | √ | √ | √ | √ | √ | √ | ||||
141.3 (5'') | √ | √ | √ | √ | √ | √ | √ | ||||||
168.3 (6'') | √ | √ | √ | √ | √ | √ | √ | √ | |||||
219.1 (8'') | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
273 (10'') | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
323.8 (12'') | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ |
355.6 (14'') | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | |
406.4 (16'') | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | |
457 (18'') | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | |
508 (20'') | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | |
559 (22'') | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | √ | ||
610 (24'') | √ | √ | √ | √ | √ | √ | √ | √ |
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