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ASTM A403 WP304 and 316 are the common material grade for stainless steel butt weld pipe fittings, especially in the size of 4",6",8" 10" and 12". They are designed and manufactured in accordance with ASME B16.9 & B36.19
Buttweld fittings are including stainless steel pipe elbow and bend, ASTM A403 equal and reducing tee, SS316 concentric and eccentric reducer, SS304 stub end. All of them are widely used in oil&gas, petroleum, chemical industry, power plant, metal industry and oil tank.
Stainless Steel | ASTM A403 WP304/304L/304H, WP316/316L, WP310, WP317, WP321 |
Duplex Steel | ASTM A815 UNS S 31803, S 32205, S 32550, S 32750, S 32760 |
Alloy Steel | ASTM A234 WP1, WP5, WP9, WP11, WP12, WP22, WP91 |
Carbon Steel | ASTM A234 WPB, A860 WPHY42, 52, 60, 65, 70, 16Mn |
According to below chart, we will know if the dimensions of buttweld fittings are correct. That is very useful for manufacturing and inspecting.
Advantages
Marking and Packing
Inspection
Chemical Composition
Grade | C | Mn | P | S | Si | Ni | Mo | Cr |
SS304 | 0.08 | 2 | 0.045 | 0.03 | 1.0 | 8-11 | - | 18-20 |
SS304L | 0.035 | 2 | 0.045 | 0.03 | 1.0 | 8-13 | - | 18-20 |
SS316 | 0.08 | 2 | 0.045 | 0.03 | 1.0 | 10-14 | 2-3 | 16-18 |
SS316L | 0.035 | 2 | 0.045 | 0.03 | 1.0 | 10-16 | 2-3 | 16-18 |
Mechanical Properties
Grade | Tensile Strength (Mpa) | Yield Strength (Mpa) | Elongation (%) |
SS304 | 515 | 205 | 20 |
SS304L | 485 | 170 | 20 |
SS316 | 515 | 205 | 20 |
SS316L | 485 | 170 | 20 |