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ASTM A334 Seamless And Welded Carbon And Alloy Steel Tubes
This specification covers several grades of minimum-wall-thickness, seamless and welded, carbon and alloy-steel tubes intended for use at low temperatures. Some product sizes may not be available under this specification because heavier wall thicknesses have an adverse affect on low-temperature impact properties.
Description
Tianjin Wanlei Steel Pipe Co., Ltd. is one of the leading manufacturers and suppliers of astm a334 seamless and welded carbon and alloy steel tubes in China, featured by quality products and low price. If you're going to wholesale durable astm a334 seamless and welded carbon and alloy steel tubes made in China, welcome to get pricelist and free sample from our factory.
1.Chemical composition
| Element | composition % | ||||||
| Grade1 | Grade3 | Grade6 | Grade7 | Grade8 | Grade9 | Grade1 1 | |
| C max | 0.30 | 0.19 | 0.30 | 0.19 | 0.13 | 0.20 | 0.10 |
| Mn | 0.40-1.06 | 0.31-0.64 | 0.29-1.06 | 0.90max | 0.90max | 0.40-1.06 | 0.60 max |
| P max | 0.025 | 0.025 | 0.025 | 0.25 | 0.025 | 0.025 | 0.025 |
| S max | 0.025 | 0.025 | 0.025 | 0.25 | 0.025 | 0.025 | 0.025 |
| Si | ... | 0.18-0.37 | 0.10min | 0.13-0.32 | 0.13-0.32 | ... | 0.35 max |
| Ni | ... | 3.18-3.82 | ... | 2.03-2.57 | 8.40-9.60 | 1.60-2.24 | 0.35-0.37 |
| Cr | ... | ... | ... | ... | ... | ... | 0.5 max |
| Cu | ... | ... | ... | ... | ... | 0.75-1.25 | ... |
| Al | ... | ... | ... | ... | ... | ... | ... |
| Co | ... | ... | ... | ... | ... | ... | 0.5 max |
| Mo | ... | ... | ... | ... | ... | ... | 0.5 max |
2.Mechanical property
| Grade 1 | Grade3 | Grade6 | Grade7 | Grade8 | Grade9 | Grade11 | |
Mpa | Mpa | Mpa | Mpa | Mpa | Mpa | Mpa | |
Tensile Strength min | 380 | 450 | 415 | 450 | 690 | 435 | 450 |
| Yield strength in 2 in min % | 205 | 240 | 240 | 240 | 520 | 315 | 240 |
| basic minimum elongation for walls 8mm and over in thickness strip tests and for all small sizes tested in full section | 35 | 30 | 30 | 30 | 22 | 28 | 18A |
| When standard round 50mm gage length equal to 4D is used | 28 | 22 | 22 | 22 | 16 | ... | ... |
AElongation of Grade 11 is for all walls and for small sizes tested in full section.
3.Marking
According to standard or per customer request.
4.Packing
(1) In loose
(2) In bundles up to 2000 kg tied in minimum six places with rope
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