High strength low alloy steel plate ASTM A709 GR 50W also named as weathering steel plate. ASTM A709 Grade 50W in advantage of its property in atmosphere corrosion resistance.
Chemical composition of Product analysis for ASTM A709 Grade 50W low alloy steel plate (Max %):
| Steel Grade | The Main Elements in rolling A709 Gr.50W steel plates | ||||
| C | Si | Mn | P | S | |
| A709 Gr.50W | 0.19 | 0.30-0.65 | 0.80-1.25 | 0.04 | 0.05 |
| Cr | Cu | V |
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| |
| 0.40/0.65 | 0.25/0.40 | 0.02/0.10 |
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The rolling size of ASTM A709 Grade 50W low alloy steel plate:
| Thickness | 1.2-600mm |
| Width | 1220-4200mm |
| Length | 5000-18000mm |
Notes: coil thickness ≤ 25mm
According to the different main chemical elements contains, ASTM A709 Grade 50W was divided as ASTM A709 Gr50w type A, ASTM A709 Gr50w type B, ASTM A709Gr50w type C.These three steel grades are equivalent to specification ASTM A 588/A 588M A588 Grade A,A588 Grade B and A588 Grade C. Low alloy steel plate ASTM A709 Grade 50W also owned the same minimum limited yield strength at 345 Mpa as ASTM A709 Grade 50W steel plate.
