ASTM A709/A709M A709Grade 50W carbon low alloy steel plate is A high-strength, low-alloy structural steel plate utilized primarily in the manufacture of bridges. Chapel Steel stocks A709 Grade 36, A709 Grade 50 and A709 Grade 50W. These grades are often specified with Charpy tests referencing the specific zone or lowest anticipated service temperature. The Charpy tests are specified as non-fracture critical, which is a per-heat test (frequency "H"), or fracture critical, which is a per-plate test (Frequency "P"). Bridge steels can also be ordered to the ASSHTO M270 Specification referenced as AASHTO M270 Grade 36, AASHTO M270 Grade 50, AASHTO M270 Grade 50W.
ASTM A709/A709M Standard Specification for Structural Steel for Bridges. ASTM A709/A709M specification covers carbon and high-strength low alloy steel structural shapes, plates and bars, and quenched and tempered alloy steel for structural plates intended for use in bridges. ASTM A709/A709M Standard main steel grade: ASTM A709 Grade 36, 50, 50S, 50W, HPS50W (A709GR36, A709GR50, A709GR50S, A709GR50W, A709GRHPS50W)
Mechnical property for A709 Grade 50W Type A low alloy steel:
Yield strength (≥Mpa) |
Tensile strength (≥Mpa) |
Elongation in ≥,% |
|
345 |
485 |
200mm |
50mm |
|
18 |
21 |
Chemical composition for A709Gr50W Type A low alloy steel (Heat Analysis Max%)
Main chemical elements composition of A709Gr50W Type A |
|
C |
Si |
Mn |
P |
S |
Ni |
Cr |
Cu |
V |
|
0.19 |
0.30-0.65 |
0.80-1.25 |
0.04 |
0.05 |
0.40 |
0.40-0.70 |
0.25-0.40 |
0.02-0.10 |
High strength low alloy steel plate ASTM A709GR.50W also named as weathering steel plate A709 Grade 50W in advantage of its property in atmosphere corrosion resistance.According to the different main chemical elements contains,A709 Grade 50W was divided as A709Gr50w type A, A709Gr50w type B, 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 A709 Grade 50W also owned the same minimum limited yield strength at 345 Mpa as A709 Grade 50 steel plate.
