ASTM A709 steel plate
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ASTM A709 steel plate
The ASTM A709 is the Standard Specification for Structural Steel for Bridges and encompasses carbon, high-strength low-alloy, and quenched and tempered alloy steels used as structural plates in the construction of bridges. the following five grades of A709; 36, 50, 50W, HPS 50W and HPS 70W. The three weather grades of 50W, HPS 50W, and HPS 70W have an ASTM G101 enhanced Atmospheric Corrosion Resistance Index of ≥6.0.
Chemical composition & Mechanical property
A709 Grade 36 Chemical composition Heat analysis
| Thick mm | Structural steel | Steel Plate | Round Bar steel | |||||
| ≤20 | 20~≤40 | 40~≤65 | 65~≤100 | ≤20 | 20~≤40 | 40~≤100 | ||
| C,max,% | 0.25 | 0.25 | 0.25 | 0.25 | 0.27 | 0.26 | 0.27 | 0.28 |
| Mn,% | … | … | 0.80-1.20 | 0.80-1.20 | 0.80-1.20 | … | 0.60-0.90 | 0.60-0.90 |
| P,max,% | 0.04 | 0.04 | 0.04 | 0.04 | 0.04 | 0.04 | 0.04 | 0.04 |
| S,max,% | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 | 0.05 |
| Si | 0.40max | 0.40max | 0.40max | 0.15-0.40 | 0.15-0.40 | 0.40max | 0.40max | 0.40max |
| Cu,min,% | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 | 0.20 |
A 709 Gr. 36 mechanical property
| A709 Grade | Thick mm |
Yield [MPa] |
Tensile [MPa] | Elongtation Min % | reduction Min % |
HB | |||
| Steel Plate | Structural steel | ||||||||
| 8in[200mm] | 2in[50mm] | 8in[200mm] | 2in[50mm] | ||||||
| 36[250] | ≤100 | [250]min | 400-550 | 20 | 23 | 20 | 21 | … | … |
| [250]min | 400min | … | … | 20 | 19 | … | … | ||
| 50[345] | ≤100 | 345min | 450min | 18 | 21 | 18 | 21F | … | … |
| 50S[345S] | G | 345-450HI | 450minH | … | … | 18 | 21 | … | … |
| 50W[345W] HPS50W[HPS345W] |
≤100 | 345min | 485min | 18 | 21 | 18 | 21J | … | … |
| HPS70W[HPS485W] | ≤100 | 485min | 585-760 | … | 19K | … | … | … | … |
| 100 [690], 100W [690W],HPS100W [HPS690W] | ≤65 | 690minB | 760-895 | … | 18K | … | … | L | 235-293M |
| 100 [690], 100W [690W], | 65-100 | 620minB | 690-895 | … | 16K | … | … | L | … |
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