ASTM A709 Grade 50 steel is carbon and high-strength low alloy steel.
ASTM A709 Grade 50 steel Specification for Structural Steel for Bridges.
ASTM A709 Grade 50 material chemical composition,max %
| C | Mn | P | S | Si |
| 0.23 | 1.35 | 0.04 | 0.05 | 0.40 |
ASTM A709 Grade 50 structural steel mechanical properties
| Grade | Steel plate thickness,mm | Section steel thickness,mm | Yield strength [mpa] | Tensile strength [mpa] | Elongation min % | |||
| Steel plate | Section steel | |||||||
| 8in[200mm] | 2in[50mm] | 8in[200mm] | 2in[50mm] | |||||
| 50 | ≤100 | all | [345]min | 450min | 18 | 21 | 18 | 21 |
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