Carbon Steels A709 Grade 50 is stocked by 13 North American distributors and produced by 4 large mills. Distributors will offer small quantity buys while mills will generally only sell large quantities, with delivery times anywhere from 10 to 50 weeks depending on size and form required
This material is stocked primarily in Flat Rolled Products by 11 distributors but is also available to a lesser extent in Structurals, and Bar Products.
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Specifications
The following specifications cover Carbon Steels A709 Grade 50
No Specifications.
Property Results
Chemistry Data : [top]
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MSO currently has no data available for this grade.
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Principal Design Features
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ASTM A709 covers the requirements for structural steel for bridges. Grade 50 steel of this specification requires a minimum yield strength of 50 ksi.
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Applications
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Used as structural members in bridge building or for similar structures.
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Machinability
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Machinability of Grade 50 steel is fair. It is an alloy steel and thus tougher to machine than ordinary plain carbon steel. Grade 50 behaves similar to AISI 8615 alloy steel in regard to machining.
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Forming
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Grade 50 steel may be formed by conventional methods but requires more force than for forming of plain carbon steels.
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Welding
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This is a weldable steel by all of the conventional methods.
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Heat Treatment
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Grade 50 steel is used in the "as supplied" condition. Other grades of steel covered by this specification may require heat treatment at 1700 F and water quench followed by tempering, but that is not required for Grade 50.
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Forging
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No data. The product forms supplied are such that subsequent forging is not done.
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Hot Working
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No data, although the steel may be hot worked if needed. Contact the supplier for information.
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Cold Working
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Grade 50 steel may be cold worked by conventional methods as it has good ductility.
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Annealing
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Not applicable per this specification.
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Tempering
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Not applicable to Grade 50 steel -- tempering is done at 1150 to 1200 F for other grades.
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Hardening
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Hardens due to cold working.
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Other Comments
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Grade 50 steel is similar to AISI 8614 low alloy steel in physical and mechanical properties. Grade 50 must meet minimums of 50 ksi yield, 65 ksi tensile and 21% elongation.
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Physical Data : [top]
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Density (lb / cu. in.)
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0.284
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Specific Gravity
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7.9
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Specific Heat (Btu/lb/Deg F - [32-212 Deg F])
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0.105
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Melting Point (Deg F)
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2750
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Thermal Conductivity
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360
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Mean Coeff Thermal Expansion
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6.6
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Modulus of Elasticity Tension
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30
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Modulus of Elasticity Torsion
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11
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Mechanical Data : [top]
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MSO currently has no data available for this grade.
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Videos :
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MSO currently has no videos available for this grade.
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Disclaimer
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This publication may include technical inaccuracies or typographical errors. Changes may be periodically made to the information herein.
