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High strength A709 steel properties

Posted:2020-12-31 11:24:47
A709 steel properties

A709 steel is subject to ASTM A709/A709M standard, the specification for structural steel that is used in bridges. A709 steel includes carbon steel, HSLA steel, quenched and tempered (Q+T) steel. The specifc grades are A709 grade 36, A709 grade 50 and A709 grade 50W, A709 grade 100, A709 grade 100W, etc. A709 steel properties mainly refer to A709 mechanical property.

High strength A709 steel properties - A709 plate mechanical property:
ASTM A709 Yield Strength
(MPa) min.
Tensile Strength
(MPa) min.
Elongation in 8
in. min. %
Elongation in 2
in. min. %
A709 grade 36 250 400 20 23
A709 grade 50 345 450 18 21
A709 grade 50S 345 450 18 21
A709 grade 50W 345 485 18 21
A709 grade HPS 50W 345 485 18 21
A709 grade HPS 70W 485 585-760 - 19
A709 grade 100 690 760-895 - 18
A709 grade 100W 620 760-895 - 16
A709 grade HPS 100W 690 760-895 - 18

A709 steel is often specified with Charpy tests referencing the specific zone or lowest anticipated service temperature. A709 steel Charpy test is specified as non-fracture critical, which is a per-heat test, or fracture critical, which is a per-plate test.
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