HOT News

• Improper welding of X80 pipeline may cause cracks
• Brief introduction of API X52 pipeline steel
• The difference between PSL1 and PSL2
• Harm of inclusions in X70 pipeline steel
• API 5L pipeline pipe
• X52 steel plate surface quality standards that need to be met
• The basic production process of API 5L X60 pipeline steel
• The key to Q460D steel welding process
• What does the heat treatment of Q690 Steel include?
• Reasons for choosing Q690D steel

High strength A709 steel properties

Posted:2020-12-31 11:24:47

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.