ASTM A 709/A 709M A709 Grade HPS 50W is a kind of weathering steel plate with Cr,Ni,Mo alloy when rolling. The low alloy steel plate A709 GR HPS 50W shall have an atmospheric corrosion resistance index of 6.0 or higher calculated from the heat analysis in according to steel guide G 101-predictive method based on the date of larabee and Coburn.When properly exposed to the atmosphere,these weathering steel sheet A709 Grade HPS 50W can be used bare and unpainted.

Technical Requirements & Additional Services:
High tension test
Low temperature impacting test
Simulated post-welded heat treatment (PWHT)
Issued Orginal Mill test certificate under EN 10204 FORMAT 3.1/3.2
When cooper steel is specified for A709 Gr36, the content Cu≥0.20%
Shot blasting and Painting,Cutting and welding as per end user’s demands

Overview:
Common steel plate grade used primarily for the manufacture of bridges.
Heavy thicknesses (3-inches or thicker) available at most Steel distribution centers.
Available in standard grades: 36, 50 and 50W.
Available in high-performance grades: HPS 50W and HPS 70W.
Customers can specify A709 grades to meet Charpy test requirement for specific zones and climate.