what does jr means in steel grade

Structural Steel Sub-Grades JR, J0 & J2 Does It Matter?2.0 Sub-Grades JR, J0, J2. Steel sub-grades indicate the Charpy impact value required to prevent brittle fracture. JR – Longitudinal Char ...

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asme sa572 grade 55 mild steel

ASTM A572 Grade 50, 55, 60, 65 Steel Plates Specification ASTM A572 steel plate is high strength low alloy (HSLA) structural steel integrated with alloy content of columbium-vanadium, with Grade 42, ...

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0 45mm p steel coil for sheet

0.45mm Matte Surface Prepainted Galvanized Steel CoilHigh quality 0.45mm Matte Surface Prepainted Galvanized Steel Coil from China, China's leading Matte Surface Prepainted Galvanized Steel Coil pro ...

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