A302 GR.B steel is under standard SA-302/SA-302M. A302 GR.B is a kind of chromium-manganese-silicon alloy steel and it is usually delivered at normalized condition and UT test in accordance with A578 Level C. The equivalent steel grade of A302 GR.B is UK Gr.27.31, and the certificate of A302 GR.B steel plates should be in accordance with EN 10204 3.1 or EN 10204 3.2.
A302 Grade B steel inspection and tests:
Ultrasonic Examination, Product Analysis, Simulated pos-weld heat treatment of mechanical, Maximum Tensile strength, Drop weight test, Reduction of area measurement and test coupons, Charpy V notch impact test for structural shapes.
A302 GR. B steel chemical compositions,%
C 0.25max
Si 0.13-0.45
Mn 1.07-1.62
P 0.035max
S 0.035max
Mo 0.41-0.64
Tensile strength, [550-690] MPa
Yield strength, min [345] MPa
Elongation in 8 in. [200 mm], min 15%
Elongation in 2 in. [50 mm], min, 18 %
Katalor can supply A302 GR.B steel plates at standard specification or special specificarions, and we can do deep processing work for A302 GR.B steel plates as your per demanding, such as cutting, cold bending, drilling, welding etc. So we can process the A302 GR.B steel plates into A302 GR.B steel machining parts. If you have the demand , please send us the drawings, our professional engineers can change your paper drawings into 3D drawings and give you the technical support.
