Grade B steel is a low & intermediate tensile strength hot Rolled steel in the form of plates for general Intermediate Strength applications. Grade B is a material Grade and designation defined in ASTM A283 standard. ASTM A283 is an American material standard for hot Rolled steel plates for general intermediate strength usage. Grade B steel is relatively higher in strength than Grade A steel of the same standard.
Dimensional Characteristics of Carbon A283 Grade B Steels: The applicable thickness for this Grade B material as defined in the ASTM A283 starts from 6 mm to 50 mm. The width is normally from 600 mm to 2000 mm.
Mechanical Properties of Grade B Steel: The tensile strength of the Grade B Steels is expressed in Newton per millimeters and it must be at-least 345 N/mm2 (MPa). The yield strength is minimum 185 N/mm2 (MPa). The minimum percentage ranges for elongation is 28%.
Mechanical Properties of ASTM A283Gr.B high strength steel plate
A283 Grade B Mechanical Property |
||||
Grade |
Thickness |
Yield |
Tensile |
Elongation |
A283 GR.B |
mm |
Min Mpa |
Mpa |
Min % |
t≦50 |
345-450 |
185 |
28 |
|
50<t≦200 |
345-450 |
185 |
25 |
ASTM A283 GR.B super heavy steel plates chemical composition (%) :
Composition |
C ≤ |
Mn ≤ |
P ≤ |
S ≤ |
Si |
A283Grade B |
0.17 |
0.90 |
0.035 |
0.04 |
0.40 |
For structural steel A283 Grade A, the minimum yield strength is 165 Mpa, tensile between 310 and 415. And for carbon steel sheet A283 Grade B,the yield strength shall be above 185 Mpa,tensile strength within 345 to 450 Mpa.
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