What's the heat treatment of A299 Grade B steel?

A299 Grade B Steel Plate Heat Treatment
ASTM A299 Grade B plates 2 inch [50mm] and under in thickness are normally supplied in the as-rolled condition. Plates may be ordered normalized or stress relieved, or both. A299 Gr.B steel plates products over 2 inch  [50mm] in thickness shall be normalized. 

ASTM A299 Grade B Steel Chemical Requirements.
Grade
The Composition (by weight, heat analysis, %)
Carbon, max.
Silicon
Manganese
Phosphous, max.
Sulfur, max.
A299 Gr.B
0.28
0.15-0.40
0.90 -1.50
0.025
0.025
Carbon Equivalent: Ceq = 【C+Mn/6+(Cr+Mo+V)/5+(Ni+Cu)/15】%


ASTM A299 Grade B Steel Mechanical Properties


Materail


Yield strength Min. Mpa[ksi]
Yield strength Min. Mpa[ksi]
Tensile strength
Elongation in 8 in.
Elongation in 2 in.
 thickness ≦25mm
thickness>25mm
Mpa[ksi]
Min, %
Min, %
A299 Gr.B
290[42]
275[40]
515-655 [75-95]
16
19

ASTM A299 Gr.B Carbon Steel Plates Size

Thickness: 3-150mm
Width: 1220-4200mm
Length: 5000-18000mm
Coils available: 1.2 to 25mm

ASTM A299 Grade B steel is a manganese-silicon carbon steel plate for use in welder boilers and other pressure vessels.
Done is better than perfect.

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