ASTM A588 Grade B Steel — Specifications & Listings

ASTM

High strength low alloy weathering steel, Grade B variant with slightly different chemistry than Grade A. Used for bridges, buildings and exposed structures requiring corrosion resistance without protective coatings.

Category: Mild Steel

Grade Details

Grade	ASTM A588 Grade B
Standard	ASTM
Description	High strength low alloy weathering steel, Grade B variant with slightly different chemistry than Grade A. Used for bridges, buildings and exposed structures requiring corrosion resistance without protective coatings.
Applications

Chemical Composition (%)

C	Mn	Si	P	S	Cu	Cr	Ni	Mo
<=0.20	0.75-1.25	0.15-0.30	<=0.040	<=0.050	0.20-0.40	0.40-0.70	<=0.50	0.02-0.10

Mechanical Properties

tensile_strength	485 MPa min
yield_strength	345 MPa min
elongation	18% min
hardness	140-190 HB

Active ASTM A588 Grade B Listings on M-EX

No active ASTM A588 Grade B listings at this time.