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Golden Steel Material is a premier ISO-certified stockist based in Al Jubail. We supply high-performance pipes, fittings, valves, and flanges to the Oil & Gas and Industrial sectors across Saudi Arabia and the GCC.

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Al Jubail 35526, Saudi Arabia

ASTM A588 GR.B Plates

Material Grade: ASTM A588 Grade B / ASME SA588

Material Type: Heavy-Duty Weathering Structural Steel

Structural Strength: 50,000 psi (345 MPa) Minimum Yield

Corrosion Benefit: Protective Patina for Lifetime Durability

Efficiency Advantage: Eliminates Maintenance & Painting Costs

Fabrication Property: Excellent Weldability in Thick Gauges

Thickness Range: 6.0 mm to 200 mm

Primary Industries: Bridge Girders, Heavy Frames, & Civil Engineering

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ASTM A588 Grade B Plates are high-strength, low-alloy structural steels engineered specifically for applications where heavy section thicknesses and superior atmospheric corrosion resistance are paramount. Under the ASTM A588 specification, Grade B is chemically balanced to maintain a robust minimum yield strength of 50,000 psi (345 MPa) even in thicker plates. This grade is distinguished by its ability to develop a dense, protective oxide patina upon exposure to the elements. This self-healing layer acts as a permanent barrier, shielding the structural core from moisture and oxidation, effectively eliminating the need for external protective coatings or painting.

The primary technical advantage of A588 Grade B is its exceptional longevity in high-stress outdoor environments. Because the material manages its own surface protection, it provides a maintenance-free structural solution that significantly reduces the total lifecycle cost of infrastructure projects. It is the industry standard for heavy-duty bridge girders, highway overpasses, rail cars, and large-scale industrial frames. By utilizing ASTM A588 Grade B, engineers can achieve a high level of structural safety and fatigue resistance, while the material's evolving deep-brown finish provides a natural, aesthetic maturity that integrates flawlessly with the surrounding environment.

ASTM A588 GR.B Plates Features

» High-Strength Structural Integrity: Provides a robust minimum yield strength of 50,000 psi (345 MPa), ensuring safe and reliable performance in heavy load-bearing infrastructure.
» Atmospheric Corrosion Shield: Specifically alloyed to offer significantly higher corrosion resistance than standard carbon steel by forming a protective, self-healing oxide patina.
» Heavy-Section Reliability: Chemically optimized to maintain consistent mechanical properties and strength even in thicker plate gauges, ideal for massive bridge girders.
» Maintenance-Free Service Life: Eliminates the long-term costs of sandblasting and painting, as the weathered surface acts as its own permanent protective coating.
» Exceptional Weldability: Designed for easy joining with standard industrial welding processes, ensuring high-integrity connections in complex structural frameworks.
» Superior Notch Toughness: Engineered to resist brittle fracture and handle high mechanical stress, even in cold climates or under dynamic loading conditions.
» Aesthetic Maturity: Features a distinctive deep-brown, textured finish that develops naturally over time, popular for its modern industrial and architectural appeal.
» Sustainable Engineering: Supports environmentally friendly construction by removing the need for VOC-emitting paints and being fully recyclable at the end of its service life.

ASTM A588 GR.B Plates Specification

Standards

ASTM: A588 Grade B
ASME: SA588 Grade B
Type: HSLA Weathering
Classification: Weather-Resistant Steel

Chemistry

Carbon (C): 0.20% Max
Manganese (Mn): 0.75% - 1.35%
Chromium (Cr): 0.40% - 0.70%
Vanadium (V): 0.01% - 0.10%

Strength

Yield Strength: 345 MPa (Min)
Tensile Strength: 485 MPa (Min)
Elongation: 21% (Min)
Impact Resistance: Optimized Notch Toughness

Fabrication

Welding: Superior (Thick Sections)
Condition: Hot Rolled / Normalized
Cutting: Plasma / Flame / Laser
Forming: Good Cold & Hot Forming

Dimensions

Thickness: 6 mm to 200 mm
Width: Up to 3500 mm
Length: Up to 15000 mm
Profiles: Custom Cut-to-Size

Quality

MTC: EN 10204 3.1 / 3.2
Compliance: NACE MR0175 (Optional)
Surface: Cleaned Mill Finish
Origin: Tier-1 Mill Certified

ASTM A588 GR.B Plates Detailed Specifications

Property	Specification
Specifications	ASTM 588 GR.B
Width	from 750mm to 1500mm
Length	upto 12,000mm
Thickness	from 0.8 mm to 50mm
Type	Weathering Steel / Corten Steel

ASTM A588 GR.B Plates Chemical Composition

Grade	C	Si	Mn	P	S	Ni	Cu	Cr	N	V
ASTM A588 GR.B	0.20 Max	0.15-0.50	0.75-1.35	0.04	0.05	0.050	0.20-0.40	0.40-0.70	0.01	0.01-0.10

ASTM A588 GR.B Plates Mechanical Properties

Grade	Thickness	Yield Strength ReH[N/mm2]transv.min	TensileStrength Rm[N/mm2]transv
ASTM A588 GR.B	0mm-100mm	340 KPa	480 KPa
	102mm-127mm	320 KPa	460 KPa
	127mm-203mm	290 KPa	430 KPa

Industrial Locations & Keywords

Industrial Locations & Keywords
Riyadh Industrial Cities (1st, 2nd, 3rd & Sudair)
Jeddah Industrial Cities (1st, 2nd & 3rd)
Dammam Industrial Areas (1st, 2nd & 3rd)
Jubail Industrial City
Yanbu Industrial City
Rabigh Industrial City
Al Khobar Industrial Area
Al Ahsa Industrial City
Madinah Industrial City
Makkah Industrial City
Taif Industrial City
Tabuk Industrial City
Jazan Industrial City
Industrial supplier in Saudi Arabia
Pipe fittings supplier in Jubail / Dammam / Riyadh
Flange and valve supplier Saudi Arabia
Fast delivery industrial materials KSA