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ASTM A588 / A588M steel

Standard specification for high-strength low-alloy structural steel, up to 50 ksi [345 MPa] minimum yield point, with atmospheric corrosion resistance.

Key words:

steel

Classification:

Steel

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Description

Product introduction

Standard specification for high-strength low-alloy structural steel, up to 50 ksi [345 MPa] minimum yield point, with atmospheric corrosion resistance.
The required ASTM G101 Corrosion Resistance Index must be ≥ 6.0. In addition to the typical application in welded bridges and buildings, the specification is also commonly used in passenger rail cars.

The specifications:
Thickness: 3mm--150mm
Width: 30mm--4000mm
Length: 1000mm--12000mm
Standard: ASTM EN10025 JIS GB

Technical Data

ASTM A588 Chemical Composition

A588 Steel Composition
	Grade A	Grade B	Grade K	Grade C
Carbon	0.19%	0.2%	0.17%	0.17%
Manganese	0.8-1.25%	0.75-1.35%	0.50-1.20%	0.50-1.20%
Phosphorus	0.03%	0.03%	0.03%	0.03%
Sulfur	0.03%	0.03%	0.03%	0.03%
Silicon	0.30-0.65%	0.15-0.50%	0.25-0.50%	0.25-0.50%
Nickel	0.4%	0.5%	0.4%	0.4%
Chromium	0.4-0.65%	0.4-0.7%	0.4-0.7%	0.4-0.7%
Molybdenum	...	...	0.1%	0.1%
Copper	0.25-0.4%	0.2-0.4%	0.3-0.5%	0.3-0.5%
Vanadium	0.02-0.10%	0.01-0.10%	...
Columbium	...	...	0.005-0.05%	0.005-0.05%

Plate Properties

Grade A588 Properties

GRADE	THICKNESS	TENSILE KSI	YIELD KSI	% ELONG. MIN
				8"	2"
A588	.75"THRU 4"	70MIN	50 YP MIN	16	19
	>4"THRU 4"	67MIN	46 YP MIN	-
	>5"THRU 8"	63MIN	42 YP MIN

Properties

Tensile: 70 ksi min (4 inch and under), 67 ksi min (4-5) 63 ksi min (Over 5-8)
Yield: 50 ksi min (4 and under), 46 ksi min (4- 5) 42 ksi min (Over 5-8)
Elongation: 16 percent min in 8 inch 19 percent min in 2 inch (for plates wider than 24 inch)in sheet.
Typical Uses
This steel can be left unpainted making it ideal application including bridges, buildings, and other structures.

About us

Founded in 1997, Jingui Machinery Processing Co., Ltd. is a China-based manufacturer specializing in custom metalworking, machinery manufacturing, precision parts processing, laser cutting, welding, and non-standard equipment manufacturing.

Located in Caizhuang Industrial Park, Laoting County, Tangshan City, our manufacturing facility has a total construction area of approximately 5,500 square meters, supported by dedicated production areas and a team of skilled machining and welding professionals.

Comprehensive Manufacturing Capabilities

Jingui operates a wide range of conventional and CNC manufacturing equipment, including CNC gantry milling machines, CNC machining centers, vertical milling machines, drilling and boring machines, gear hobbing machines, large lathes up to Φ1,600 mm, thread rolling machines, large-format laser cutting machines, CNC cutting machines, plate shearing and bending machines, plate rolling machines, plate flattening machines, a 400-ton hydraulic press, and multiple welding machines.

This equipment enables us to handle a broad range of custom manufacturing requirements, from individual metal components and fabricated parts to large non-standard equipment and complete machinery assemblies.

Our manufacturing capabilities include:

CNC machining and precision parts manufacturing
Laser cutting and CNC cutting
Sheet metal fabrication
Welding and structural fabrication
Casting and machining
Large-part and heavy machining
Non-standard equipment manufacturing
Custom metal components
Machinery assembly and maintenance

Engineering & Product Development

Jingui has developed proprietary products and manufacturing solutions for industrial applications. The grain storage roof sealing support independently developed by our company has been applied in the construction of national grain reserve facilities in China.

We also hold one national invention patent and two utility model patents. These achievements reflect our continued investment in engineering development, manufacturing technology, and product improvement.

From Raw Materials to Finished Products

We provide an integrated manufacturing service covering material procurement, production, machining, fabrication, assembly, installation, inspection, delivery, and after-sales support.

By keeping key manufacturing processes under our own production control, we can respond flexibly to customized requirements while maintaining consistent quality and production efficiency.

Whether you need custom metal parts, fabricated components, precision machining, or non-standard machinery, our engineering and production teams work closely with customers to develop practical manufacturing solutions based on their drawings, specifications, and application requirements.

Building Long-Term Partnerships

With more than 25 years of manufacturing experience, Jingui is committed to providing reliable products, responsive service, and practical manufacturing solutions.

We believe long-term cooperation is built on consistent quality, transparent communication, and dependable delivery. We continue to improve our manufacturing capabilities and develop new products to meet the evolving requirements of industrial customers.

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