If you are looking for engineering stainless steel plates that combine high strength, wear resistance, and reliable corrosion resistance, we offer ASTM A240 Grade 431 Hot Rolled Stainless Steel Plate, specifically designed for high-load, high-impact, and high-mechanical stress applications.

Our ASTM A240 431 hot-rolled stainless steel plates are manufactured using a mature and stable hot-rolling process, resulting in dense material structure and uniform thickness. Standard thicknesses range from 3mm to 60mm, and we support custom cutting and subsequent machining. Compared to austenitic stainless steel, 431 plates offer significant advantages in strength, impact resistance, and fatigue life, while still possessing good resistance to atmospheric and mild corrosive environments. They are suitable for applications such as pump shafts, valves, bolts, mechanical components, petroleum equipment, and aerospace components.

In terms of quality assurance, we implement comprehensive quality control throughout the entire process, including chemical composition analysis, mechanical property testing (tensile strength, yield strength, hardness), dimensional and flatness inspection, and surface quality inspection. Material test certificates (MTC) are provided with each shipment, and third-party inspection is supported, ensuring that the product fully complies with the ASTM A240 standard.

ASTM A240 Grade 431 Hot Rolled Stainless Steel Plate

SS 431 annealed plates

431 Stainless Steel Sheet Manufacturing Process

431 Stainless Steel Sheet Manufacturing Process

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Specifications

Specifications	ASTM A240 / ASME SA240
Width	1000mm / 1219mm /1250mm / 1500mm / 2000mm
Length	2000 mm / 2440 mm / 2500 mm / 3000 mm / 6000 mm
Thickness	5mm to 50mm
Hardness	Soft, Hard, Half Hard, Quarter Hard, Spring Hard etc.
Finish	Hot rolled plate (HR), Cold rolled sheet (CR), 2B, 2D, BA NO(8), SATIN (Met with Plastic Coated)

SS 431 Plate Composition

Grade

431

min.

max.

–

0.20

–

0.04

–

0.03

1.25

2.50

SS 431 Plate Mechanical Properties

Tempering Temperature (°C)	Tensile Strength (MPa)	Yield Strength 0.2% Proof (MPa)	Elongation (% in 50mm)	Hardness Brinell (HB)	Impact Charpy V (J)
Annealed *	862	655	20	285 max	–
204	1345	1055	20	388	50
316	1295	1035	19	375	53
427	1350	1080	19	388	#
538	1140	965	19	321	#
593	1015	770	20	293	64
650	960	695	20	277	84

SS 431 Plate Physical Properties

Grade	Density (kg/m3)	Elastic Modulus (GPa)	Mean Coefficient of Thermal Expansion (μm/m/°C)			Thermal Conductivity (W/m.K)		Specific Heat 0-100°C (J/kg.K)	Electrical Resistivity (nΩ.m)
			0-100°C	0-315°C	0-538°C	at 100°C	at 500°C
431	7800	200	10.2	12.1	–	20.2	–	460	720

If you have any requirements for the above items, please feel free to place an order. GNEE has a large inventory of popular 431 stainless steel products for you to choose from. These can be processed into various practical product forms, including plates, coils, tubes, bars, and wires. For detailed chemical composition information and free samples, please contact our factory immediately. We offer competitive prices and excellent service.

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SS 431 Plate Supplier

GNEE conducts multiple material tests on SS 431 stainless steel plates to ensure product quality and production efficiency before delivery to customers. These tests include mechanical property testing, flexibility testing, hardness testing, micro and macro structural testing, flaring testing, flattening testing, pitting corrosion resistance testing, PMI testing, intergranular corrosion testing, and chemical composition analysis.

Highest quality GNEE packaging and shipping

To ensure that SS 431 steel plates maintain their quality before reaching their destination, the industry employs efficient packaging methods to prevent serious damage. The steel plates are first wrapped in plastic bags and then placed in large wooden crates, boxes, or pallets. These packaging materials are fumigated and free of other impurities.