Alloy Steel Sheet and Plates

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Thabiso Steel stands out as a reliable manufacturer and supplier of top-notch Alloy Steel Sheets and Plates right in Cape Town, South Africa. Known for their commitment to quality and dependability, this company provides products that adhere to both national and international standards. With a wealth of experience in the steel industry, Thabiso Steel boasts a diverse selection of alloy steel grades, ensuring that their offerings are durable, strong, and versatile enough for a variety of industrial uses. Their cutting-edge processing facilities, combined with a customer-centric approach, make them a go-to choice for clients in construction, engineering, manufacturing, and beyond. Thabiso Steel is dedicated to supplying premium materials that excel in even the toughest environments.

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A387 Low Alloy Steel Plate

ASME SA387 Alloy Steel Sheet

A387 Alloy Steel Plate

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What is Alloy Steel Sheet and Plates?

Alloy Steel Sheets and Plates are crafted from carbon steel blended with a mix of alloying elements like chromium, nickel, molybdenum, manganese, and vanadium. These additions significantly boost strength, hardness, corrosion resistance, and toughness. You can expect impressive mechanical properties, including high tensile strength (up to 850 MPa), excellent yield strength, and solid impact resistance, even in colder conditions. Processes like annealing and quenching further enhance their mechanical performance. The exact composition and properties can vary based on the specific alloy grade (like ASTM A387 or A572), allowing for tailored solutions to meet different mechanical and environmental needs.

Alloy Steel Sheet and Plates Specifications

Specifications	ASTM A387 / ASME SA387
Thickness	1mm-300mm
Width	1000mm, 1219mm, 1500mm, 1800mm, 2000mm, 2500mm, 3000mm, 3500mm, 4050mm etc
Length	2000mm, 2440mm, 3000mm, 5800mm, 6000mm, 12000mm, 15000mm etc
Surface	2B, 2D, BA, NO.1, NO.4, NO.8, 8K, mirror, checkered, embossed, hair line, sand blast, Brush, etching Manufacturer and Supplier
Finish	Hot rolled plate (HR), Cold rolled sheet (CR)

Alloy Steel Sheet and Plates Chemical Composition

	C	Mn	P	S	SI	Cr	Mo
Grade 5	0.15 max	0.3 – 0.6	0.035	0.03	0.5 max	4.00 – 6.00	0.45 – 0.65
Grade 9	0.15 max	0.30 – 0.6	0.03	0.03	1.0 max	8.0 – 10.0	0.9 – 1.1
Grade 11	0.05 – 0.17	0.4 – 0.65	0.035	0.035	0.5 – 0.80	1.0 – 1.5	0.45 – 0.65
Grade 12	0.05 – 0.17	0.4 – 0.65	0.035	0.035	0.15 – 0.4	0.8 – 1.15	0.45 – 0.6
Grade 22	0.05 – 0.15	0.3 – 0.6	0.035	0.035	0.5 max	2.0 – 2.5	0.9 – 1.1

Alloy Steel Sheet and Plates Mechanical Properties

		Tensile Strength (ksi)	Tensile Strength (MPa)	Yield Strength (ksi)	Yield Strength (MPa)	Elongation in 2 inches (%)
A 387 Grade 5	Class 1	60-85	415-585	30	205	18
A 387 Grade 5	Class 2	75-100	515-690	45	310	18
A 387 Grade 9	Class 1	60-85	415-585	30	205	18
A 387 Grade 9	Class 2	75-100	515-690	45	310	18
A 387 Grade 11	Class 1	60-85	415-585	35	240	22
A 387 Grade 11	Class 2	70-90	485-620	45	310	22
A 387 Grade 12	Class 1	50-80	380-550	33	230	22
A 387 Grade 12	Class 2	65-85	450-585	40	275	22
A 387 Grade 22	Class 1	60-85	415-585	30	205	18
A 387 Grade 22	Class 2	75-100	515-690	45	310	18

If You Are Looking To Buy High Quality
Pipes, Sheet, Fittings and Flanges

We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.

Top Manufacturer and Supplier of Alloy Steel Sheet and Plates in Cape Town, South Africa

Jaxon Steel is a trusted manufacturer and supplier of high-quality Alloy Steel Sheet and Plates in Cape Town, South Africa. We specialize in premium steel products, including Alloy Steel, Carbon Steel, Mild Steel and Galvanized Steel, with a strong focus on Carbon Steel Sheet and Plates. Our extensive inventory also includes Pipes, Tubes, Flanges, Forged Fittings and Bars. Committed to fast delivery and exceptional customer service, we use only the finest raw materials to ensure superior strength, durability and performance for critical industrial applications.

Alloy Steel 4340 Plate Size Chart

Size (in inches)	Size (in mm)
.125″	3.18mm
.134″	3.40mm
.156″	3.96mm
.187″	4.75mm
.250″	6.35mm
.312″	7.92mm
.375″	9.53mm
.500″	12.7mm
.600″	15.9mm
.750″	19.1mm
.875″	22.2mm
1″	25.4mm
1.125″	28.6mm
1.250″	31.8mm
1.500″	38.1mm
1.750″	44.5mm
2″	50.8mm
2.500″	63.5mm
3″	76.2mm

4130 Alloy Steel Sheet Weight chart

Thickness	Plate Weight per Unit Area	Density
3/16 inches	0.06000 lbs/in²42.184176 kg/m²	0.315 lbs/in³8.72 g/cm³
1/4 inches	0.08 lbs/in²56.245568 kg/m²	0.315 lbs/in³8.72 g/cm³
3/8 inches	0.121 lbs/in²85.0714216 kg/m²	0.315 lbs/in³8.72 g/cm³
1/2 inches	0.161 lbs/in²113.1942056 kg/m²	0.315 lbs/in³8.72 g/cm³
5/8 inches	0.196 lbs/in²137.8016416 kg/m²	0.315 lbs/in³8.72 g/cm³
3/4 inches	0.235 lbs/in²165.221356 kg/m²	0.315 lbs/in³8.72 g/cm³
7/8 inches	0.274 lbs/in²192.6410704 kg/m²	0.315 lbs/in³8.72 g/cm³
1 inches	0.313 lbs/in²220.0607848 kg/m²	0.315 lbs/in³8.72 g/cm³
1 1/4 inches	0.391 lbs/in²274.9002136 kg/m²	0.315 lbs/in³8.72 g/cm³
1 1/2 inches	0.47 lbs/in²330.442712 kg/m²	0.315 lbs/in³8.72 g/cm³
1 3/4 inches	0.549 lbs/in²385.9852104 kg/m²	0.315 lbs/in³8.72 g/cm³
2 inches	0.627 lbs/in²440.8246392 kg/m²	0.315 lbs/in³8.72 g/cm³
2 1/4 inches	0.705 lbs/in²495.664068 kg/m²	0.315 lbs/in³8.72 g/cm³
2 1/2 inches	0.784 lbs/in²551.2065664 kg/m²	0.315 lbs/in³8.72 g/cm³
2 3/4 inches	0.862 lbs/in²606.0459952 kg/m²	0.315 lbs/in³8.72 g/cm³
3 inches	0.941 lbs/in²661.5884936 kg/m²	0.315 lbs/in³8.72 g/cm³

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Types of Alloy Steel Sheet and Plates

Alloy Steel Hot Rolled Plates

Chrome Moly SA 387 GR 11 CL. 2 Sheet

Alloy Steel Plate ASME SA 387 GR.9 Class 1

Alloy Steel Boiler Sheet

A387 Pressure Vessel Steel Plates

ASME SA 387 GR.5 CL.2 Alloy Steel Plate

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Uses of Alloy Steel Sheet and Plates

Alloy Steel Sheets and Plates from Thabiso Steel are a go-to choice in various industries, thanks to their remarkable strength and durability. In construction, they play a crucial role in structural components, bridges, and support beams. The oil and gas industry counts on them for pipelines, pressure vessels, and offshore platforms. In the automotive and transport sectors, they’re essential for chassis parts and heavy-duty machinery. Energy and power plants utilize them in boilers, turbines, and heat exchangers. Their ability to resist wear, high temperatures, and corrosion makes them perfect for tough environments, ensuring both performance and safety in heavy and precision engineering applications.