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Thabiso Steel is a reputable manufacturer and supplier of high-quality steel products located in Cape Town, South Africa. With a strong focus on quality and customer satisfaction, Thabiso Steel specializes in providing S355JO steel sheets and plates, which are celebrated for their exceptional strength and versatility. The company caters to a diverse array of industries, delivering dependable steel solutions that meet various structural and engineering needs. Supported by a skilled team and advanced manufacturing processes, Thabiso Steel guarantees timely deliveries, competitive pricing, and products that comply with international quality standards, solidifying its position as a leader in the regional steel market.

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Mild Steel RTJ Flanges

Mild Steel Forged Flanges

Mild Steel Plate Flanges

What is Mild Steel Flanges?

S355JO steel sheets and plates are classified as non-alloy structural steels under the EN 10025-2 standards. Their chemical makeup generally consists of a maximum of 0.20% carbon, 1.60% manganese, and minimal amounts of phosphorus and sulfur. This low carbon content enhances their weldability. In terms of mechanical properties, S355JO steel boasts a minimum yield strength of 355 MPa and tensile strength that ranges from 470 to 630 MPa. The “JO” designation indicates a minimum impact energy of 27J at 0°C, ensuring that the steel remains tough even in colder temperatures. This combination of strength, ductility, and impact resistance makes it perfect for demanding structural applications.

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Mild Steel Flanges Specification

Size Ranges	From 1/2 inch (i.e. 15 NB) upto 48 inch (i.e. 1200NB)
Standards	ASME \| BS \| DIN \| ANSI \| GOST \| EN Flanges
JIS Standards	5 K, 10K, 16K, 20 K, 30K, 40K, 63 K
Pressure Classes	Cl 150, Class 300, Cl. 400, 600, Class 900, Cl 1500 and 2500 \| PN 6, PN16, PN 10, PN64
EN Standard	6Bar, 10 Bar, 16Bar, 25 Bar, 40Bar

Mild Steel Flanges Chemical Composition

Compound	Contains
Manganese, Mn	0.60 – 0.90 %
Sulfur, S	≤ 0.050 %
Phosphorous, P	≤ 0.040 %
Carbon, C	0.14 – 0.20 %
Iron, Fe	98.81 – 99.26 % (as remainder)

Mild Steel Flanges Mechanical Properties

Properties	Metric	Imperial
Hardness, Rockwell B (Converted from Brinell hardness)	71	71
Tensile Strength, Yield	370 MPa	53700 psi
Poissons Ratio (Typical For Steel)	0.290	0.290
Tensile Strength, Ultimate	440 MPa	63800 psi
Elongation at Break (In 50 mm)	15.0 %	15.0 %
Reduction of Area	40.0 %	40.0 %
Modulus of Elasticity (Typical for steel)	205 GPa	29700 ksi

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 Mild Steel Flanges in Cape Town, South Africa

ThabisoSteel is a top manufacturer and supplier of high-quality Mild Steel Flanges products in Cape Town, South Africa. Specializing in steel solutions, we provide a wide range of products, including Carbon Steel, Alloy Steel, Mild Steel and Galvanized Steel. Our offerings include Pipes, Tubes, Flanges, Pipe Fittings, Forged Fittings, Sheets and Plates. Known for our reliable delivery and superior customer service, we are committed to offering top-tier steel materials that ensure durability and performance across a wide range of industrial applications. We strive to meet the highest standards, making us a trusted partner for all your steel needs.

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Types of Mild Steel Flanges

Mild Steel Socket Weld Flanges

Mild Steel Long Weld Neck Flanges

Mild Steel Lap Joint Flanges

Mild Steel Ring Type Joint Flange

Mild Steel Weld Neck Flanges

Mild Steel Blind Flanges

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Uses of Mild Steel Flanges

S355JO steel sheets and plates are widely utilized across various industries due to their remarkable strength, weldability, and impact resistance. They are commonly used in constructing bridges, buildings, offshore platforms, and heavy machinery, supporting structural integrity under different loads and conditions. Additionally, this steel grade is employed in manufacturing cranes, truck frames, pressure vessels, and wind turbine structures. Its versatility makes it suitable for both indoor and outdoor applications, especially in engineering projects that require durability and performance under stress. Thabiso Steel offers these products in a range of dimensions, customized to meet the specific needs of infrastructure and industrial projects.