Luois Metals, located in Houston, USA, is a trusted manufacturer and supplier of top-notch ST 52.3 Round Bars, which are widely utilized in structural, engineering, and fabrication sectors. ST 52.3 is a low alloy, high-strength structural steel celebrated for its remarkable toughness, weldability, and machinability. It meets DIN 17100/EN 10025 standards and is ideal for applications that demand high load-bearing capacity and dynamic strength. Luois Metals provides ST 52.3 round bars in various diameters and custom lengths, featuring smooth surface finishes to cater to the needs of construction, automotive, heavy equipment manufacturing, and mechanical applications.
ST 52.3 Round Bars generally consist of 0.20–0.22% carbon, 1.60% manganese, along with small amounts of silicon, phosphorus, and sulfur, which enhance their tensile strength and ductility. This material boasts a tensile strength of 490–630 MPa, yield strength of at least 355 MPa, and an elongation of about 22%, depending on size and heat treatment. ST 52.3 is known for its excellent weldability and is often supplied in a normalized state to ensure consistent properties. It’s particularly well-suited for machined components and load-bearing parts that face dynamic forces, vibrations, and impacts.
Alloy 20 Round Bar Specification : ASTM B473 , ASME SB473
Dimension Standard : EN, DIN, JIS, ASTM, BS, ASME, AISI
Size : 14mm-300mm
Thickness : 50 mm to 6000 mm Long
Length : 1 To 6 Meters, Custom Cut Length
Form : Round, Square, Hex(A/F), Rectangle, Billet, Ingot, Forging Etc.
| Carbon Steel | C | Si | Mn | P | S | Cu | N |
| ST 52 | 0,22 | 0,55 | 1,60 | 0,030 | 0,030 | 0,55 | 0,012 |
| The final delivery condition | Cold drawn(Mandatory) BK1） | Cold drawn(Soft) BKW1） | Cold Drawn and Stress Release (BKS) | Anneal (GBK)1） | Normalizing (NBK)1） | |||||||||
| Kinds of Steel | Tensile | Elongation | Tensile | Elongation | Tensile | Yield point | Elongation | Tensile | Elongation | Tensile | Yield point | Elongation | ||
| Steel grade | Material number | No less than | ||||||||||||
| Rm | A5 | Rm | A5 | Rm | ReH | A5 | Rm | A5 | Rm | ReH2) | A5 | |||
| N/mm2 | % | N/mm2 | % | N/mm2 | N/mm2 | % | N/mm2 | % | N/mm2 | N/mm2 | % | |||
| St52 | 1.0580 | 640 | 4 | 580 | 7 | 580 | 420 | 10 | 490 | 22 | 490~630 | 355 | 22 | |
|
DIN |
EN |
JIS |
ISO |
ASTM |
GB |
|
|
ST52-3 |
S355JR |
SM490A |
FE510B |
E36-2 |
A572Gr.50 |
Q345B |
ST 52.3 Round Bars find extensive use in construction, automotive, general engineering, and machinery manufacturing due to their impressive strength-to-weight ratio and dependable performance under stress. They are commonly used in hydraulic cylinder components, crane parts, axles, shafts, connecting rods, and welded structures. In the construction industry, these bars are essential for bridge components, frameworks, and pressure vessels where both strength and formability are crucial. Their excellent machinability and weldability make them perfect for precision machining, fabrication, and automated production lines. ST 52.3 is a go-to material for cost-effective and durable solutions in various applications.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Louis Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Houston, USA
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