Anucha Metals, located in Bangkok, Thailand, is a reliable manufacturer and supplier of Stainless Steel 431 Bars and Rods, serving a range of industrial needs. SS 431 is a martensitic stainless steel grade recognized for its excellent toughness, corrosion resistance, and high tensile strength. It is particularly suitable for parts that need to resist chemical attack and moderate heat. With state-of-the-art manufacturing facilities, Anucha Metals guarantees precise dimensions, high-quality finishing, and compliance with global standards. Stainless Steel 431 Bars/Rods are widely utilized in the chemical, food processing, marine, and engineering industries, offering performance, durability, and reliable service life.
Stainless Steel 431 Bars/Rods include chromium (15–17%), nickel (1.25–2.5%), and controlled carbon content. This mix offers better corrosion resistance compared to other martensitic grades while keeping high tensile strength. Mechanical properties include tensile strength between 850–1000 MPa and yield strength around 600 MPa. With about 15–20% elongation, they show good toughness and hardness. SS 431 is magnetic and can be heat-treated for increased strength. It also resists mild chemicals and corrosive environments, making it suitable for mechanical, structural, and marine applications.
Dimensions : EN, DIN, JIS, ASTM, BS, ASME, AISI
Standard : ASTM A276, ASTM A479
Material Grade : Stainless Steel 431 (UNS S43100)
Stainless Steel 431 Round Bars : Outside Diameter in the range of 4mm to 500mm
Stainless Steel 431 Bright Bars : Outside Diameter in the range of 4mm to 100mm
Stainless Steel 431 Hex Bars : 18mm – 57mm (11/16″ to 2-3/4″)
Stainless Steel 431 Square Bars : 18mm – 47mm (11/16″ to 1-3/4″)
Stainless Steel 431 Flats : 1/2” to 10” in thickness range of 2mm to 150mm, Custom Size Stainless Steel Flats available
Length : 1 to 6 Meters, Custom Cut Lengths
Form : Round, Square, Hex (A/F), Rectangle, Billet, Ingot, Forging Etc.
Finish : Black, Bright Polished, Rough Turned, NO.4 Finish, Matt Finish, BA Finish
| 431 | Max | Min |
| C | 0.20 | – |
| Cr | 17.00 | 15.00 |
| Fe | Balance | – |
| Mn | 1.00 | – |
| Ni | 2.50 | 1.25 |
| P | 0.040 | – |
| S | 0.030 | – |
| Si | 1.00 | – |
| Element | SS 431 |
| Density | 0.2800 lb/inch³ |
| Electrical Resistivity | 70° Ohms (circ mil./ft.) |
| Modulus of Elasticity | 29.0 X 10^3 |
|
Grade |
UNS No |
Old British |
Euronorm |
Swedish SS |
Japanese JIS |
||
|
BS |
En |
No |
Name |
||||
|
431 |
S43100 |
431S29 |
57 |
1.4057 |
X17CrNi16-2 |
2321 |
SUS 431 |
Stainless Steel 431 Bars and Rods are ideal for applications requiring high strength and corrosion resistance. They are commonly used in marine, aerospace, automotive, and engineering industries for manufacturing shafts, fasteners, valve components, and other high-strength parts exposed to harsh environments.
Stainless Steel 431 offers a combination of high strength, excellent corrosion resistance, and good wear resistance, making it suitable for demanding applications. Unlike other grades, it has a higher hardness and is often used where mechanical performance and toughness are critical.
Stainless Steel 431 Bars/Rods are widely used in industries that require strength and corrosion resistance. In marine engineering, they are employed for propeller shafts, pump parts, and fasteners because of their seawater resistance. In chemical plants, they are used in equipment that comes into contact with mild chemicals and solvents. Aerospace and automotive industries utilize them in high-strength components such as valve parts, shafts, and gears. SS 431 is suitable for surgical instruments, kitchen tools, and food processing equipment due to its hygienic qualities. Its balance of strength, hardness, and corrosion resistance makes it versatile for various engineering and structural uses.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Anucha Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Bangkok, Thailand
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