Aiman Metals stands out as a top-notch manufacturer and supplier of Stainless Steel 431 Round Bars and Rods, proudly based in Kuala Lumpur, Malaysia. With a strong commitment to providing high-performance stainless steel solutions, Aiman Metals caters to various industries, including marine, aerospace, automotive, and oil & gas. Renowned for their quality, durability, and precision, their 431 round bars and rods are crafted to meet international standards. Thanks to their excellent machining characteristics and resistance to corrosion, these bars are perfect for high-stress applications. Aiman Metals also offers customizable dimensions and quick delivery, making them a reliable choice for stainless steel products across Malaysia and beyond.
Stainless Steel 431 is a martensitic stainless steel alloy that contains 15–17% chromium and 1.25–2.5% nickel. It’s celebrated for its impressive tensile strength, typically ranging from 850 to 1000 MPa, and a yield strength of around 600 MPa, along with excellent toughness. SS 431 can be hardened through heat treatment, which enhances its mechanical performance and wear resistance. It also boasts better corrosion resistance compared to standard martensitic grades, especially in mild marine and industrial settings. This makes it a go-to material for applications where high strength, moderate corrosion resistance, and good machinability are crucial for critical components.
Stainless Steel Round Bar Specification : ASTM A276 / A479, ASME SA276 / A479
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.
| 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 | – |
|
Typical Mechanical Properties at Elevated Temperatures, Hardened at 1010oC and Tempered at 30oC Above Working Temperature |
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|
Tempering Temperature oC |
510 |
570 |
620 |
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|
Working Temperature oC |
480 |
540 |
590 |
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|
Tensile Strengt Mpa |
1350 |
720 |
435 |
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|
Elongation in 50mm % |
15 |
20 |
26 |
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|
Room Temperature Hardness after Test |
HB |
440 |
330 |
280 |
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|
Rc |
47 |
37 |
30 |
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|
Grade |
UNS No |
Old British |
Euronorm |
Swedish SS |
Japanese JIS |
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|
BS |
En |
No |
Name |
||||
|
431 |
S43100 |
431S29 |
57 |
1.4057 |
X17CrNi16-2 |
2321 |
SUS 431 |
|
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 |
Stainless Steel 431 Round Bars and Rods find their way into a variety of applications that demand high strength, hardness, and moderate corrosion resistance. Common uses include pump and valve shafts, marine hardware, fasteners, aircraft components, and automotive parts. Thanks to their good machinability and wear resistance, these bars are perfect for precision engineering and load-bearing structures in corrosive or high-stress environments. They are also frequently utilized in petrochemical equipment, turbines, and machinery in the food industry. Aiman Metals offers 431 round bars in a range of sizes, customized to meet the specific needs of their clients.






We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Aiman Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Kuala lumpur, Malaysia
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