Luois Metals is a trusted name in the manufacturing and supply of Stainless Steel 431 flat bars, proudly located in Houston, USA. This type of stainless steel is martensitic, recognized for its impressive tensile strength, outstanding corrosion resistance, and toughness, even when hardened. At Luois Metals, we create precision-ground 431 flat bars that comply with ASTM A276 and A479 standards. These bars are perfect for structural and mechanical applications that require both durability and resistance to corrosion. We provide customized sizes, thicknesses, and finishes tailored to the needs of industries like marine, aerospace, chemical processing, and engineering.
Stainless Steel 431 flat bars consist of 15.5–17.5% chromium, 1.25–2.5% nickel, and a carbon content of up to 0.2%. This alloy can be heat-treated to achieve remarkable mechanical properties, boasting tensile strength up to 850 MPa and yield strength around 520 MPa. It also features good hardness, moderate machinability, and fair weldability. Stainless Steel 431 is magnetic and performs well in high-stress, mildly corrosive environments. Its hardening capability makes it ideal for components that need to bear heavy loads and resist wear.
Dimensions : ASTM, ASME
Standard : ASTM / ASME SA A276, A479, ASTM A493
Length : Random, Fix & Cut Length
Size : 20MM to 150MM
| ement | C | Cr | Mn | Ni | P | S | Si |
| SS 431 | 0.20 | 17.00-15.00 | 1.00 | 2.50-1.25 | 0.040- | 0.030 | 1.00 |
| Element | Density | Electrical Resistivity | Modulus of Elasticity |
| SS 431 | 0.2800 lb/inch³ | 70° Ohms (circ mil./ft.) | 29.0 X 10^3 |
| Flat Bar | ||
|---|---|---|
| Size(mm) | WT PER FEET IN KGS | WT PER MTR IN KGS |
| 16 | 0.49 | 1.60 |
| 18 | 0.62 | 2.02 |
| 20 | 0.76 | 2.49 |
| 22 | 0.92 | 3.02 |
| 25 | 1.19 | 3.90 |
| 28 | 1.49 | 4.89 |
| 28 | 1.49 | 4.89 |
| 30 | 1.71 | 5.61 |
| 32 | 1.95 | 6.38 |
| 36 | 2.46 | 8.08 |
| 38 | 2.74 | 9.00 |
| 40 | 3.04 | 9.97 |
| 45 | 3.85 | 12.62 |
| 50 | 4.75 | 12.62 |
| 56 | 8.96 | 19.55 |
| 60 | 6.84 | 22.44 |
| 65 | 8.03 | 26.34 |
| 70 | 9.31 | 30.54 |
| 75 | 10.69 | 35.06 |
| 80 | 12.16 | 39.89 |
| 90 | 15.39 | 50.49 |
| 100 | 19 | 62.34 |
Stainless Steel 431 flat bars find extensive use in industries such as marine, aerospace, defense, oil & gas, and chemical processing, where components face stress, corrosion, and wear. Common applications include pump shafts, marine fittings, valve plates, structural frames, fasteners, brackets, and automotive parts. These bars are particularly well-suited for high-strength applications that also require some level of corrosion resistance. The flat bar shape provides excellent versatility for fabrication and machining. Luois Metals offers SS 431 flat bars in customized sizes and tolerances to meet the specific demands of advanced industrial 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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