If you are looking for hot-rolled SUS431 stainless steel round bars, we offer high-quality round bars suitable for automotive, industrial machinery, and structural applications. Our SUS431 round bars are available in diameters ranging from 6 mm to 150 mm, with standard lengths of 1 to 6 meters, and we also offer custom sizes, precision cutting, and heat treatment services.
GNEE is one of the leading suppliers of 431 stainless steel round bars, also known as Inox 431 round bars in the industry. These bars offer excellent corrosion resistance, capable of withstanding a variety of corrosive substances. Made from martensitic heat-treatable grade AISI 431 stainless steel, these round bars possess outstanding corrosion resistance, torsional strength, high toughness, and superior tensile properties. Our Din 1.4057 stainless steel round bars are specifically designed to withstand the effects of various organic substances, nitric acid, and petroleum products. They provide high tensile strength, high yield strength, and excellent toughness even in the quenched and tempered condition. They are suitable for pump shafts, valve stems, outboard motor drive shafts, and other similar applications.
AISI 431 Stainless Steel Round Bar Specifications
Description |
AISI 431 stainless steel round bar with SGS certificates | |
Standard |
ASTM A276, A484, A479, A580, A582, JIS G4303, JIS G4311, DIN 1654-5,DIN 17440,GB/T 1220 |
|
| Material | 201 304,304L,309S,310S,316,316L,316Ti,317,317L,321,347H,201,202, 410,420,430,etc |
|
| Type | Round,square,hexagonal,flat,angle | |
| Surface | Pickled,Black,Bright,Polishing,Blasting,etc | |
Specifications |
Round bar | Diameter: 2mm~800mm |
| Angle bar | Size: 3mm*20mm*20mm~12mm*100mm*100mm | |
| Square bar | Size: 4mm*4mm~100mm*100mm | |
| Flat bar | Thickness: 2mm~100mm | |
| Width: 10mm~500mm | ||
| Hexagonal | Size: 2mm~100mm | |
| Length | 6m,5.8m,12m or as required | |
| Price Term | EX-Work, FOB, CFR, CIF,CNF | |
| Payment Term | T/T,L/C, Western union | |
| Delivery Time | Normally according to the order quantity | |
UNS S43100 Stainless Steel Round Bars Chemical Composition
| Grade | C | Ni | Si | S | Mn | P | Cr | Mo | |
| SS 431 | min. | 0.12 | 1.25 | - | - | - | - | 15.00 | - |
| max. | 0.20 | 3.00 | 1.00 | 0.03 | 1.0 | 0.04 | 18.00 | - | |
Stainless Steel WERKSTOFF NR. 1.4057 Rods Mechanical Properties
| Grade | Tensile Strength (ksi) min | Elongation (% in 50mm) min | Yield Strength 0.2% Proof (ksi) min | Hardness |
| 431 | 850 | 11 | 635 | 302 |
Heat Treatment of WNR 1.4057 Black Bar
| Forging | Annealing | Tempering | Hardening |
|---|---|---|---|
| 900 – 1200°C | 620 – 660°C | 600 – 800°C | 980 – 1065°C |
How do SS 431 Round Bars/Rods get hardened?
SS 431 Round Bars/Rods are hardened through heat treatment. This process increases their strength while maintaining good flexibility. The alloy also exhibits good resistance to metal polishing.
AISI 431 vs 420 vs 304 Stainless Steel
| Grade | Strength | Corrosion Resistance | Typical Price Level | Typical Use |
|---|---|---|---|---|
| AISI 431 | ★★★★★ | ★★★☆ | ★★★ | Shafts, fasteners |
| AISI 420 | ★★★★☆ | ★★★ | ★★☆ | Tools, blades |
| AISI 304 | ★★☆☆☆ | ★★★★☆ | ★★★☆ | General-purpose |
What is the price of 431 stainless steel round bar per kg?
The price of 431 stainless steel round bars varies considerably, typically ranging from US$1.50 to over US$20 per kilogram. The exact price depends on the diameter, surface finish (polished, ground), order quantity (bulk purchases are cheaper), and the supplier.
Price of Stainless Steel Round Bars ASTM A276 431 : US $900-2000 / Ton (FOB Price)
Price of Stainless Steel ASME SA276 431 Rods : US $900-2000 / Ton (FOB Price)
The price per kg of AISI 431 round bar depends on several key variables:
Bar diameter – larger diameters require longer forging and heat treatment cycles
Heat treatment condition – Q&T bars cost more than annealed bars
Surface finish – peeled or polished bars carry a premium
Order quantity (MOQ) – bulk orders significantly reduce unit price
Market conditions – alloy surcharges and nickel price fluctuations
👉 For accurate pricing, request a quote based on size, quantity, and delivery terms.
At GNEE, 431 stainless steel is available in various forms to meet diverse industrial needs:
Bars and rods (round, square, hexagonal)
Specifications: 431, S43100, 1.4057, SUS431, STS431
Temperature range: -423°F to 1300°F.
Testing and Documentation: Mill Test Certificate, EN 10204 3.1, Chemical Report, Mechanical Report, Destructive Testing Report, Non-Destructive Testing Report, PMI Test Report, Visual Inspection Report, Third-Party Inspection Report, NABL Certified Laboratory Report.
Packaging: Wooden crates, bubble wrap, steel strapping, or packaged according to customer requirements.
