431 Stainless Steel Bars, UNS S43100 Round Bars, Stainless Steel S43100 Rods, ASTM A276 SS 431 Bright Bar Manufacturer, Stainless Steel 431 Flat Bars, Stainless Steel 1.4057 Hollow Bar, SS 431 Square Bar, Werkstoff Nr. 1.4057 Bars, Stainless Steel 431 Round Bar, 431 SS Forged Bar Manufacturer in India
Jade Alloys is a Stainless Steel 431 round bar manufacturer and supplier in India. Grade 431 is a martensitic stainless steel. Unlike the common 304 and 316 grades, it can be hardened and tempered by heat treatment. This gives it very high tensile strength and excellent torque strength. Its mix of high chromium and low nickel also holds up well against the atmosphere, mild marine conditions and many corrosive media. That makes 431 a first choice for shafts, bolts and fasteners, pump and valve parts and other high-stress components.
We stock 431 round bars from 4 to 500 mm diameter, in rolled and forged condition. We also supply it as a bright bar, hex bar, square bar, flat bar and threaded bar. Every bar is made to ASTM A276 and A479 under UNS S43100 and Werkstoff 1.4057. It is part of our wider stainless steel round bar range. Each order ships with an EN 10204 3.1 mill test certificate and a PMI report, and we export to the Gulf, Southeast Asia and Europe.
What is Stainless Steel 431 Round Bar
Stainless Steel 431, also known as UNS S43100 or 1.4057, is a martensitic grade designed for strength. It is typically supplied hardened and tempered, which develops tensile strength from roughly 850 up to 1000 MPa or more. The high chromium content gives better corrosion resistance than most other martensitic grades, while the small nickel addition improves toughness. Because of its high yield strength it is not suited to heavy cold working, but it machines and heat treats well, and it is magnetic in all conditions. These properties make 431 bar the standard choice for shafts, fasteners, turbine and pump parts that must carry load in mildly corrosive service.
Quick Section Links
- Stainless Steel 431 Round Bar Specification
- SS 431 Round Bar Sizes & Dimensions
- AISI 431 Bar Chemical Composition
- SS 431 Round Bar Mechanical Properties
- 431 Stainless Steel Rod Physical Properties
- UNS S43100 Round Bar Equivalent Grades & Standards
- Stainless Steel 431 Round Bar Price
- Stainless Steel 431 Round Bar Applications
- FAQs – Stainless Steel 431 Round Bar
Stainless Steel 431 Round Bar Specification
| Property | Details |
|---|---|
| Grade | SS 431 / AISI 431 / UNS S43100 |
| Specifications | ASTM A276, ASTM A479 / ASME SA276, SA479 |
| Designation | UNS S43100, Werkstoff 1.4057, JIS SUS 431 |
| Standards | ASTM, ASME, DIN, BS, EN, IS, AMS, JIS, IBR |
| Round Bar Size | 4 to 500 mm diameter |
| Bright Bar | 4 to 100 mm diameter |
| Hex / Square Bar | Hex 18 to 57 mm; Square 18 to 47 mm |
| Flat Bar | thickness 2 to 150 mm, custom width |
| Length | 1 to 6 metres; custom cut lengths |
| Form | Round, Square, Hex, Flat, Rectangular, Forged, Threaded, Hollow |
| Finish | Black, Bright Polished, Rough Turned, NO.4, Matt, BA |
| MTC Certificate | EN 10204 3.1; PMI, mechanical and third-party reports |
SS 431 Round Bar Sizes & Dimensions
| Form | Size Range | Length |
|---|---|---|
| Round Bar | 4 to 500 mm diameter | 1 to 6 m / custom |
| Bright Bar | 4 to 100 mm diameter | 1 to 6 m / custom |
| Hex Bar | 18 to 57 mm A/F | 1 to 6 m / custom |
| Square Bar | 18 to 47 mm | 1 to 6 m / custom |
| Flat Bar | thickness 2 to 150 mm | 1 to 6 m / custom |
AISI 431 Bar Chemical Composition
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.20 max |
| Manganese (Mn) | 1.00 max |
| Silicon (Si) | 1.00 max |
| Phosphorus (P) | 0.040 max |
| Sulphur (S) | 0.030 max |
| Chromium (Cr) | 15.00 to 17.00 |
| Nickel (Ni) | 1.25 to 2.50 |
| Iron (Fe) | Balance |
SS 431 Round Bar Mechanical Properties
Mechanical properties vary with tempering temperature. Typical values for 431 bar:
| Temper (°C) | Tensile (MPa) | Yield 0.2% (MPa) | Elong (%) | Hardness (HB) | Impact (J) |
|---|---|---|---|---|---|
| Annealed | 862 | 655 | 20 | 285 max | – |
| 204 | 1345 | 1055 | 20 | 388 | 50 |
| 316 | 1295 | 1035 | 19 | 375 | 53 |
| 427 | 1350 | 1080 | 19 | 388 | – |
| 538 | 1140 | 965 | 19 | 321 | – |
| 593 | 1015 | 770 | 20 | 293 | 64 |
| 650 | 960 | 695 | 20 | 277 | 84 |
431 Stainless Steel Rod Physical Properties
| Property | Value |
|---|---|
| Density | 7800 kg/m³ (0.280 lb/in³) |
| Elastic Modulus | 200 GPa |
| Thermal Expansion (0 to 100°C) | 10.2 µm/m/°C |
| Thermal Conductivity (100°C) | 20.2 W/m.K |
| Specific Heat (0 to 100°C) | 460 J/kg.K |
| Electrical Resistivity | 720 nΩ.m |
| Magnetic Response | Magnetic in all conditions |
UNS S43100 Round Bar Equivalent Grades & Standards
Each 431 bar is produced to a published specification. See our full Standards library, including ASTM, ASME, DIN and ISO.
| Standard | Designation |
|---|---|
| UNS | S43100 |
| Werkstoff Nr. | 1.4057 |
| EN / Euronorm | X17CrNi16-2 |
| JIS | SUS 431 |
| BS | 431S29 |
| En | 57 |
| Swedish SS | 2321 |
Stainless Steel 431 Round Bar Price
Indicative export prices for 431 round bar by type and size. Final price depends on size, quantity, finish and current raw-material rates. Contact us for a firm quotation.
| Type | Dimensions | Price (US$/Ton) |
|---|---|---|
| Stainless Steel 431 Round Bar | 0.3 to 500 mm | 600 to 2600 |
| UNS S43100 Round Bar | 5 to 500 mm | 600 to 3600 |
| 431 Cold Finish Round Bar | 3 to 800 mm | 500 to 3000 |
| UNS S43100 Forged Round Bar | 5 to 300 mm | 1200 to 3500 |
| DIN 1.4057 Round Bar | 2 to 300 mm | 600 to 2600 |
Stainless Steel 431 Round Bar Applications
- Oil, Gas & Petrochemical: shafts, fasteners and valve parts in corrosive, high-stress service.
- Marine & Aerospace: high strength components resistant to mild marine corrosion.
- Power & Energy: turbine blades, bolting and wear parts.
- Pumps & Valves: pump shafts, valve stems and seats that carry torque.
- Fasteners & Shafts: bolts, nuts, screws and drive shafts needing hardness and strength.
- Food & Surgical: cutlery, utensils and instruments where a hard, hygienic edge is needed.
FAQs - Stainless Steel 431 Round Bar
What are the properties of 431 stainless steel?
How are SS 431 round bars hardened?
What is the difference between SS 416 and SS 431?
What is the equivalent of 431 stainless steel?
Request a 431 Round Bar Quote
Send your size, form and quantity requirement for a same-day Stainless Steel 431 round bar quotation. Request a Quote or email sales@jadealloys.com.
