Stainless Steel 431 round bars and rods from Da Nang, Vietnam, are supplied by Chung Metal, a martensitic stainless alloy with good corrosion resistance in moderate environments and high strength. 431 includes nickel and chromium for enhanced mechanical properties. Our rod and bar stock is manufactured to close tolerances, controlled microstructure, and full certification. Aerospace, defense, petrochemical, and mechanical engineering industries use 431 rods for shafting, fasteners, and structural parts. Chung Metal provides consistency and performance in challenging mechanical applications.
Stainless Steel 431 usually has ~15–17% chromium, ~1.25–2.0% nickel, ~0.2–0.4% carbon, along with traces of manganese, silicon, and molybdenum. In temper condition, tensile strength can be up to ~800–1,200 MPa, yield ~600–900 MPa, elongation ~10–20%. Hardness is high in temper condition. It has good corrosion resistance in atmospheric and mildly corrosive conditions, excellent mechanical strength, and good fatigue properties. It is heat treatable, with martensitic structure deliverable through quench & temper.
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 |
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|
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) |
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|
0-100°C |
0-315°C |
0-538°C |
at 100°C |
at 500°C |
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|
431 |
7800 |
200 |
10.2 |
12.1 |
– |
20.2 |
– |
460 |
720 |
Yes, Stainless Steel 431 Round Bars/Rods can be used at high temperatures, offering good oxidation and scaling resistance up to 600°F (316°C), making them suitable for moderate temperature applications.
Yes, Stainless Steel 431 Round Bars/Rods are fully recyclable. Being a type of stainless steel, they can be melted down and repurposed without losing their inherent properties, contributing to sustainability.
Yes, Stainless Steel 431 Round Bars/Rods can be welded, although preheating and post-weld heat treatment are recommended to prevent cracking and maintain the material's mechanical properties.
431 round bars and rods find application in shafts, fasteners, pump parts, and spindles of valves. In automobile, apply to trim and stress parts, in aviation apply to landing gear pins and structural links. Apply also in oil & gas fittings in moderate corrosive media, mechanical structure parts in machinery, and tooling in moderate environments. Their strength and resistance to corrosion qualify them for use in shafts, couplings, and precision fasteners that need to withstand mechanical load as well as exposure to moisture or chemicals.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
Chung Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Da Nang, Vietnam
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