| Type: | Stainless Steel Bars |
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| Standard: | ASTM, AISI, GB, JIS, DIN, EN |
| Grade: | 431 |
| Certification: | ISO, RoHS, IBR, AISI, ASTM, GB, EN, DIN, JIS |
| Shape: | Round |
| Technique: | Hot Rolled |
| Samples: |
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| Customization: |
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| Product Parameters: Stainless Steel rod | |
| Material | 431 |
| Specifications | ASTM A276, ASME SA276 / ASTM A479 ASME SA479 |
| Dimensions | EN, DIN, JIS, ASTM, BS, ASME, AISI |
| Round Bars | Outside Diameter in the range of 4mm to 500mm |
| Bright Bars | Outside Diameter in the range of 4mm to 100mm |
| Hex Bars | 18mm - 57mm (11/16″ to 2-3/4″) |
| Finish | Black, Bright Polished, Rough Turned, NO.4 Finish, Matt Finish, BA Finish |
| Length | 1 to 6 Meters, Custom Cut Lengths |
| Form | Round, Square, Hex (A/F), Rectangle, Billet, Ingot, Forging Etc. |
| Marking & Traceability | Each Stainless Steel rod is traceable to its producing mill and heat by an identification number etched within 24″ (610mm) of one end. |
| Test Certificate | Manufacturer Test Certificate according to EN 10204 3.1 B |
| Laboratory Test Certificate from Govt. Approved Lab. | |
| Under Third Party Inspection | |
| Testing & Inspection | Visual inspection • Surface roughness measurement • Helium-leak testing • Scanning Electron Microscopy (SEM) • Auger Electron Microscopy (AES) • Election Spectroscopy for Chemical Analysis (ESCA or XPS) • Particle testing • Moisture testing |
Daxun Alloys has a longstanding reputation for supplying top-tier stainless steel products around the world. We pride ourselves on being the premier provider of SS 431 Round Bars/Rods. Adhering to both national and international quality standards, our round bars are available in a variety of specifications to meet the diverse needs of our global clientele. Type 431, a hardenable martensitic stainless steel alloy, boasts exceptional tensile and torsional strength, making it an ideal material for the manufacture of robust shafts.
For more information on stainless steel rods, please contact Daxun
431 Stainless Steel Rod Chemical Composition
| SS UNS S43100 Round Bar Chemical Composition | ||
| 431 | Max | Min |
| C | 0.2 | - |
| Cr | 17 | 15 |
| Fe | Balance | - |
| Mn | 1 | - |
| Ni | 2.5 | 1.25 |
| P | 0.04 | - |
| S | 0.03 | - |
| Si | 1 | - |
| Tempering Temperature (°C) | Tensile Strength (MPa) | Yield Strength 0.2% Proof (MPa) | Elongation (% in 50mm) | Hardness Brinell (HB) | Impact Charpy V (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 |
Our forming capabilities include cutting-edge radial forging machines, heat treatment furnaces, melting furnaces, and rolling mills for manufacturing titanium rods, along with a unique hydroforming process for part fabrication.
Utilizing advanced heat treatment furnace equipment, we ensure the stability and high performance of our stainless steel rods through precise thermal processes.
Employing state-of-the-art vacuum induction furnaces, vacuum consumable furnaces, and electroslag furnaces, Daxun Stainless Steel minimizes impurities during smelting, thereby enhancing the overall performance of our finished stainless steel rods.
Our premium stainless steel products come with full certification and traceability. We proudly serve leading industries including aerospace, industrial, medical, marine, and military sectors, delivering unmatched quality and performance.
| Tensile Strength | Yield Strength | |||||||||||
| Alloy | UNS Designation | Spec. | psi | MPa | ksi | psi | MPa | ksi | Elongation in 2 inches (min.) % | Grain Size Req. | Max. Hardness | Modulus of Elasticity (x106 psi) |
| 304 | S30400 | A249, A312 | 75,000 | 515 | 75 | 30,000 | 205 | 30 | 35 | - | 90 Rb | 28 |
| 304L | S30403 | A270 A312 | 70,000 | 485 | 70 | 25,000 | 170 | 25 | 35 | - | 90 Rb | 28 |
| 304LN | S30453 | A249, A688 | 75,000 | 515 | 75 | 30,000 | 205 | 30 | 35 | - | 90 Rb | 28 |
| 304H | A30409 | A249, A312 | 75,000 | 515 | 75 | 30,000 | 205 | 30 | 35 | 7 or coarser | 90 Rb | 28 |
| The Mechanical Properties of grade 316L Stainless Steel are displayed in the following table. | |||||
| Grade | Tensile Str | Yield Str | Elong | Hardness | |
| (MPa) min | 0.2% Proof | (% in 50mm) min | |||
| (MPa) min | Rockwell B (HR B) max | Brinell (HB) max | |||
| 316 | 515 | 205 | 40 | 95 | 217 |
| 316L | 485 | 170 | 40 | 95 | 217 |
| 316H | 515 | 205 | 40 | 95 | 217 |
| Tensile Strength | Yield Strength | ||||||||
| Alloy | UNS Designation | Spec. | psi | MPa | ksi | psi | MPa | ksi | Elongation in 2 inches (min.) % |
| 321 | S32100 | - | 75,000 | 515 | - | 30,000 | 205 | - | 35 |
| 321H | S32109 | - | 75,000 | 515 | - | 30,000 | 205 | - | 35 |
| Grade | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 310S | 7.9 g/cm3 | 1402 °C (2555 °F) | Psi - 75000 , MPa - 515 | Psi - 30000 , MPa - 205 | 40% |
| Grade | Tensile Strength | Yield Strength | Elongation | Hardness | |
| (MPa) min | 0.2% Proof | (% in 50mm) min | |||
| (MPa) min | Rockwell C (HR C) | Brinell (HB) | |||
| UNS S31803 / 2205 | 621 | 448 | 25 | 31 max | 293 max |
| UNS S32205 / 2205 | 621 | 448 | 25 | 31 max | 293 max |
| Grade | Property | Value |
| 2507/ S32750 |
Density (g/cm3) | 7.8 |
| 0.2% Offset Yield Strength | 80 ksi | |
| Ultimate Tensile Strength | 116 ksi | |
| 0.1% Offset Yield Strength 0.2% | 91 ksi | |
| Elongation in 2 inches, % | 15% | |
| Hardness Rockwell C | 32 | |
| Impact Energy | 74 ft.-lbs | |
| Density | 0.28 lb per inch3 | |
| Modulus of elasticity | 28 x 10(6) psi | |
| Coefficient of thermal expansion | 7.2 x 10(-6) per of at 68 to 212 of | |
| Thermal conductivity | 8.7 Btu/hr ftoF | |
| Heat capacity | 0.12 Btu/ lb oF | |
| Electrical resistivity | 31.5 x10(-6) ohm-inch |
431 Stainless Steel Bar Material boasts exceptional corrosion resistance against a diverse array of corrosive media. While it offers some resilience to saltwater in cooler southern waters, it may not fare as well in warmer tropical conditions. Generally, the corrosion resistance of 431 Round Bar Material is comparable to, or slightly less than, that of 304 Grade Material. Optimal performance is achieved when the material maintains a smooth surface in its hardened and tempered state.
This material resists scaling in intermittent service up to 925°C and in continuous service up to 870°C. However, it is generally not recommended for use at temperatures exceeding the relevant tempering temperature due to a potential reduction in mechanical properties.
Full annealing is impractical for this grade as it tends to harden even during slow cooling. For process annealing, heat the material to 620-660°C and then air cool.
Hardening is achieved by heating the material to 980-1065°C, holding it for approximately 30 minutes, and then quenching in air or oil. Pre-heating at 760-790°C can be beneficial for complex parts or those already hardened. Tempering should be done to meet mechanical requirements, with specific temperatures detailed in the accompanying table.
The tempering range of 425-600°C should be avoided due to the risk of decreased impact toughness, although this effect is less pronounced compared to most other martensitic grades.
Welding this material is challenging due to the risk of cracking. A pre-heat of 200-300°C is recommended before welding. While Grade 410 filler rod can be used, Grades 308L, 309, or 310 will produce more ductile welds if matching properties are not essential. Post-weld heat treatment at 650°C is advisable.
In its annealed state, this grade is relatively easy to machine. However, once hardened beyond 30HRC, machining becomes more difficult. The Ugima Improved Machinability version of Grade 431 offers notable improvements in machining speeds and tool life.
Common applications include nuts and bolts, propeller shafting, pump shafts, beater bars, and marine hardware.
These properties are specified for bar products under ASTM A276. While similar properties are specified for other products like plates and forgings, they are not necessarily identical and vary according to their respective specifications.
Stainless steel round bars are extensively used across various sectors, from construction to automotive parts. To cater to this wide range of applications, Daxun Alloys offers stainless steel round bars in multiple grades and sizes. Our advanced cutting service ensures precise adherence to your specifications each time.
Can you manufacture stainless steel grinding bars and rods?
Yes, we specialize in producing stainless steel grinding bars and rods with exceptional precision in dimension, roundness, and straightness. These are superior to standard polished stainless steel bars. However, please note that the processing costs are higher.
Q1: What products can you offer?
A: We offer a comprehensive range of steel types including 310S, 316L, 304, 304L, 201, 904L, 316H, and 316.
In addition, we provide 400 series and duplex stainless steels such as 2205, 2304, 2101, 2507, alongside high-nickel alloys like 904L, 800H, and 600H.
Q2. Can you produce the products according to my own drawings?
Yes, we can meticulously manufacture products based on your drawings to ensure they meet your expectations.
Q3. How does your factory manage quality control?
Quality is our top priority. We consistently emphasize rigorous quality control from the beginning to the end of the production process.
Q4. Can I request to change the form of packaging and transportation?
Yes, we can modify the packaging and transportation methods according to your specifications.
However, any additional costs incurred during this period will be borne by you.
Q5. How does your factory manage quality control?
Quality is our top priority. We consistently emphasize rigorous quality control from the beginning to the end of the production process.
Q6. How long is the delivery time?
A: The delivery time is typically 7 to 20 working days after payment confirmation.
If the order is urgent, we will expedite production to meet your schedule.
Q7. What are your payment terms?
A: 100% T/T in advance, Western Union for small orders.
B: 30% T/T in advance and the remaining 70% before shipment.
C: 100% Irrevocable Letter of Credit (L/C) at sight for large orders.
Q8: Can you produce Deep Drawing Quality (DDQ) materials?
A: Yes, we can. Our materials are suitable for making stainless steel pots, sinks, bowls, etc. Provide us with your specific usage requirements, and we will adjust the mechanical properties accordingly.
Q9: How can I obtain a sample?
A: FREE samples are available for your evaluation. For small pieces, we may cover the courier costs depending on the situation.
Q10: To which countries have you exported your products?
A: We have successfully exported stainless steel materials to countries including Vietnam, Thailand, Turkey, Russia, Morocco, Korea, India, Pakistan, UAE, Ukraine, and more.
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