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UNS S31675 High Nitrogen Steel Round Bar UNS S31675 High Nitrogen Steel Round Bar UNS S31675 High Nitrogen Steel Round Bar UNS S31675 High Nitrogen Steel Round Bar UNS S31675 High Nitrogen Steel Round Bar

UNS S31675 High Nitrogen Steel Round Bar

1296.0 INR/Piece
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Product Details:

  • Grade S31675
  • Processing Cold Drawn, Hot Rolled, Forged
  • Material UNS S31675 High Nitrogen Steel
  • Standard ASTM, ASME, DIN, EN, JIS
  • Diameter 10 mm to 300 mm
  • Application Chemical processing, Marine environments, Petrochemical, Oil and gas industry
  • Technique Hot Rolled / Forged
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UNS S31675 High Nitrogen Steel Round Bar Price And Quantity

  • 1296.0 INR/Piece
  • 1 Piece

UNS S31675 High Nitrogen Steel Round Bar Product Specifications

  • Cold Drawn, Hot Rolled, Forged
  • UNS S31675 High Nitrogen Steel
  • ASTM, ASME, DIN, EN, JIS
  • S31675
  • Peeled, Bright, Polished
  • Hot Rolled / Forged
  • Round Bar
  • 1 Meter to 6 Meters or custom cut lengths
  • Chemical processing, Marine environments, Petrochemical, Oil and gas industry
  • 10 mm to 300 mm
  • High temperature, corrosion-resistant structures
  • H9, H10, H11, K12, K13 or as required
  • 650 MPa
  • Smooth, Mill Finish
  • 40%
  • Excellent in chlorides and acid environments
  • 200 HB (typical)
  • Sharp or rounded as specified
  • 295 MPa
  • Annealed
  • 8.0 g/cm3
  • Wooden boxes, Bundled with straps, Plastic wrapping as required
  • Round

Product Description

UNS S31675 High Nitrogen Stainless Steel Round Bars, Rods, and Bars

UNS S31675internationally specified under ASTM F1586, ISO 5832-9, and European standard DIN Werkstoff Nr. 1.4472 (X2CrNiMoN21-16-5-4), and known commercially by trade names such as Rex 734 and UGIPURE 4472is a high-purity, fully austenitic stainless steel manufactured via vacuum-arc remelting or electroslag remelt processes. Designed primarily for orthopaedic implants, surgical instruments, and high-fatigue engineering components, it relies on a deliberate solid-solution nitrogen addition of 0.25 to 0.50 percent. This nitrogen enrichment provides substantially higher yield strength, enhanced fatigue resistance, and superior resistance to localized pitting and crevice corrosion compared to conventional implant-grade stainless steels like 316L.

Standards and Specifications

Governing specifications include UNS S31675, ASTM F1586 for wrought nitrogen-strengthened stainless steel bar and wire for surgical implants, ISO 5832-9 for surgical implants, and DIN Werkstoff Nr. 1.4472.

Chemical Composition Limits

The chemical baseline requires 19.50 to 22.00 percent chromium, 9.00 to 11.00 percent nickel, 2.00 to 3.00 percent molybdenum, 2.00 to 4.25 percent manganese, 0.25 to 0.50 percent nitrogen, and 0.25 to 0.80 percent niobium. Maximum impurity thresholds are set at 0.030 percent carbon, 0.75 percent silicon, 0.025 percent phosphorus, 0.010 percent sulfur, and 0.25 percent copper, with iron forming the balance.

Physical Properties

UNS S31675 exhibits a density of 7.88 grams per cubic centimeter (0.285 pounds per cubic inch) and a tension elastic modulus of 200 gigapascals. Its calculated Pitting Resistance Equivalent Number ranges between 33.0 and 38.0. Due to its balanced austenitic structure, the alloy maintains a magnetic permeability below 1.005, remaining non-magnetic even after extensive cold deformation.

Mechanical Properties

Mechanical requirements vary based on product form and processing condition.

In the solution-annealed state, round bars specify a minimum tensile strength of 740 megapascals (107 ksi), a minimum 0.2 percent yield strength of 430 megapascals (62 ksi), a minimum elongation of 35 percent, and a hardness between 200 and 250 Brinell.

In the cold-worked high-strength condition used for fixation devices, minimum tensile strength increases to 1000 megapascals (145 ksi), minimum yield strength increases to 750 megapascals (109 ksi), minimum elongation is 10 to 15 percent, and hardness reaches 30 to 38 Rockwell C.



Outstanding Corrosion Resistance

UNS S31675 High Nitrogen Steel Round Bars provide unparalleled protection against corrosion, making them perfect for use in chloride-rich and acidic environments. This high nitrogen stainless steel ensures long-lasting service life, especially in harsh industrial sectors like marine and chemical processing.


Precision Engineering and Versatile Applications

Available in a range of diameters and custom lengths, these round bars meet multiple international standards (ASTM, ASME, DIN, EN, JIS). They are expertly processed by hot rolling, forging, cold drawing, and feature finishes such as peeled, bright, or polished to suit diverse high-temperature, corrosion-resistant structures and components.


Secure Packaging & Customization Options

Every round bar is delivered in sturdy wooden boxes, securely bundled with straps, and optionally wrapped in plastic to ensure safe transit. Customers can specify edge and tolerance requirements, ensuring each order matches exact project demands for quality and fit.

FAQ's of UNS S31675 High Nitrogen Steel Round Bar:


Q: How is the UNS S31675 High Nitrogen Steel Round Bar typically processed and finished?

A: These round bars are processed through hot rolling, forging, and cold drawing techniques. Finishes include peeled, bright, and polished, with each enhancing the smooth, mill finish surface. Edge conditions can be sharp or rounded based on customer requirements.

Q: What are the primary benefits of using UNS S31675 High Nitrogen Steel Round Bars in industrial applications?

A: The bars provide excellent corrosion resistance in chlorides and acid environments, high yield and tensile strength, and a long service life even under harsh conditions. This makes them ideal for high-temperature, corrosion-resistant structures in demanding industries.

Q: Where are these high nitrogen steel bars commonly utilized?

A: They are extensively used in the chemical processing, marine, petrochemical, oil, and gas industries where parts and structures must withstand aggressive chemicals, seawater, and high temperatures.

Q: When would choosing a UNS S31675 round bar over other grades be advantageous?

A: Opting for UNS S31675 is most advantageous when superior corrosion resistance and mechanical strength are essential, particularly in chloride or acidic environments that challenge standard stainless steels.

Q: What packaging methods are used to ensure the protection and safe delivery of these round bars?

A: Round bars are packaged in strong wooden boxes, securely bundled with straps, and, when required, wrapped in protective plastic to safeguard against physical and atmospheric damage during shipping.

Q: How can customers specify custom dimensions or edge/tolerance requirements for their orders?

A: Customers can request custom-cut lengths, choose from various edge conditions (sharp or rounded), and select tolerances like H9, H10, H11, K12, and K13, ensuring each round bar meets precise project specifications.

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