SS 1.4404 Solution Annealed Round Bar
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If you are looking for a stainless steel bar with excellent corrosion resistance, superior cleanliness, and reliable mechanical properties, especially suitable for machining, pressure components, or welded structures, then SS 1.4404 annealed round bar is worth considering! EN 1.4404 is the European standard grade for AISI 316L stainless steel, and when supplied in the solution annealed condition, it offers optimal microstructure, uniform properties, and complies with stringent international standards.
What Is SS 1.4404 Solution Annealed Round Bar?
Material grade: EN 1.4404 (X2CrNiMo17-12-2)
Equivalent grades: AISI 316L / UNS S31603
Product form: Round bar / rod
Heat treatment: Solution annealed & quenched
Solution annealing involves heating the material to approximately 1040–1120 °C, followed by rapid cooling. This process dissolves chromium carbides, restores corrosion resistance, and ensures a fully austenitic structure-critical for demanding service environments.
SS 1.4404 Annealed Round Bar Sizes & Tolerances
| Dimensions: | ASTM, ASME, DIN, BS, EN, IS, AMS, JIS, IBR & Other International Standards. |
|---|---|
| Standard: | ASTM A276, ASTM A479 |
| 316L SS Round Bars: | Outside Diameter in the range of 4mm to 500mm |
| SS 316L Square Bar: | 18mm – 47mm (11/16? to 1-3/4?) |
| Stainless Steel 316L Bright Bars: | Outside Diameter in the range of 4mm to 100mm |
| 316L Stainless Steel Hex Bar: | 18mm – 57mm (11/16? to 2-3/4?) |
| Stainless Steel 316L Flat Bar: | 1/2" to 10" in thickness range of 2mm to 150mm, Custom Size Stainless Steel Flats available |
| Length: | 1 to 6 Meters, Custom Cut Lengths |
Chemical Composition (Typical)
| Element | EN 1.4404 (%) |
|---|---|
| Carbon (C) | ≤ 0.03 |
| Chromium (Cr) | 16.5 – 18.5 |
| Nickel (Ni) | 10.0 – 13.0 |
| Molybdenum (Mo) | 2.0 – 2.5 |
| Manganese (Mn) | ≤ 2.0 |
| Silicon (Si) | ≤ 1.0 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.015 |
| Iron (Fe) | Balance |
Mechanical Properties (Solution Annealed Condition)
| Property | Typical Value |
|---|---|
| Tensile Strength | 500 – 700 MPa |
| Yield Strength (0.2%) | ≥ 200 MPa |
| Elongation | ≥ 40% |
| Hardness | ≤ 215 HB |
| Density | 8.0 g/cm³ |
Heat Treatment for 316L SS Cold Rolled Round Bar
| Process | Temperature Range (°C) | Cooling Method | Holding Time |
|---|---|---|---|
| Quenching | 1040°C - 1100°C | Quenching Water | As required |
| Stress Relieving | 450°C - 600°C | Air | 1 - 2 Hrs. |
| Annealing | 1010°C - 1120°C | Rapid Air | 30 Minut. to 2 Hrs. |
| Solution Treatment | 1020°C - 1100°C | Quenching Rapid | 30 Minut. min |
316L Solution Annealed vs Cold Worked Round Bar
| Feature | Solution Annealed | Cold Worked |
|---|---|---|
| Corrosion Resistance | Excellent | Reduced |
| Machinability | Good | Moderate |
| Residual Stress | Low | High |
| Recommended for Welding | Yes | Limited |
A276 Grade 316L Hexagonal Rod - Detailed Information
Packaging: Bare bundles, horizontally strapped.
Marking: Paint or labels applied to the outer layer of the bundle, indicating required information.
Surface Treatment: 2B and No.1
Testing: Chemical composition analysis, tensile test, flattening test, impact test, leak test, dimensional test, and visual inspection.
Test Certificates: Factory test certificate, TPL report, and raw material certificate. Delivery Time: Stock items shipped immediately, customized products 15-30 days.
Value-Added Services: Pre-treatment, parts cutting, third-party inspection, and sample service.
