ASTM A479 SS 316L Stainless Steel Rods
Standard:ASTM A479 / ASME SA-479
Material Grade:316L/S31603/1.4404/X2CrNiMo17-12-2
Manufacturing Process:Hot Rolled / Cold Drawn / Forged
Shape:Round Bar / Rod
Heat Treatment:Solution Annealed
Delivery Condition:Annealed
Diameter Range:3–500 mm
Standard Length:2000–6000 mm / Custom Length
Surface Finish:Black / Bright / Peeled / Turned / Ground / Polished
Certification:EN 10204 3.1 MTC
What Is the ASTM A479 Specification?
ASTM A479 / ASME SA-479 is a specification specifically covering stainless steel bars and shapes for boilers and pressure vessels. Unlike general-purpose industrial bar standards, this specification establishes material requirements for pressure equipment applications, including chemical composition, mechanical properties, heat treatment and inspection. Buyers should verify the applicable edition and purchase-order requirements for specific heat-treatment records, hardness testing and material traceability requirements.
316L stainless steel round bar (UNS S31603) is a low-carbon, molybdenum-bearing austenitic stainless steel grade covered by this specification. It has a maximum carbon content of 0.030% and a molybdenum content of 2.0–3.0%. Its low-carbon composition helps minimize chromium carbide precipitation during multi-pass welding, helping maintain good resistance to intergranular corrosion in tube-to-tubesheet joints, flange welds and thick-section pressure-retaining components.
ASTM A479 SS 316L Stainless Steel Rods Manufacturer
GNEE supplies ASTM A479 316L stainless steel bars manufactured using electric arc furnace (EAF) or equivalent advanced steelmaking processes. During production, sufficient material is cropped from both ends of the bars to remove potential pipe shrinkage cavities and severe macrosegregation. All bars undergo solution annealing to achieve a uniform austenitic microstructure and optimize corrosion resistance. We offer various surface finishes, including hot-rolled black, peeled, turned and precision-ground finishes. Customized cut-to-length services and forged billet sizes are also available to meet forging and machining requirements. In addition, we can supply square bars, hexagonal bars and various customized cross-sectional profiles in accordance with ASTM A479 requirements upon request.
Each batch of products is supplied with a valid Material Test Certificate (MTC) and is traceable to the specific heat number, meeting the rigorous requirements of the petrochemical and energy sectors, as well as highly corrosive service environments.
Specifications for Stainless Steel 316/316L Cold Drawn Round Bars
| Condition | Cold Drawn & Polished | Cold Drawn, Centreless Ground & Polished | Cold Drawn, Centreless Ground & Polished (Strain Hardened) |
| Diameter (Size) | 2 mm to 5mm (1/8″ to 3/16″) | 6mm to 22m (1/4″ to 7/8″) | 10mm to 40mm (3/8″ to 1-1/2″) |
| Diameter Tolerance | h9 (Din 671),h11 ASTM A 484 |
h9 (Din 671) ASTM A 484 |
h9 (Din 671),h11 ASTM A 484 |
| Length | 3/4/5.6/6 meter (12/14ft/20feet) |
3/4/5.6/6 meter (12/14ft/20feet) |
3/4/5.6/6 meter (12/14ft/20feet) |
| Length Tolerance | -0/+200mm or +100mm or +50mm (-0 "/+1 feet or +4 " or 2 ") |
-0/+200mm or +100mm or +50mm (-0 "/+1 feet or +4 " or 2 ") |
-0/+200mm (-0 "/+1 feet) |
Chemical Composition of ASTM A479 316L Stainless Steel bar
|
Element |
Minimum (%) |
Maximum (%) |
|---|---|---|
|
Carbon (C) |
- |
0.030 |
|
Manganese (Mn) |
- |
2.00 |
|
Silicon (Si) |
- |
1.00 |
|
Phosphorus (P) |
- |
0.045 |
|
Sulfur (S) |
- |
0.030 |
|
Chromium (Cr) |
16.00 |
18.00 |
|
Nickel (Ni) |
10.00 |
14.00 |
|
Molybdenum (Mo) |
2.00 |
3.00 |
|
Nitrogen (N) |
- |
0.10 |
|
Iron (Fe) |
Balance |
Balance |
Mechanical Properties of 316L Stainless Steel Rods
The following values are typical minimum requirements for annealed ASTM A479 316L bars. Confirm the applicable product-size category and specification edition before contractual acceptance.
|
Mechanical Properties |
Requirements |
|---|---|
|
Tensile Strength |
≥485 MPa (70 ksi) |
|
Yield Strength (0.2% Offset) |
≥170 MPa (25 ksi) |
|
Elongation (in 50 mm) |
≥30% |
|
Reduction of Area |
≥40% |
|
Hardness (Brinell) |
≤217 HBW |
|
Hardness (Rockwell B) |
≤95 HRB |
Heat Treatment Requirements
|
Item |
Requirement |
|---|---|
|
Heat Treatment |
Solution Annealing |
|
Solution Temperature |
Approximately 1040–1120°C |
|
Cooling Method |
Rapid Cooling / Water Quenching |
|
Delivery Condition |
Solution Annealed |
|
Purpose |
Restore corrosion resistance and improve metallurgical stability |
The exact heat-treatment requirements should follow the applicable ASTM A479 edition and material grade.
What are the primary differences between ASTM A479 316L and ASTM A276 316L round bars?
ASTM A276 is a general industrial standard for bars intended for use in mechanical components. ASTM A479, by contrast, is specifically developed for the manufacture of boilers and pressure vessels; it mandates solution annealing (with documented evidence), hardness verification at the ends of each bar, and more rigorous traceability requirements. For pressure-retaining components governed by ASME codes, ASTM A276 bars cannot be used as a substitute for ASTM A479 bars without formal engineering approval and additional testing.
ASTM A479 SS 316L Stainless Steel Rods HS Code
|
Product |
Common HS Code |
Description |
|---|---|---|
|
316L Stainless Steel Round Bar / Rod |
7222.11 |
Bars and rods of stainless steel, hot-rolled, in irregularly wound coils |
|
316L Stainless Steel Round Bar / Rod |
7222.19 |
Other bars and rods of stainless steel, hot-rolled |
|
316L Stainless Steel Cold-Drawn Bar |
7222.20 |
Bars and rods of stainless steel, cold-formed or cold-finished |
|
316L Stainless Steel Other Bars |
7222.30 |
Other bars and rods of stainless steel |
ASTM A479 SS 316L Stainless Steel Rods Price List 2026
|
|
Surface Finish |
Estimated Price (USD/kg) |
Estimated Price (USD/MT) |
|---|---|---|---|
|
SS 316L Stainless Steel Rods |
Hot Rolled / Black |
$4.00–4.40 |
$4,000–4,400 |
|
Peeled / Turned |
$4.10–4.60 |
$4,100–4,600 |
|
|
Peeled / Bright |
$4.20–4.80 |
$4,200–4,800 |
|
|
Hot Rolled / Turned |
$4.30–4.90 |
$4,300–4,900 |
|
|
Forged / Rough Machined |
$4.50–5.20 |
$4,500–5,200 |
|
|
Forged / Customized |
$4.80–5.80 |
$4,800–5,800 |
Quality Inspection
Every production batch must pass the mandatory inspections stipulated by the ASTM A479 standard, including: spectrochemical analysis, room-temperature tensile testing, Brinell hardness testing on both ends of each bar, documentation of solution-annealing heat treatment, and Positive Material Identification (PMI) for each heat. For pressure vessel applications, we offer supplementary testing, such as ultrasonic testing to assess internal integrity, intergranular corrosion testing in accordance with ASTM A262, and Charpy impact testing conducted at the design temperature.
Dimensional Inspection
Lead time and packaging:
Standard hot-rolled and solution-annealed stock items can be shipped within 8–14 business days; orders requiring peeling, grinding, or custom cutting will take 16–26 business days. The ends of the bars are fitted with protective caps and wrapped in anti-rust paper. The bars are then strapped with steel bands and placed on fumigated wooden pallets or packed into wooden crates, suitable for ocean freight.
Customer Feedback
A heat exchanger original equipment manufacturer (OEM) selected A479 316L round bar as the raw material for fabricating tubesheets used in a heat recovery unit for seawater reverse osmosis (RO) brine. Previously, the use of A276 bar stock-which lacked documentation proving it had undergone solution annealing-had resulted in a failed audit.
The A479 material we supplied came with complete SA-479 compliance documentation, including 100% end-face hardness verification and positive material identification (PMI) for full traceability. This enabled the components to pass third-party inspection on the first submission and ultimately helped the heat exchanger successfully obtain ASME U-stamp certification.
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