Astm A479 Type 316 Stainless Steel Round Bars
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What Is ASTM A479 Type 316 Stainless Steel Round Bar?
ASTM A479 Type 316 stainless steel round bar is a molybdenum-bearing austenitic stainless steel product manufactured under the ASTM A479 specification for forged and hot-rolled bars used in pressure vessels, chemical processing, marine environments, and food-grade equipment.
The addition of 2–3% molybdenum significantly enhances corrosion resistance compared to 304, especially against chloride pitting, acidic solutions, and saline exposure. This makes 316 round bars one of the most demanded materials for critical and high-corrosion industrial environments.
ASTM A479 Type 316 Stainless Steel Round Bar Data Sheet
| Parameter | Details |
|---|---|
| Standard | ASTM A479 / ASME SA479 |
| Grade | Type 316 / UNS S31600 |
| Equivalent Standards | EN 1.4401, JIS SUS316, DIN X5CrNiMo17-12-2 |
| Manufacturing Process | Hot Rolled / Forged / Cold Drawn |
| Finish | Bright, Polished, Peeled, Turned, or Black |
| Diameter Range | 4 mm – 400 mm |
| Length | 2 m – 6 m (custom cut available) |
| Chemical Composition (% Typical) | C ≤ 0.08, Mn ≤ 2.00, Si ≤ 1.00, Cr 16.0–18.0, Ni 10.0–14.0, Mo 2.0–3.0 |
| Mechanical Properties (Annealed Condition) | Tensile Strength ≥ 515 MPa, Yield Strength ≥ 205 MPa, Elongation ≥ 40%, Hardness ≤ 217 HB |
| Heat Treatment | Solution Annealed at 1010–1120°C followed by rapid cooling |
What is the difference between ASTM A276 and ASTM A479 round bars?
Both cover stainless steel bars, but ASTM A479 specifically applies to bars used in pressure vessel and high-temperature service, ensuring stricter mechanical and heat treatment requirements.
Can ASTM A479 Type 316 bars be machined or polished?
Yes, Gnee supplies precision-machined and polished 316 bars, with surface finishes up to Ra ≤ 0.8 μm, suitable for high-end mechanical or architectural use.
What's the temperature range for continuous service?
Type 316 stainless steel remains stable and corrosion-resistant up to 870°C (1600°F) under intermittent exposure.
ASTM A479 Type 316 Stainless Steel Round Bar Price (Reference)
The price depends on size, finish, and order quantity.
4–25 mm bright bar: USD $4.80 – $6.20 per kg
30–100 mm hot-rolled bar: USD $5.30 – $6.80 per kg
Over 100 mm forged bar: USD $6.50 – $7.90 per kg
Contact Gnee for bulk order discounts and custom diameters.Email: info@gneestainless.com
If you have a project need for 316L 1.4404 stainless steel bar, we welcome your order. GNEE has a large inventory of popular products for you to choose from. We can process these bars into a variety of practical shapes, including round, square, hexagonal, and flat. For detailed chemical composition and free samples, please contact our factory today. We offer competitive pricing and excellent service.
| Capability | Details |
|---|---|
| Processing Equipment | CNC lathes, centerless grinders, automatic cutting machines |
| Stock Availability | More than 500 tons of ASTM A479 Type 316 bars in stock |
| Surface Options | Bright, peeled, black, mirror, or polished finish |
| Certifications | ISO 9001, SGS, BV, PED, EN 10204 3.1 |
| Customization | Cutting, threading, drilling, and export packaging |
| Delivery Time | 7–15 working days for stock materials |
| Export Markets | Europe, North America, Southeast Asia, Middle East |
