Stainless Steel Round Bar
Trusted Stainless Steel Bar Supplier – Gengfei Steel
Certificated：ISO9001:2015, CE, ROHS
Gengfei Steel is an experienced steel supplier, providing the best prices and services.
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Description
What is the Stainless Steel Round Bar?
Stainless steel round bars are widely used metal materials known for their excellent corrosion resistance, strength, and workability. They are typically made from stainless steel alloys and are suitable for applications requiring both durability and aesthetic appeal.
Gengfei Steel offers precision stainless steel round bars that meet ASTM, ASME, and GB standards. With options in cold rolled and hot rolled processing, and an extensive list of material grades, our bars are trusted across industries such as oil & gas, food processing, construction, shipbuilding, and power generation.
Whether you need high-strength martensitic bars (e.g., 410, 420), corrosion-resistant austenitic bars (e.g., 304, 316L), or high-temp duplex bars (e.g., 329, 347H), we supply the right bar for your specific application.
Specifications of Stainless Steel Round Bar
| Item | Specification |
|---|---|
| Standards | ASTM A276, A479, A484, A582; ASME SA276, SA484; GB/T1220, GB4226 |
| Available Grades | 201, 202, 301, 304, 304L, 309S, 310S, 316, 316L, 317, 317L, 321, 329, 347, 410, 420, 430, etc. |
| UNS Numbers | S20100, S20200, S30100, S30400, S30403, S30908, S31008, S31600, S31635, etc. |
| Diameter Range | 0.1mm – 500mm |
| Length Options | 2m, 5.8m, 6m, or customized |
| Production Method | Cold Rolled, Hot Rolled |
| Surface Finish | Bright, Polished, Black, Hairline |
| MOQ | 1 Ton |
| Packaging | Standard seaworthy export packaging or customized |
Key Features
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✅ Available in over 25 stainless steel grades
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✅ Complies with ASTM, ASME, and GB quality standards
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✅ Precise tolerance & smooth surface
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✅ Excellent mechanical properties & corrosion resistance
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✅ Suitable for machining, forging, fabrication, and welding
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✅ Offered in both cold drawn and hot rolled forms
Applications of Stainless Steel Round Bar
Stainless Steel Round Bar Grade Comparison Table
| Grade | Type | Key Features | Typical Applications |
|---|---|---|---|
| 304 | Austenitic | Excellent corrosion resistance, easy to form and weld | Food processing, kitchenware, chemical equipment |
| 304L | Austenitic | Low carbon, better weldability and resistance to intergranular corrosion | Welded parts, tanks, piping |
| 316 | Austenitic | Molybdenum-added, high chloride resistance (e.g. seawater) | Marine parts, medical equipment, pharmaceuticals |
| 316L | Austenitic | Low carbon version of 316, better for welding and hygienic environments | Welded marine components, biotech, sanitary equipment |
| 321 | Austenitic | Stabilized with titanium, excellent high-temperature resistance | Aerospace, exhaust manifolds, heat exchangers |
| 430 | Ferritic | Magnetic, good corrosion and oxidation resistance, economical | Appliances, indoor panels, automotive trims |
| 409 | Ferritic | Heat-resistant, cost-effective, moderate corrosion resistance | Automotive exhaust systems |
| 410 | Martensitic | Heat-treatable, high strength and hardness, moderate corrosion resistance | Cutlery, valves, shafts |
| 420 | Martensitic | Polishable, high hardness, good wear resistance | Surgical tools, knives, scissors |
| 440C | Martensitic | Very high carbon content, superior hardness and wear resistance | Bearings, high-end knives, precision tools |
| 2205 | Duplex | High strength, excellent pitting and stress corrosion resistance | Oil & gas, offshore platforms, chemical tanks |
How to Choose the Right Stainless Steel Bar
1. Determine the Application Environment
Ask yourself:
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Will it be exposed to moisture, chemicals, saltwater, or high temperatures?
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If yes, choose grades with high corrosion resistance like 316 or 2205.
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For mild environments, 304 or 430 may be sufficient.
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2. Consider Mechanical Properties
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Need high strength or hardness?
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Choose martensitic grades like 410, 420, or 440C (used in tools, shafts, bearings).
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Need good ductility and formability?
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Go for austenitic grades like 304 or 316.
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3. Welding and Fabrication Requirements
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If welding is required:
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Use low-carbon grades such as 304L or 316L to avoid intergranular corrosion.
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For machining-intensive processes:
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Consider ferritic or martensitic grades, which offer better machinability.
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4. Budget Constraints
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Tight budget?
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430 or 409 are cost-effective alternatives with reasonable corrosion resistance.
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No compromise on quality or durability?
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Opt for premium grades like 316L or 2205 duplex.
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5. Regulatory or Industry Standards
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Certain industries (e.g., food, medical, oil & gas) have strict requirements.
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Use 304/316 for food-grade and medical applications.
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Use 2205 duplex for offshore and chemical plant environments.
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Tips:
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Always confirm chemical and mechanical requirements before choosing.
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When in doubt, consult with a materials engineer or supplier.
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If your project involves critical safety or compliance standards, choose certified materials.
📞 Get a Fast Quote
Looking for a reliable stainless steel bar supplier in China? Gengfei Steel is your trusted source. Contact our team now for free samples, pricing, or custom production support.
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📞 WhatsApp / Phone: +86 191 3986 3252
🌐 Website: www.gengfeisteel.com
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