Stainless Steel Round Bar - AISI 304/316, Precision Ground, ASTM A276

Stainless steel round bar represents a cornerstone product in modern industrial manufacturing, serving critical roles in applications demanding exceptional corrosion resistance and mechanical strength. Engineered to meet stringent international standards including ASTM A276 and EN 10088-3, these precision-ground bars deliver consistent performance across diverse sectors from chemical processing to marine engineering. Our mill-direct inventory encompasses both austenitic grades 304 and 316, offering procurement teams cost-effective solutions without compromising on material integrity or dimensional accuracy.

What is Stainless Steel Round Bar?

A stainless steel round bar is a solid cylindrical metal product manufactured through hot rolling or cold drawing processes, characterized by chromium content exceeding 10.5% which forms a passive oxide layer providing superior resistance to corrosive environments. These bars are produced in accordance with ASTM A276/A276M-17 specifications, ensuring consistent chemical composition and mechanical properties suitable for machining, welding, and structural applications.

Stainless Steel Round Bar Technical Specifications

Our precision-ground round bars comply with ASTM A276 Section 6 requirements, featuring diameter tolerances of ±0.005" for sizes under 1" and ±0.010" for larger dimensions. Grade 304 exhibits tensile strength of 515 MPa minimum with 40% elongation, while 316 offers enhanced pitting resistance through 2-3% molybdenum addition. Surface finish achieves Ra 0.8 μm after centerless grinding, with straightness maintained within 0.125" per 5 feet of length per ASTM specifications.

Why Choose Our Stainless Steel Round Bars

We maintain factory-competitive pricing through direct mill partnerships while providing full material traceability documentation including EN 10204 3.1 certificates. Our quality management system certified to ISO 9001:2015 ensures every bar undergoes ultrasonic testing per ASTM A276 Supplementary Requirement S1, guaranteeing freedom from internal discontinuities. With inventory stocked in diameters from 1/4" to 12" and lengths up to 20 feet, we support rapid fulfillment for both prototype and production volumes.

Frequently Asked Questions

What is the minimum order quantity (MOQ)?

Our standard MOQ is 500 kg per specification to optimize mill production efficiency, though we accommodate smaller quantities for custom diameters or special surface finishes at adjusted pricing. Mixed-grade orders combining 304 and 316 bars can meet the threshold when shipped to a single destination.

Do you provide material test certificates?

Yes, every shipment includes EN 10204 Type 3.1 certificates issued by our accredited testing laboratory, documenting chemical analysis per ASTM E1086 and mechanical testing per ASTM E8. Certificates reference heat numbers traceable to original steel mill production records, with optional PMI verification available upon request.

What is the typical delivery time?

Stock sizes in 304 and 316 grades ship within 3-5 business days from our regional distribution centers. Custom diameters requiring precision grinding or non-standard lengths typically require 15-20 business days, including mill production and quality inspection cycles. Expedited processing is available for critical applications with surcharge.

Can you cut to custom sizes?

Our CNC sawing capabilities accommodate tolerance cutting to ±1/16" for lengths from 6" to 240", with burr-free edges suitable for direct machining. We also offer centerless grinding to achieve diameter tolerances of ±0.002" and surface finishes down to Ra 0.4 μm for precision applications. Custom packaging in protective caps and VCI wrapping prevents handling damage during transit.

Get a Competitive Quote for Stainless Steel Round Bar

Contact our technical sales team today to receive mill-direct pricing on ASTM A276 compliant round bars tailored to your project specifications. We provide comprehensive support including material selection guidance, mechanical property verification, and logistics coordination to ensure on-time delivery. Request your quotation now and experience the value of partnering with a certified supplier committed to quality and service excellence.