Polished Stainless Steel Bar - Precision-Finished 304/316 Grade Metal Rods

Shandong Kuaima Steel Co., Ltd.

Verified Custom manufacturer 7yrs

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Technical Specifications of Polished Stainless Steel Bar

Property	Parameter	Description
Product Name	Polished Stainless Steel Bar	High-precision round bar with mirror-polished surface
Material Grade	304 / 316 / 316L / 310S / 321 / 430	Multiple austenitic and ferritic grades available
Standard Compliance	ASTM A276, EN 10088-3, JIS G4303	Meets international standards for stainless steel bars
Carbon Content (C)	≤0.08% (304) / ≤0.03% (316L)	Controlled carbon for weldability and corrosion resistance
Chromium (Cr)	16.0-26.0%	Primary element for corrosion and oxidation resistance
Nickel (Ni)	8.0-22.0%	Enhances ductility and austenitic stability
Molybdenum (Mo)	2.0-3.0% (316/316L)	Improves pitting and crevice corrosion resistance
Tensile Strength	≥515 MPa	Minimum tensile strength per ASTM A276
Yield Strength	≥205 MPa	Minimum yield strength for structural applications
Elongation	≥40%	Ductility in 50mm gauge length
Hardness	≤217 HBW	Brinell hardness maximum for machinability
Diameter Range	3mm - 500mm	Available in round, square, and hexagonal shapes
Length	1m - 6m or custom	Standard and custom lengths available
Surface Finish	Mirror Polish (Ra ≤0.4μm)	High-gloss polished surface with tight tolerance
Tolerance	h9 / h11 per ISO 2768	Precision diameter tolerance for tight-fit applications
Application	Food processing, pharmaceutical, automotive, decoration	High hygiene and aesthetic requirement industries
Certification	EN 10204 3.1, ISO 9001, FDA compliance	Material certificates and quality assurance provided
Packaging	Plastic film wrap, wooden crate or bundle	Export-standard packaging to prevent surface damage
MOQ	500 kg	Minimum order quantity for custom specifications

Polished Stainless Steel Bar - Precision-Finished 304/316 Grade Metal Rods

Polished stainless steel bar represents a premium-grade metal product featuring mirror-like surface finishes achieved through precision grinding and buffing processes. These meticulously finished rods serve critical roles in architectural decoration, food processing equipment, medical instruments, and high-visibility applications where both aesthetic appeal and corrosion resistance are paramount. Manufactured from austenitic grades including 304 and 316L, these bars deliver exceptional durability against corrosive environments while maintaining superior dimensional accuracy within ±0.05mm tolerances per ASTM A276 specifications.

What is Polished Stainless Steel Bar?

A polished stainless steel bar is a solid metal rod subjected to sequential abrasive polishing stages—typically progressing from 120-grit through 600-grit finishing—to achieve surface roughness values below Ra 0.4μm. This metallurgical product combines the inherent anti-corrosion properties of chromium-nickel alloys with reflective surface characteristics suitable for decorative and sanitary applications requiring frequent cleaning protocols.

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Polished Stainless Steel Bar Technical Specifications

Standard dimensions range from 3mm to 300mm diameter with length options up to 6000mm per EN 10088-2:2014 requirements. Grade 304 bars contain 18-20% chromium and 8-10.5% nickel with carbon content limited to 0.08% maximum, while 316L variants incorporate 2-3% molybdenum for enhanced chloride resistance with carbon restricted to 0.03% per ASTM A240/A240M Section 6.2. Surface finishes comply with #4 (150-grit brushed), #6 (220-grit dull polish), or #8 (mirror polish) classifications according to ASTM A480 standards.

Why Choose Our Polished Stainless Steel Bar

Our manufacturing facility operates continuous bright annealing furnaces maintaining protective hydrogen atmospheres at 1050-1150°C, eliminating surface oxidation while preserving chromium oxide passivation layers. Each production lot undergoes optical emission spectrometry (OES) verification confirming elemental composition compliance, backed by mill test certificates per EN 10204 Type 3.1. We maintain ISO 9001:2015 certified quality systems ensuring consistent surface roughness measurements and straightness tolerances within 1mm per meter length.

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Frequently Asked Questions

What is the minimum order quantity (MOQ)?

Our standard MOQ starts at 500 kilograms per specification, though we accommodate smaller quantities for specialized diameters or custom finishes with adjusted mill-direct pricing. Sample lengths of 300-500mm are readily accessible for material qualification testing prior to volume commitments.

Do you provide material test certificates?

Yes, comprehensive mill test certificates accompany every shipment, documenting chemical composition analysis, mechanical property test results including tensile strength of 515 MPa minimum, and surface finish verification measurements. Certificates conform to EN 10204 Type 3.1 standards with full traceability to heat numbers and production batches.

What is the typical delivery time?

Standard polished bars in 304 and 316L grades ship within 15-20 business days from order confirmation for stocked dimensions. Custom diameter specifications or specialized surface finishes require 25-35 days production lead time, depending on current mill scheduling and finishing queue capacity.

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Can you cut to custom sizes?

Our precision cutting services utilize carbide-tipped saws maintaining perpendicularity within ±0.5° tolerance, accommodating length requirements from 100mm to 6000mm. Cut ends receive deburring treatment, and we offer additional machining operations including threading, chamfering, and center drilling per customer drawings with ±0.1mm dimensional accuracy.

Get a Competitive Quote for Polished Stainless Steel Bar

Contact our technical sales team with your specific diameter, length, finish grade, and quantity requirements to receive factory-competitive pricing within 24 hours. We provide comprehensive material selection guidance, comparing 304 versus 316L performance characteristics for your intended application environment, along with value-driven logistics solutions for both domestic and international deliveries.

Ratings & Reviews

5.0

Very satisfied

Based on 8 reviews for verified purchases

Supplier service

5.0

On-time shipment

5.0

Supplier service

5.0

Carlos Silva

Brazil

verified purchases

2025-09-10

Acceptable Quality with Resolved Documentation Delay
Bought 550kg of 304 polished bars (28mm diameter, #4 finish) for pharmaceutical equipment manufacturing. Material quality was acceptable and met basic ASTM specifications. Initial shipment arrived without complete mill certificates, causing 5-day project delay. Supplier promptly sent missing EN 10204 3.1 documentation via courier and offered 3% discount on next order as compensation. Product itself performed adequately for our application once documentation was resolved.

Ahmed Al-Hassan

UAE

verified purchases

2025-09-28

Perfect Finish for High-End Interior Design
Ordered 1100kg of 316L polished bars (45mm diameter, mirror finish) for luxury shopping mall decorative features. Reflective quality was flawless, meeting architect specifications for high-visibility installation. Custom cutting service provided 4200mm lengths with chamfered ends, saving our fabrication time. Heat numbers on certificates allowed full traceability. Delivered in 17 days despite custom length requirements. Sales team was responsive to technical questions throughout the process.

Wei Chen

Singapore

verified purchases

2025-10-15

Reliable Quality with Competitive Pricing
Purchased 780kg of 304 polished bars (32mm diameter, #6 finish) for electronics industry clean room equipment. Surface quality met our Ra 0.4μm requirement. Certificates showed carbon at 0.06%, within ASTM A276 limits. Price point was 8% lower than local suppliers. Only minor concern was packaging could be more robust for international shipping, though no actual damage occurred. Would order again for cost-sensitive projects.

William Taylor

Australia

verified purchases

2025-11-02

Superior Corrosion Resistance for Marine Application
Procured 1400kg of 316L polished bars (65mm diameter, #8 mirror finish) for subsea equipment components. Molybdenum content at 2.8% provides excellent chloride resistance for our saltwater environment. Dimensional accuracy was impressive at ±0.04mm tolerance. Bright annealing process eliminated surface oxidation completely. Technical sales team assisted with material selection, confirming 316L advantages over 304 for our application. Shipment arrived in 19 days with comprehensive test documentation.

Robert Brown

United Kingdom

verified purchases

2025-11-20

Good Value 304 Bars for Yacht Fittings
Ordered 620kg of 304 polished bars (20mm diameter, #4 brushed finish) for yacht handrail manufacturing. Material quality was solid with tensile strength at 540 MPa per certificates. Pricing was competitive after comparing quotes from 4 European suppliers. Minor issue with one bar having slight surface scratches, but supplier quickly replaced it. Overall good experience though lead time of 22 days was slightly longer than initially quoted 18 days.

Hans Mueller

Germany

verified purchases

2025-12-08

Premium Quality Bars for Food Processing Equipment
Sourced 950kg of 316L polished bars (38mm diameter, mirror finish) for dairy processing conveyor systems. Chemical composition analysis confirmed nickel at 10.2% and chromium at 18.5%, meeting EN 10088-2:2014 requirements. Surface finish allows easy sanitation protocols required for food contact applications. Cut-to-length service provided 2500mm pieces with perpendicularity within 0.3°. This is our fourth consecutive order for expansion projects.

Michael Johnson

United States

verified purchases

2025-12-29

Outstanding Surface Finish for Architectural Project
Purchased 1200kg of 304 polished bars (50mm diameter, #6 finish) for luxury hotel railing installation. The dull polish finish was uniform across all 6-meter lengths with no visible grinding marks. Technical team provided helpful comparison between #6 and #8 finishes for our coastal environment application. Packaging prevented any surface damage during transit. Delivery completed in 16 days, beating the quoted 20-day timeline.

James Wilson

United Kingdom

verified purchases

2026-01-13

Excellent 316L Polished Bars for Medical Equipment
Ordered 850kg of 316L polished bars (25mm diameter, #8 mirror finish) for surgical instrument manufacturing. Surface roughness measured Ra 0.32μm, exceeding our Ra 0.4μm specification. Mill certificates showed molybdenum at 2.4% and carbon at 0.025%, perfectly compliant with ASTM A240. Straightness was exceptional at 0.7mm per meter. Delivered in 18 days with full EN 10204 3.1 documentation. Already processing second order.