Stainless Steel Flat Bar - AISI 304/316, Precision-Cut, Mill-Tested for Industrial Applications

Feihong Steel Co., Ltd.

Verified Custom manufacturer · 6 yrs ·

China

Customizable Rock-bottom price

$1985 1-49 ton Base price

$1895 50-99 ton 4.5% off

$1855 ≥100 ton 6.5% off

Price validity: subject to market conditions

Supplier's customization ability

Drawing-based customization
Sample-based customization
Full customization

Quantity

Minimum order quantity: 1 ton

Shipping total: To be negotiated

Subtotal of goods US$ 1,985.00

Start order request

Payment and delivery

Payment:: by contract — deposit, balance after your inspection
Lead time:: confirmed with the quotation
Packaging:: standard export packing
Samples:: available on request

Product details

Technical Specifications of Stainless Steel Flat Bar

Property	Parameter	Description
Product Name	Stainless Steel Flat Bar	Rectangular cross-section austenitic stainless steel bar
Common Material Grades	304 / 304L / 316 / 316L / 2205 / 430	ASTM A276, EN 10088-3, JIS G4303 equivalents
Standard Compliance	ASTM A276, EN 10088-3, GB/T 1220, JIS G4303	Meets international dimensional and metallurgical standards
Carbon Content (304L)	≤0.03%	Low carbon for enhanced weldability and intergranular corrosion resistance
Chromium (Cr) – 304	18.0–20.0%	Primary element for passive oxide layer formation
Nickel (Ni) – 304	8.0–10.5%	Ensures austenitic structure, ductility, and toughness
Molybdenum (Mo) – 316L	2.0–3.0%	Improves pitting and crevice corrosion resistance in chloride environments
Tensile Strength (304)	≥515 MPa	Minimum per ASTM A276 annealed condition
Yield Strength (304)	≥205 MPa	0.2% offset yield strength, annealed
Elongation	≥40%	Measured on 50 mm gauge length (ASTM A276)
Thickness Range	3 – 100 mm	Standard hot-rolled and cold-finished options
Width Range	10 – 300 mm	Custom widths available upon request
Surface Finish	Hot Rolled (No.1), 2B, BA, Pickled, Polished	Varies by grade and application requirements
Application	Architectural cladding, machinery frames, chemical processing, marine hardware	Widely used in corrosive, structural, and decorative applications
Certification	EN 10204 3.1, Mill Test Report (MTR), ISO 9001	Traceable material certification with chemical & mechanical test data
Packaging	Steel-banded bundles, waterproof paper, wooden pallets	Export-standard protection against moisture and handling damage
MOQ	500 kg (standard grades), 1 ton (special grades)	Minimum order quantity varies by specification and availability

Stainless Steel Flat Bar - AISI 304/316, Precision-Cut, Mill-Tested for Industrial Applications

Stainless steel flat bar is a versatile, dimensionally precise long product widely employed in structural fabrication, machinery components, architectural cladding, and corrosion-resistant equipment across global industrial sectors. Engineered for superior mechanical consistency and surface integrity, this mill-direct stainless steel flat bar delivers premium-grade performance at factory-competitive pricing—making it the preferred choice for OEMs, fabricators, and infrastructure contractors seeking reliable material supply with zero compromise on traceability or compliance.

What is Stainless Steel Flat Bar?

Stainless steel flat bar is a hot-rolled or cold-finished solid-section steel product characterized by a rectangular cross-section with precisely controlled width and thickness tolerances (typically ±0.1 mm per EN 10058:2005). Unlike round or square bars, its flat geometry provides optimal surface contact for welding, bolting, and mechanical fastening. Manufactured in accordance with ASTM A276/A276M-22a for chemical composition and mechanical properties, and certified to EN 10204 Type 3.1 for full material traceability, stainless steel flat bar maintains uniform microstructure, excellent surface finish, and consistent grain flow—ensuring predictable behavior during machining, bending, and high-cycle fatigue loading.

Stainless Steel Flat Bar Technical Specifications

Our stainless steel flat bar is available in two primary grades—AISI 304 (1.4301) and AISI 316 (1.4401)—each meeting stringent international standards. AISI 304 flat bar features a nominal composition of 18.0–20.0% Cr, 8.0–10.5% Ni, and max 0.08% C, delivering outstanding anti-corrosion properties in atmospheric and mildly aggressive environments. AISI 316 flat bar adds 2.0–3.0% Mo and tightens carbon content to ≤0.03% (316L variant), providing exceptional durability against corrosion in chloride-rich settings such as coastal infrastructure, chemical processing vessels, and pharmaceutical plant fittings. Both grades exhibit tensile strength of ≥515 MPa (ASTM A240 minimum), yield strength ≥205 MPa, elongation ≥40% in 50 mm, and hardness ≤201 HBW. All bars are supplied in annealed condition (solution-treated at 1010–1120°C followed by rapid quenching) to ensure optimal fusion properties and superior weld performance.

stainless steel flat bar supplier

Frequently Asked Questions

What is the minimum order quantity (MOQ)?

The standard MOQ for stainless steel flat bar is 500 kg per grade and size, supporting both prototyping batches and mid-volume production runs.

Do you provide material test certificates?

Yes—we issue EN 10204 Type 3.1 mill test certificates with every shipment, detailing heat number, chemical analysis per ASTM E1086, tensile test results per ASTM A370, and dimensional verification per ISO 286-1.

What is the typical delivery time?

For in-stock sizes (up to 60 mm width × 12 mm thickness), lead time is 3–5 working days; custom-cut or non-standard dimensions require 10–15 days from order confirmation.

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Can you cut to custom sizes?

Absolutely—we offer precision saw-cutting services with ±0.5 mm length tolerance, deburring, edge chamfering, and surface passivation per ASTM A967, enabling ready-to-weld delivery for your fabrication workflow.

Why Choose Our Stainless Steel Flat Bar?

We specialize in stainless steel flat bar supply for mission-critical applications where dimensional fidelity and metallurgical reliability directly impact structural safety and service life. With over 18 years of B2B steel distribution experience, our inventory is sourced exclusively from ISO 9001-certified mills in Germany, South Korea, and Taiwan—ensuring full compliance with ASTM A276, EN 10088-2:2014, and JIS G4303. Unlike generic suppliers, we maintain real-time stock visibility across 37 standard widths (10–150 mm) and 12 thicknesses (3–25 mm), backed by laser-measured QA documentation for every coil and bundle. Our technical team supports grade selection based on environmental exposure—recommending 304 for general-purpose food-grade conveyors or façade framing, and 316L for marine railings, desalination plant brackets, or sterile process piping supports.

Get a Competitive Quote for Stainless Steel Flat Bar

Request your no-obligation, mill-verified quotation today—and receive a detailed commercial proposal within 24 hours, including landed cost breakdown, logistics options (FOB, CFR, or DAP), and certification package details. We prioritize transparency, scalability, and engineering partnership—not just transactional supply.

stainless steel flat bar China

24/7 customer support available
Free samples for quality evaluation
Competitive pricing for bulk orders
Professional technical consultation

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Ratings & Reviews

4.5

Based on 10 reviews

5 6

4 3

3 1

2 0

1 0

Carlos Silva

Brazil

2025-03-25

Acceptable Quality AISI 316 Flat Bar with Minor Finish Issues Resolved

Acceptable product quality, with one issue resolved promptly. Ordered 11.6 tons of AISI 316 flat bar (45 mm × 6 mm, annealed) for pharmaceutical plant piping supports in São Paulo. EN 10204 3.1 certs confirmed full compliance. However, 5 pieces showed fine longitudinal grinding marks on one face—visible under angled lighting, though not impacting corrosion resistance. Supplier responded within 24 hours, dispatched replacement pieces with enhanced surface inspection, and provided a 3% discount on the invoice. They also shared revised QC photos for future orders. Suggest requesting ‘mirror-finish optional’ for aesthetic-critical applications. Fair outcome overall.

Ahmed Al-Hassan

UAE

2025-04-18

Decent AISI 304 Flat Bar for Infrastructure Projects

Decent product quality overall. Ordered 14.2 tons of AISI 304 flat bar (80 mm × 8 mm, cold-finished) for Dubai Metro station canopy supports. Material certs matched ASTM A276 requirements—Cr 18.4%, Ni 9.1%, tensile 535 MPa. Dimensional accuracy was excellent (±0.08 mm width), but 3 of 22 bundles had minor surface scuffing from handling—not affecting structural use. Supplier resolved it within 48 hours by issuing credit and adding protective corner guards for next order. Lead time and documentation were flawless. For large-scale infrastructure, value and traceability are strong. 4 stars because surface protection during inland logistics needs improvement.

Wei Chen

Singapore

2025-05-22

Solid AISI 316 Flat Bar for Southeast Asian Chemical Plants

Solid performance for aggressive environments. Ordered 10.5 tons of AISI 316 flat bar (30 mm × 10 mm, solution-treated, ASTM A967 passivated) for pipe support fabrication in a Singaporean chemical processing facility. Certificates verified Mo 2.33% and ferrite number

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Feihong Steel Co., Ltd.

6 yrs on Sinoali.com

Located in China

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After more than a decade of continuous investment and innovation, Feihong Steel Co., Ltd. has now developed into a leading enterprise in the industry with a complete industrial chain, a wide range of product specifications, prompt supply, excellent product quality, strong industry influence and good social reputation. Currently, our products are mainly sold to the eastern region of China and over 40 countries and regions, such as Southeast Asia, South Asia, West Asia, Eastern Europe, South America, etc. Our stainless steel series products have consistently ranked among the top in China for many years.