309 stainless steel bar is a high alloy stainless steel with good high temperature resistance and corrosion resistance, and is widely used in high temperature equipment and pipelines.
Have questions? GNEE sales representatives are available for live chat now
Gnee Steel (Tianjin) Co., Ltd. is one of the most professional manufacturers and suppliers of 309 / 309s stainless steel round bar in China. With abundant experience, we warmly welcome you to wholesale customized 309 / 309s stainless steel round bar from our factory. For price consultation, contact us.
If you are looking for high-temperature austenitic stainless steel round bars suitable for industrial furnaces, heat treatment equipment, boiler components, petrochemical facilities, and high-temperature structural applications, 309 stainless steel round bars offer excellent oxidation resistance, moderate corrosion resistance, and stable strength at elevated temperatures. We provide factory-direct, certified, and customizable solutions to meet your project requirements.
We specialize in supplying ASTM International compliant materials manufactured according to ASTM A276 and ASTM A479 standards, including AISI 309 / 309S (UNS S30900 / S30908, EN 1.4828) stainless steel round bars. With a chromium content of 22.0–24.0% and nickel content of 12.0–15.0%, 309 stainless steel forged square bars offer good machinability and can undergo both hot and cold processing with minimal risk of defects.
309S stainless steel bars feature a carbon content ≤0.08%, which enhances weldability and improves resistance to intergranular corrosion. They can withstand continuous service temperatures up to 1000°C and are commonly used in high-temperature furnace tubes and other heat-resistant components. In general industrial atmospheres and mildly acidic or alkaline environments, they demonstrate reliable corrosion resistance.
Our product range includes Stainless Steel 309 Hollow Bars, 309 Steel Threaded Bars & Rods, SS 309 Round Rods, SS UNS S30900 Round Rods, SS DIN 1.4828 Round Bars, 309 Stainless Steel Cold Finished Round Bars, and more. All products are available with bright annealed and polished surface finishes. Diameters range from 6 mm to 300 mm, with lengths from 1 meter to 6 meters. We also offer customized cutting, chamfering, and heat treatment services to meet specific application needs.
The materials we supply are fully verifiable, from raw material test certificates to final dimensional declarations. (Reports will be shown on request) Factory delivery while minimizing manufacturing time.
Tests we perform (both destructive and non-destructive):
Massive testing, Chemical inspection - Spectroscopic analysis, Hardness testing, Pitting protection testing, Impact analysis
Eddy current testing, Hydrostatic analysis.
SS 309 Round Rods Supplier
DIN 1.4828 Round Bar Manufacturer
China Round Bar Stainless Steel 309 Packaging
Our stainless steel bar packaging is designed to ensure maximum protection, structural stability, and compliance with international export standards. Bars are typically bundled in units weighing 100 kg to 2,000 kg, depending on diameter (commonly 6mm to 500mm) and length (up to 6 meters). Each bundle is tightly secured with 3–6 steel straps, wrapped in waterproof plastic film and anti-rust kraft paper, and protected with edge guards to prevent surface damage during handling and transportation.
Stainless steel bar sea freight packaging
Stainless steel bar industrial packaging
Customer feedback
Our customers have consistently praised our stainless steel bars for their fast delivery, consistent quality, and high standards. With a robust production capacity exceeding 3,000 tons per month and a standard inventory covering common grades such as 201, 304, 316L, and 410, ranging in diameter from 6mm to 300mm, we can reduce the average delivery time for in-stock products to 5-10 days and for customized products to 15-20 days.
