ASTM A276 304 Stainless Steel Round Bar UNS S30400

The 304 Stainless Steel Round Bar is a solid cylindrical bar manufactured from Grade 304 stainless steel, widely used in machinery manufacturing, architectural decoration, chemical equipment, and food processing industries. This product strictly complies with the Chinese GB 0Cr18Ni9 standard and the American ASTM standard, offering exceptional corrosion resistance, high-temperature stability, and excellent mechanical machining properties.

304 stainless steel has a dense austenitic structure, good thermal stability, low thermal conductivity, and relatively high electrical resistivity. Its combination of corrosion resistance, formability and mechanical strength makes it widely used for stainless steel round bars, shafts, fasteners, machined components and general industrial applications.
 

For ASTM A276 UNS S30400 304 stainless steel round bar, the mechanical properties are typically presented as follows:

304 stainless steel combines good tensile strength, high ductility and excellent formability. Its austenitic structure allows it to withstand forming, bending and machining operations while maintaining good corrosion resistance.
 

304 stainless steel round bar is widely used in industrial, commercial and fabrication applications because of its excellent corrosion resistance, good strength, ductility and weldability.

Our 304 stainless steel round bars are manufactured through controlled hot-rolling or cold-drawing processes according to the required diameter, surface finish and application.

The production process generally includes raw material selection → melting and refining → continuous casting → hot rolling → heat treatment → pickling or surface processing → cold drawing when required → straightening → cutting → dimensional inspection → final quality inspection → packaging and shipment.

Hot-rolled 304 stainless steel round bars are suitable for larger diameters and general machining applications. Cold-drawn bars are produced through additional drawing and straightening processes to achieve tighter dimensional tolerances, improved surface finish and better dimensional accuracy.

Each production stage is controlled to ensure consistent chemical composition, mechanical properties, dimensions and surface quality. Inspection can include chemical composition analysis, tensile testing, hardness testing, dimensional inspection and surface inspection.
 

304 stainless steel round bars are carefully packed to prevent surface damage, deformation and contamination during transportation.

Standard packing typically includes bundling with steel strips, protective plastic wrapping and waterproof packaging. Bars can also be packed in wooden cases or wooden pallets when additional protection is required.

Standard length is commonly 6 meters, while custom cut lengths can be supplied according to customer requirements. Different diameters can be bundled separately and clearly marked with material grade, size, quantity, heat number and other shipping information.

Export packaging can be customized according to the transportation method and destination requirements, including container loading and seaworthy export packing.

We supply ASTM A276 304 stainless steel round bar in both hot-rolled and cold-drawn conditions, covering a wide diameter range for different industrial and machining requirements.

Wide Size Range
We offer hot-rolled diameters from approximately 5.5–130 mm and cold-drawn diameters from 1–30 mm, with custom sizes available upon request.

Multiple Surface Options
Bright polished and black hot-rolled surfaces are available for different applications, from decorative components to industrial machining.

Reliable Material Quality
Material is supplied according to recognized standards and can be provided with Mill Test Certificates (MTC) for chemical composition and mechanical properties.

Custom Cutting Service
We can supply standard 6-meter bars as well as custom cut-to-length products according to drawings or project requirements.

Strict Quality Control
Products are inspected for chemical composition, mechanical properties, diameter, straightness, surface condition and overall quality before shipment.

Q: What is the corrosion resistance of 304 Stainless Steel Round Bar?
A: Containing 18-20% Chromium and 8-11% Nickel, 304 stainless steel forms a dense chromium oxide passive layer, providing good resistance to most oxidizing acids and atmospheric corrosion.

Q: How to choose between Bright and Black surface finishes?
A: Bright finish offers a smooth, aesthetic surface suitable for direct-use decorative and precision parts. Black finish, with its oxide layer, is ideal for industrial applications requiring further processing or where surface appearance is less critical.

Q: Do you provide custom sizes outside standard specifications?
A: Yes, we support customization of diameter, length, and tolerance. Please consult our sales team for minimum order quantities (MOQ).

Q: What is the lead time after order confirmation?
A: Standard specification products are typically in stock and can be dispatched within 3-5 working days. Custom products require a production lead time of 15-30 days, depending on order volume.

Q: Are your products compliant with international standards?
A: Our products comply with various international standards, including Chinese GB, American ASTM, Japanese JIS, German DIN, and European EN standards. Relevant certifications can be provided.

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