Stainless Steel 304 Round Bar | Stainless Steel 304L Round Bar

Understanding the working characteristics of 304 stainless steel bar is essential for specifying the correct product form and processing route. The table below summarises the key fabrication and in-service properties of SS 304 round bar stock.

“Contact Jade Special Metals today with your requirement for 304 Stainless Steel Round Bars and 304L SS Rods. We assure you of the best quote.

Standard weight per metre values for stainless steel 304 round bar. Use for procurement estimation and stock planning. For unlisted diameters, use the Metal Weights Calculator on the Jade Alloys website.

Cold finished (cold drawn) stainless steel 304 round bar is produced to close dimensional tolerances per ASTM A276 and EN 10278. Standard tolerance grades for cold drawn bar are h9, h10, and h11. For precision-ground bar, h8 is achievable. All tolerance specifications are available on request and can be confirmed on the Mill Test Certificate.

Hot rolled 304 stainless steel round bar is produced to ASTM A276 Table 3 tolerances and EN 10060 for the European market. Standard ovality and straightness tolerances apply for diameters above 25mm. For tight-tolerance requirements on hot rolled bar, specify peeled and turned (P&T) finish at the time of enquiry.

The primary difference between 304 and 304L stainless steel round bar is carbon content. SS 304 has a maximum carbon of 0.07%, while 304L stainless steel bar is limited to 0.03%. This lower carbon makes 304L stainless bar the preferred choice for welded fabrications, where carbide precipitation at grain boundaries — known as sensitisation — can reduce corrosion resistance in the heat-affected zone. For non-welded applications, standard 304 stainless steel bar offers equivalent performance at comparable pricing. In most cases, 304L round bar can be dual-certified as 304/304L when both the 304 and 304L chemistry and mechanical requirements are met.

The corrosion resistance of stainless steel 304 round bar derives primarily from its passive chromium oxide surface film, which self-heals when damaged in oxidising environments. Key resistance characteristics include:

• Atmospheric corrosion: Excellent resistance in rural, urban, and mild industrial atmospheres.
• Aqueous environments: Resistant to fresh water, water vapour, and steam at moderate temperatures.
• Chemical resistance: Resistant to most organic acids including acetic, citric, lactic, and formic acid. Not recommended for hydrochloric acid or sulfuric acid in concentrations above 10%.
• Food and beverage: Complies with FDA food contact requirements; widely specified for dairy, brewing, and food processing equipment.
• Oxidising acids: Resistant to dilute nitric acid; not suitable for hot concentrated nitric acid environments.
• Chloride environments: Grade 304 has limited resistance to pitting in chloride-rich environments. For coastal, marine, or high-chloride applications, SS 316/316L is recommended.
• Intergranular corrosion (304L): The low carbon content of 304L stainless bar eliminates sensitisation risk in the heat-affected zone after welding — no post-weld annealing required.

Pricing for 304 stainless steel bar varies based on diameter, length, surface finish, and the current LME nickel index. Nickel typically represents 25 to 30% of the material cost, meaning stainless steel 304 round bar prices move in line with LME nickel. 304L stainless steel round bar is typically priced at a marginal premium over standard 304 due to tighter carbon controls in production. Contact Jade Alloys for a current 304 stainless steel bar price list with no minimum order quantity.

Jade Alloys offers a range of in-house and partner processing services on SS 304 and 304L bar stock, enabling customers to receive cut-to-size, finished material ready for use or further fabrication.

• Precision bar cutting to length (up to 650mm)
• Centreless grinding to close diameter tolerances
• Peeling, turning, and polishing to customer surface specifications
• Heat treatment: annealing, solution annealing
• Cut-to-size round, flat, hex, and square bar from stock
• Custom bundling and export packing (seaworthy crates, pallets)
• Dual certification (304 / 304L) on qualifying mill heats
• NABL lab testing and third-party inspection coordination

Jade Alloys maintains ready stock across multiple product forms, grade variants, and international standards to ensure fast dispatch to clients in the Gulf, Asia, and Europe.

Stainless steel 304 round bar is specified across a broad range of industries due to its combination of corrosion resistance, formability, and hygienic surface properties.

• Food Processing and Dairy Equipment — 304 stainless steel round bar is specified for its non-reactive surface and ease of sanitation. FDA-compliant for direct food contact.
• Chemical and Petrochemical Processing — the 18% chromium content provides resistance to a broad range of organic acids and mild alkalis.
• Marine and Offshore Structures — 304L stainless bar is selected where post-weld sensitisation must be avoided without heat treatment. For enhanced chloride resistance, also see SS 316/316L Round Bar.
• Oil and Gas Fabrication — used in valve bodies, pump shafts, instrument fittings, and structural members in moderate-duty service.
• Architecture and Construction — 304 round bar used for handrails, balustrades, structural supports, and decorative features.
• Pharmaceutical Manufacturing — hygienic finishes and passivation capability make 304 bar a standard in pharmaceutical process equipment.
• Power Generation — used in heat exchanger support structures, condenser components, and instrumentation fittings.
• Paper and Pulp Industry — resistant to the mild acids and alkalis encountered in pulp processing.
• Heat Exchangers and Pressure Vessels — ASTM A479 GR 304 bar is specified for pressure vessel service; 304L preferred where welding is involved.
• General Engineering and Fabrication — the most versatile 304 stainless round bar application, covering shafts, pins, bolts, machined components, and support structures.

The HSN (Harmonised System of Nomenclature) code for stainless steel round bars under Indian customs is:

HSN codes are used for Indian GST classification and export documentation. Jade Alloys provides complete export documentation including commercial invoice, packing list, certificate of origin, and EN 10204 3.1 MTC for all shipments.

Jade Alloys exports stainless steel 304 round bar and 304L stainless steel round bar from Mumbai to clients across 50 plus countries. Primary dispatch ports include:

• Jawaharlal Nehru Port Trust (JNPT / Nhava Sheva), Maharashtra — primary export port
• Mumbai Port, Maharashtra
• Mundra Port, Gujarat
• Deendayal Port (Kandla), Gujarat
• Chennai Port, Tamil Nadu

Key export destinations include the UAE, Saudi Arabia, Qatar, Kuwait, Oman, Bahrain, Singapore, Malaysia, Indonesia, Vietnam, Germany, the UK, Italy, the Netherlands, Australia, and the USA. Jade Alloys provides Phytosanitary Certificates, Certificate of Origin (CoO), ECGC documentation, and destination-specific test reports on request.

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