Stainless Steel 304 Parts & CNC Machined SS 304 Components

At Jamnagar Brass Components, we manufacture precision Stainless Steel 304 parts and CNC machined SS 304 components for demanding industrial applications. With decades of machining expertise and modern CNC turning and milling centres, we supply American, European, and global clients with tight-tolerance SS 304 parts in custom geometries. As a dedicated Stainless Steel 304 parts manufacturer from India, we offer competitive pricing, ISO 9001:2015 quality, and reliable lead times for both prototype and high-volume orders.

What is Stainless Steel 304?

Stainless Steel 304 is the most widely used austenitic stainless steel in the world. It contains approximately 18% chromium and 8% nickel (hence also called 18/8 stainless), giving it excellent corrosion resistance, good formability, and strong weldability. It resists oxidation and scaling, performs reliably in temperatures up to 870 °C intermittently, and is fully non-magnetic in the annealed condition — making it the go-to choice for food equipment, chemical processing, and architectural components.

SS 304 Material Grades — International Equivalents

Jamnagar Brass Components sources certified bar, rod, and sheet material conforming to international standards. The table below shows SS 304 cross-references used on technical drawings from US and global customers:

Standard	Grade	Region
UNS (ASTM)	S30400	USA
EN / DIN	1.4301 (X5CrNi18-10)	Europe
BS	304 S31	UK
JIS	SUS 304	Japan
IS	04Cr18Ni10	India
GOST	08Х18Н10	Russia

CNC Machined Stainless Steel 304 Parts We Manufacture

Our CNC machining facility produces a broad range of SS 304 components with tolerances as tight as ±0.01 mm. The parts listed below are regularly supplied to US OEMs, distributors, and engineering firms:

Stainless Steel 304 Turned Parts

CNC turned SS 304 components include bushings, standoffs, spacers, pins, shafts, studs, and hollow cylinders. We operate Swiss-type and conventional CNC lathes capable of producing components from 2 mm to 150 mm diameter.

Stainless Steel 304 Milled and Prismatic Parts

Complex 3D and 4-axis milled parts in SS 304 — brackets, valve bodies, flanges, manifolds, clamps, and housings — are produced on our Mazak and Haas VMC machines with DXF/STEP file inputs.

Stainless Steel 304 Fasteners and Hardware

We manufacture custom bolts, nuts, screws, set screws, and washers in SS 304 to ASME, DIN, or custom drawings, including special head forms and drive configurations not available off-the-shelf.

Stainless Steel 304 Tube and Pipe Fittings

Machined fittings such as elbows, tees, nipples, unions, and compression fittings in SS 304 are commonly supplied to plumbing, dairy, and chemical plant customers in the USA and UK.

Stainless Steel 304 Stampings and Pressings

From simple brackets and clips to deep-drawn shells and multi-stage progressive stampings, our press shop handles SS 304 sheet from 0.5 mm to 6 mm thickness.

Applications of Stainless Steel 304 Machined Parts

• Food processing and dairy equipment — hygienic, easy-to-clean surfaces
• Chemical and petrochemical plant fittings and valves
• Pharmaceutical machinery components
• Architectural and decorative hardware
• Marine fittings (in low-chloride environments)
• Medical instrument components
• Oil and gas industry fittings
• HVAC and refrigeration equipment

Manufacturing Capabilities for SS 304 Parts

Our facility in Jamnagar, Gujarat, India is equipped with multi-axis CNC lathes, vertical machining centres, wire-EDM, surface grinders, and hydraulic presses. We maintain full traceability from raw material certification through in-process inspection (CMM, profile projector, hardness tester) to final inspection reports. All SS 304 raw material is sourced with Mill Test Certificates (MTC) to ASTM A276 / A479 standards and EN 10088 for European specifications.

Why Choose Jamnagar Brass Components for SS 304 Parts?

• ISO 9001:2015 Certified — rigorous quality management at every stage
• 25+ years of precision machining — extensive experience with stainless alloys
• Tight tolerances — CNC machining to ±0.01 mm on turned and milled parts
• Material certification — all SS 304 supplied with MTC and chemical/mechanical test reports
• Custom quantities — prototypes from 1 pc to mass production of 100,000+ pcs
• Surface finishing — passivation, electro-polishing, bead blasting, mirror finish available
• Competitive pricing — India-based manufacturing with significant cost advantage for USA buyers
• Fast shipping — air freight and sea freight options to all US ports

Frequently Asked Questions — SS 304 Parts

Q1: What is the difference between SS 304 and SS 316?

SS 316 adds 2–3% molybdenum to the standard 18/8 chromium-nickel formula, significantly improving resistance to chloride pitting and crevice corrosion. For marine, coastal, and chemical plant environments with chloride exposure, 316 is the preferred choice. For food processing, architectural, and general industrial applications, SS 304 is entirely sufficient and considerably more economical.

Q2: Can you machine SS 304 to ASTM A276 standard?

Yes. We source SS 304 bar and rod per ASTM A276 (bars and shapes) and ASTM A479 (bars for pressure vessels). All material is supplied with Mill Test Certificates confirming chemical composition and mechanical properties to ASTM requirements. We also supply to EN 10088-3 (grade 1.4301) for European customers.

Q3: What surface finishes are available on SS 304 machined parts?

Available finishes include: as-machined (Ra 1.6–3.2 µm), passivation per ASTM A967 using citric or nitric acid processes, electro-polishing for pharmaceutical and hygienic components (Ra ≤ 0.4 µm), bead-blasted matte finish, and bright mirror polishing for decorative applications. Surface roughness reports are supplied on request.

Q4: What tolerances can you hold on CNC machined SS 304 components?

We routinely hold ±0.01 mm on CNC turned diameters and ±0.02 mm on bored holes in production quantities. For precision applications, IT5/IT6 tolerance class (±0.008–0.013 mm for mid-range sizes) is achievable with post-turning cylindrical grinding. Flatness and parallelism to 0.01 mm on face-ground components is standard.

Q5: What is the minimum order quantity for SS 304 machined parts?

We accept orders from 50 pieces for most standard machined components. For complex parts requiring dedicated tooling or fixtures, typical minimums are 100–500 pieces. Prototype and sample orders from 1–10 pieces are accepted at prototype pricing, enabling full design and dimensional validation before committing to production quantities.

Q6: Do you supply SS 304 parts with full material traceability?

Yes. Full material traceability is maintained from raw material heat number through all manufacturing stages to final inspection. Each shipment includes a Mill Test Certificate (MTC), Certificate of Conformance (CoC), and dimensional inspection report. Third-party inspection by SGS, Bureau Veritas, or TÜV can be arranged on request at additional cost.

Q7: Is SS 304 suitable for food contact and FDA-compliant applications?

Yes. SS 304 (UNS S30400) is widely accepted for food contact applications and complies with FDA 21 CFR regulations and EU Regulation No. 10/2011. We supply passivated components with surface finish documentation. For pharmaceutical or clean-in-place (CIP) applications, we recommend electro-polished 316L for optimal cleanability.

Q8: Is SS 304 magnetic?

SS 304 in the fully annealed condition is essentially non-magnetic (relative permeability ~1.003–1.05). Cold working during machining can induce slight magnetism due to martensite formation in heavily deformed areas. If zero magnetism is critical — for example in MRI or sensitive instrument applications — specify 316L or a stabilised grade such as 321 or 347.

Q9: What is the maximum continuous operating temperature for SS 304?

SS 304 can be used continuously up to 870 °C in non-cyclic (oxidising) conditions and intermittently to 925 °C. For applications above 425 °C where weld zones are involved, SS 304L (low-carbon, max 0.03% C) is recommended to prevent sensitisation and intergranular corrosion in the heat-affected zone. For continuous service above 950 °C, grade 310S is more appropriate.

Q10: How do I get a quotation for custom SS 304 parts?

Email your 2D drawings (PDF or DXF) or 3D CAD files (STEP/IGES/SolidWorks format) to sales@jambrass.com along with your required material specification, quantity, tolerance class, and surface finish. Our engineering team will respond with a detailed quotation within 24 business hours. For standard turned and milled parts, indicative pricing can often be provided same day.