Brass Parts India extends its precision manufacturing expertise beyond brass and copper to offer Stainless Steel CNC Machining and Stainless Steel Machined Parts for export to the USA and global markets. Leveraging our advanced CNC infrastructure in Jamnagar and our access to a world-class supply chain, we deliver high-quality stainless steel components — turned parts, milled parts, threaded fittings, valve components, and custom assemblies — to OEMs, distributors, and industrial end-users seeking reliable Indian sourcing at highly competitive prices.
Our stainless steel machining capability covers grades 303, 304, 304L, 316, 316L, 410, 430, 17-4PH and duplex grades — in bar, plate, tube, and custom profile stock. Whether you need a simple turned bushing in 304 SS or a complex 316L valve body with multiple cross-drilled ports, Brass Parts India has the tooling, the experience, and the quality systems to deliver.
Stainless Steel Machined Parts We Manufacture
CNC Turned Stainless Steel Parts
Precision CNC turned components from stainless steel round bar: shafts, pins, axles, bushings, sleeves, spacers, standoffs, nozzles, nipples, ferrules, and custom rotational profiles. Diameters from 2 mm to 200 mm. Tolerances to ±0.01 mm. Surface roughness Ra 0.8–3.2 µm as standard; Ra 0.4 or better on request with polishing or grinding.
CNC Milled Stainless Steel Parts
3-axis and 4-axis CNC milled components from SS plate and bar: brackets, flanges, housings, manifolds, pump bodies, impeller casings, and structural parts. Flat tolerances to ±0.02 mm; positional tolerances to ±0.05 mm. Complex multi-surface geometries handled by our machining center fleet.
Stainless Steel Threaded Fittings and Fasteners
NPT and BSP threaded nipples, couplings, adapters, and hex plugs in 304 and 316 SS per ASME B16.11 / ASTM A182. Metric and UNC/UNF stainless steel bolts, studs, screws, and nuts per ASTM F593 and DIN 933/934. Available in passivated finish per ASTM A967.
Stainless Steel Valve Components
Ball valve balls, stems, seats, and bodies in 316/316L SS. Gate valve spindles and handwheels. Check valve discs. Needle valve bodies. All valve components hydrostatically tested and surface-finished per customer specifications.
Stainless Steel Pump and Impeller Parts
Centrifugal pump impellers, wear rings, shaft sleeves, and bearing housings in 304, 316, and duplex stainless steel. Manufactured by CNC turning and milling from bar or billet, or by investment casting followed by precision machining. Used in chemical processing, marine, food and pharmaceutical industries.
Stainless Steel Medical and Food-Grade Components
FDA-compliant 316L SS components for food processing, pharmaceutical, and medical device applications. Electro-polished surface finish to Ra ≤0.4 µm for hygienic requirements per 3-A Sanitary Standards and ASME BPE. Full material traceability and mill certification.
Stainless Steel Instrumentation and Sensor Parts
Precision turned and milled parts for pressure gauges, flow meters, temperature sensors, and analytical instruments. Tight tolerances on seal faces and port diameters. Available in 316L, 304, and 17-4PH for strength-critical sensor housings.
Custom Stainless Steel Parts to Drawing
Any stainless steel component from your 2D or 3D design files. We handle complex geometries, deep cross-drilled holes, internal profiles, and multi-start threads. From 1-off prototypes to mass production.
Stainless Steel Grades and International Equivalents
| AISI/UNS (USA) | EN (Europe) | BS (UK) | DIN (Germany) | JIS (Japan) | Key Properties |
|---|---|---|---|---|---|
| 303 / S30300 | 1.4305 / X8CrNiS18-9 | 303 S31 | X10CrNiS18-9 | SUS303 | Free-machining austenitic; best machinability in SS |
| 304 / S30400 | 1.4301 / X5CrNi18-10 | 304 S15 | X5CrNi18-10 | SUS304 | General-purpose austenitic; excellent corrosion resistance |
| 304L / S30403 | 1.4307 / X2CrNi18-9 | 304 S11 | X2CrNi18-9 | SUS304L | Low-carbon; for welded assemblies; no sensitization |
| 316 / S31600 | 1.4401 / X5CrNiMo17-12-2 | 316 S31 | X5CrNiMo17-12-2 | SUS316 | Mo-added; superior chloride/acid resistance; marine grade |
| 316L / S31603 | 1.4404 / X2CrNiMo17-12-2 | 316 S11 | X2CrNiMo17-12-2 | SUS316L | Low-carbon 316; for welded/pharmaceutical/food applications |
| 410 / S41000 | 1.4006 / X12Cr13 | 410 S21 | X12Cr13 | SUS410 | Martensitic; hardenable; good wear resistance |
| 430 / S43000 | 1.4016 / X6Cr17 | 430 S15 | X6Cr17 | SUS430 | Ferritic; magnetic; decorative and appliance use |
| 17-4PH / S17400 | 1.4542 / X5CrNiCuNb16-4 | — | X5CrNiCuNb16-4 | SUS630 | Precipitation-hardening; very high strength + corrosion resistance |
| 2205 Duplex / S32205 | 1.4462 / X2CrNiMoN22-5-3 | — | X2CrNiMoN22-5-3 | — | Duplex; double strength of 316L; excellent chloride resistance |
Stainless Steel CNC Machining Capabilities
- CNC Turning: 2-axis through 5-axis turning; live tooling; Y-axis milling; parts up to 200 mm dia. × 600 mm length
- CNC Milling: 3-axis and 4-axis vertical/horizontal machining centers; parts up to 600 × 400 × 300 mm
- Threading: Metric M1.6–M80; UNC, UNF, BSP, NPT, BSPT, ACME
- Drilling: Cross-drilled holes, deep holes (up to 20:1 L/D), angled holes
- Surface Finishing: As-machined, bead-blasted, passivated (ASTM A967), electropolished, vibratory polished
- Grinding: Cylindrical and surface grinding for critical tolerance features
- Material Sizes: Bar stock 2–200 mm dia.; plate up to 100 mm thick
Applications
- Chemical and petrochemical process equipment
- Marine and offshore hardware
- Food processing and beverage equipment
- Pharmaceutical and biotech manufacturing
- Medical devices and surgical instruments
- Oil and gas subsea and wellhead components
- Water treatment and desalination plants
- Semiconductor and cleanroom equipment
- Power generation and nuclear applications
- Automotive and aerospace structural parts
Why Choose Brass Parts India for Stainless Steel Machining?
- Multi-Alloy Capability: 303, 304, 316L, 17-4PH, duplex and more — all under one roof.
- Certified Material: Mill test certificates for every batch; EN 10204 3.1 certification available.
- Advanced Tooling: Carbide and ceramic tooling optimized for stainless steel machinability.
- ISO 9001:2015 QMS with CMM inspection and full traceability.
- Cost Advantage: Indian manufacturing labor rates give 30–50% cost savings vs US or European machining shops on equivalent parts.
- USA Export Experience: HTS code classification, country of origin documentation, and import compliance support.
- Pricing: Typical range USD 0.50–USD 50.00/piece CIF US port depending on grade and complexity.
Frequently Asked Questions – Stainless Steel Machined Parts
Q1: What is the most machinable stainless steel grade?
A: Grade 303 (EN 1.4305) is the easiest stainless steel to machine, with sulfur additions acting as chip-breakers similar to lead in brass. However, 303 cannot be welded or used in highly corrosive environments. For general machined parts where welding is not required, 303 is our first recommendation. For corrosive or food-grade applications, we use 304 or 316L.
Q2: What is the difference between 304 and 316L for machined parts?
A: Both are austenitic stainless steels with excellent corrosion resistance. 316L adds 2–3% molybdenum, which gives it significantly better resistance to chloride pitting and crevice corrosion — making it the preferred choice for marine, chemical, pharmaceutical, and food-grade applications. 304 is lower cost and adequate for most general-purpose applications not exposed to chlorides or strong acids.
Q3: What surface finish standard do you use for food-grade stainless parts?
A: For food and pharmaceutical applications we electropolish to Ra ≤0.4 µm (16 µin) and passivate per ASTM A967 / ASTM A380. We comply with 3-A Sanitary Standards and ASME BPE finishing requirements. Material certification (316L with low carbon) and full traceability to mill certs are standard for these applications.
Q4: Can you machine 17-4PH stainless steel parts?
A: Yes. We machine 17-4PH in Condition A (solution annealed) and can arrange for post-machining age hardening (H900, H1025, H1075 etc.) through our certified heat treatment sub-contractor. 17-4PH is commonly specified for high-strength shafts, valve stems, and aerospace structural parts.
Request a Quote
Contact Brass Parts India for stainless steel CNC machined parts. Email your drawings or specifications to sales@brass-parts-india.com or call +91 22 4344 9300. CIF pricing to all US seaports and air freight hubs. Fast response — 24 hours.
