Expertise in stainless steel OEM manufacturing: materials, processes, standards, and industry knowledge.
304 Stainless Steel (18% chromium, 8% nickel) is the most common grade for food-grade equipment. It offers excellent corrosion resistance for most applications, including coffee brewing, commercial kitchens, and food processing.
316 Stainless Steel adds 2-3% molybdenum, providing superior resistance to chlorides, seawater, and chemicals. It is essential for marine environments, coastal locations, and applications involving salt or aggressive cleaning agents.
| Property | 304 SS | 316 SS |
|---|---|---|
| Chromium | 18% | 16-18% |
| Nickel | 8-10.5% | 10-14% |
| Molybdenum | None | 2-3% |
| Corrosion Resistance | Excellent (general) | Superior (chlorides) |
| Cost | Lower | Higher (~20-30%) |
| Typical Applications | Coffee, kitchen, food prep | Marine, coastal, chemical |
BONRAY Recommendation: For coffee brewing equipment and commercial kitchens, 304 SS is sufficient. For coastal locations or applications involving salt (e.g., seafood processing), upgrade to 316 SS.
Read Full Comparison →Laser welding uses a focused, high-energy laser beam to join stainless steel components. It creates a narrow, deep weld seam with minimal heat-affected zone (HAZ), making it ideal for thin-walled, precision components like brewing kettles and espresso machines.
BONRAY operates 10+ laser welding stations in our Jiangmen factory. We use fiber laser welders (1000W-3000W) for stainless steel thicknesses from 0.8mm to 6mm. All welding parameters are recorded for traceability.
View Our Welding Process →Understanding the difference between OEM and ODM is critical when sourcing stainless steel products from China.
You provide: Designs, drawings, specifications, prototypes
Factory provides: Manufacturing, QC, packaging, logistics
Best for: Brands with in-house R&D, unique designs, patent protection
You provide: Minimal requirements, branding
Factory provides: Existing designs, tooling, manufacturing, QC
Best for: Fast market entry, lower MOQ, cost-sensitive projects
When exporting stainless steel equipment to the U.S. or Europe, understanding FDA and LFGB certifications is essential.
FDA regulates food contact materials under 21 CFR 175-189. For stainless steel, the key requirement is that the material must be "generally recognized as safe" (GRAS). FDA does not "certify" materials—instead, manufacturers provide a FDA Compliance Statement.
LFGB is the German food contact materials regulation (replaces LMBG). It is stricter than FDA, requiring:
BONRAY's Certification: All our food-grade products comply with FDA 21 CFR and LFGB standards. We provide compliance statements and test reports (SGS/TÜV) upon request.
Ever wondered how your stainless steel brewing kettle or espresso accessory is made? Here's the complete manufacturing process at BONRAY's Jiangmen factory.
Choose 304 or 316 stainless steel coils/sheets. Verify mill test reports (MTR) for chemical composition.
Fiber laser cutter (±0.1mm accuracy) cuts flat patterns. CNC press brake forms 3D shapes. Deburr edges.
Fiber laser welder joins components. Inert gas (argon) shielding prevents oxidation. Full-penetration welds for leak-proof performance.
Automated polishing (mirror / brushed finish). Passivation (nitric acid) removes free iron particles, enhancing corrosion resistance.
Dimensional check, leak test (air pressure), surface inspection, functionality test. ISO 9001 certified process.
Protective film, bubble wrap, export carton. Optional: custom branding, user manual, spare parts kit.