OEM Precision-machined 304 Stainless Steel Components

Machining Process

Capability Details

Typical 304 Stainless Steel Applications

CNC Milling Service

3/4-axis machining, max work envelope 800×500×400mm; standard tolerance ±0.02mm

Equipment housings, mounting brackets, manifold blocks, valve bodies, fixture plates

CNC Turning Service

2-axis & live-tool turn-mill, Ø2mm – Ø250mm diameter; standard tolerance ±0.01mm

Shafts, pins, bushings, threaded fittings, valve stems, nozzle bodies

CNC Drilling & Tapping Service

Precision hole machining, counterboring, countersinking; supports ISO, UN, NPT thread standards

Flange plates, mounting brackets, manifold ports, assembly holes

Precision Grinding Service

Surface, cylindrical & centerless grinding; tolerance down to ±0.003mm

Bearing journals, sealing surfaces, precision pins, flat mating surfaces

Welding & Sub-Assembly

TIG, MIG and spot welding for 304 stainless steel; sub-assembly and kitting services

Welded frames, enclosure assemblies, integrated component kits

Secondary Finishing

Deburring, edge radiusing, thread rolling, hardware insertion

Ready-to-assemble components, smoothed safety edges, threaded features

Treatment Type

Process Description

Key Performance Benefits

Typical OEM Applications

Citric / Nitric Acid Passivation

Chemical treatment that removes free iron particles and surface contaminants from machining, and restores the natural chromium-oxide protective layer on the 304 surface. Standard post-processing for all 304 parts.

Restores full corrosion resistance; eliminates hidden rust risk from carbon steel cross-contamination; meets ASTM A967 standards

General industrial components, fluid system parts, food equipment hardware, outdoor fixtures

Electropolishing

Electrochemical process that removes a thin surface layer of material, producing an ultra-smooth, crevice-free, reflective surface.

Surface finish down to Ra 0.1μm; improved cleanability and sanitary performance; enhanced corrosion resistance; no micro-cracks

Medical device components, food & beverage processing parts, sanitary fluid fittings, high-purity fluid systems

Mechanical Polishing

Physical abrasive polishing with graded media, available in satin, brushed and mirror finish grades.

Controlled surface roughness from Ra 0.4μm to mirror finish; improved aesthetic appearance; consistent surface texture

Decorative hardware, equipment housings, visible product components, sealing surfaces

Glass Bead Blasting

Uniform matte finish created by propelling fine glass beads at the part surface under controlled pressure.

Uniform non-reflective matte finish; hides tool marks and minor surface imperfections; slightly increases surface hardness

Equipment enclosures, structural brackets, machine guards, non-sanitary industrial components

Electroless Nickel Plating

Uniform nickel coating deposited via chemical reaction, with consistent thickness across complex geometries.

Increased surface hardness and wear resistance; improved sliding performance; additional corrosion barrier

Wear components, mating surfaces, valve stems, mechanical assemblies

Powder Coating

Dry polymer powder applied electrostatically and cured, available in a wide range of colors and gloss levels.

Decorative and protective finish; good outdoor weather resistance; abrasion resistant; thick uniform coating

Outdoor enclosures, equipment frames, cabinet housings, structural components

Black Oxide

Chemical conversion coating producing a matte black ferrous oxide surface layer.

Low-glare matte black finish; minimal dimensional change; mild corrosion protection when paired with oil seal

Optical equipment components, machine interiors, hardware where light reflection is undesirable

Treatment Type

Process Description

Key Performance Benefits

Typical OEM Applications

Stress Relieving Annealing

Low-temperature heating (typically 590–620°C) followed by controlled cooling, applied after machining, welding or cold forming.

Eliminates residual internal stress; reduces risk of dimensional drift and cracking; improves dimensional stability

Precision machined components, welded assemblies, tight-tolerance parts, long service life structural parts

Solution Annealing

High-temperature heating (1040–1060°C) followed by rapid quenching, dissolving chromium carbide precipitates back into the material matrix.

Restores full corrosion resistance; homogenizes material structure; improves ductility and formability

Welded components, cold-formed parts, corrosion-critical fluid system components

Full Soft Annealing

Controlled heating and slow cooling cycle to fully soften the material.

Maximizes material ductility and formability; reduces hardness for secondary forming operations

Parts requiring additional bending, forming or deep drawing after initial machining