Stainless steel precision hardware - M6 screws - CNC hardware components

Stainless Steel Material Selection Guide (Abridged Version)

Core Selection Principles

Core Characteristics of the Four Main Series

Precision Material Selection by Scenario (First Choice + Core Reason)

1. General Civil Use (Kitchenware/Sanitary/Hardware) : 304 | Resists daily corrosion, good formability, high cost performance; 430 for cost-effective option
2. Food/Pharmaceutical/Drinking Water : 304/316L | Food-grade, resists food acid-alkali corrosion, no precipitation after welding; 304L for welded parts
3. Marine/High-Chloride (Seawater/Pool/Coastal) : 316L | Resists chloride pitting, main industrial grade for chloride environments; 2205 for high-load scenarios
4. High Temperature (＞600℃) : 310S (≤1200℃)/309S (≤900℃) | Resists high-temperature oxidation, no softening; 430 (≤600℃) for cost-effective option
5. Low Temperature (＜-20℃) : 316L/304L | Resists low-temperature brittle fracture, retains plasticity; low-carbon grades mandatory for ultra-low temperature (≥-196℃)
6. Machining/Wear-Resistant (Cutting Tools/Molds/Shafts) : 440C | High quenchable hardness; 410/420 for basic wear resistance
7. High Strength + Corrosion Resistance (High-Pressure Pipes/Heavy-Duty Equipment) : 2205 | Twice the strength of 304, corrosion/ deformation resistance; 2507 for severe corrosion
8. Decorative Scenarios : 304/430 for indoor | Easy to polish, good appearance; 316 for outdoor/coastal | Resists high-chloride atmospheric corrosion, non-discoloring
9. General Industry (Weak Acid/Alkali/Chemical) : 304L/304 | Good corrosion resistance & weldability, industrial general grade; 316 for trace chloride environments

Key Points to Avoid Selection Mistakes

1. Prioritize low-carbon grades with L for welded parts to prevent intergranular corrosion;
2. Magnetism is not a criterion for authenticity: Austenitic steel is slightly magnetic after cold working, ferritic/martensitic steel is strongly magnetic;
3. Smoother surface = better corrosion resistance: Polished/Brushed ＞ Pickled ＞ Hot-rolled; smooth surface preferred for high-chloride scenarios;
4. Cost control: Use 304 instead of 316, 430 instead of 304 for non-extreme scenarios; select grades on demand, no blind over-specification;
5. Food/pharmaceutical industry grades must comply with food contact standards such as GB 4806.9/FDA.

We have introduced advanced equipment and technology from Japan and Germany (CNC 5-axis and 6-axis machines) to better serve our customers' needs.

Our maximum processing outer diameter is 60, and the minimum control tolerance is 0.001. We have Japanese CNC Tsugami, CNC Citizen, multi-station cold extrusion forming machines, 500T press machines, casting equipment, and various process equipment, which can effectively provide customers with the best technical solutions.

Our company has a total of 300 employees, including 20 technicians, 10 engineers, and 15 quality control personnel. We have over 300 pieces of equipment.

Our company implements 8S management and has passed ISO9001 and TS16949 automotive certifications.

Our customers include Siemens, bo-sch, Foxconn, Panasonic Motors, Husqvarna, Shimano, NVIDIA, DJI Drones, Siegenia, and Cater-pillar.