●High strength and toughness: tensile strength 500-1500MPa (austenitic stainless steel elongation up to 40%).
●Severe work hardening: hardness increases by 20-30% during cutting, need to use sharp tools.
●Low thermal conductivity: only 1/3 that of carbon steel (about 16W/m・K), easy to generate high cutting temperature.
●Fast tool wear: it is recommended to use TiAlN coated tungsten carbide tools (tool life is half that of steel processing).
●Obvious tool sticking phenomenon: need sufficient cooling (water-based cutting fluid is recommended).
●High surface quality requirements: easy to produce vibration marks, finishing needs to reduce cutting depth to below 0.1mm.
All uploads are secure and confidential.Grade | Tensile strength (MPa) | Yield strength (MPa) | Hardness (HRC/HB) | Magnetic | Main characteristics | Application scenarios |
201 | 520 | 275 | HB≤217 | Weakly magnetic | Low cost, easy to machine | Decorative tubes, structural components (non-corrosive environment) |
303 | 515 | 205 | HB≤187 | No | Easy to machine (sulfur added) | Automatic lathe parts, standard parts |
304 | 515 | 205 | HB≤201 | No | Excellent comprehensive corrosion resistance | Food machinery, medical equipment, chemical equipment |
316L | 485 | 170 | HB≤201 | No | Chloride corrosion resistance | Marine equipment, pharmaceutical pipelines |
420 | 620 | 415 | HRC48-52 | Yes | High strength martensitic stainless steel | Cutting tools, bearings, pump shafts |
430 | 450 | 290 | HB≤183 | Yes | Ferritic stainless steel, stress corrosion resistance | Kitchenware, home appliance panels |
2205 | 620 | 450 | HB≤290 | Yes | Duplex stainless steel, high strength and corrosion resistance | Petrochemical equipment, offshore platforms |
904L | 520 | 220 | HB≤190 | No | Super austenitic stainless steel, acid resistance | Sulfuric acid environment equipment, high-end chemical containers |
✔ Machining parameter differences: 304 stainless steel cutting speed recommended ≤100m/min (303 can reach 150m/min).
✔ 2205 processing feed rate needs to be reduced by 20% to prevent tool chipping.
✔ Welding attention: 316L is recommended to use ER316L welding wire, interlayer temperature ≤150℃.
✔ 420 needs preheating at 300℃ before welding, and tempering after welding. ✔ Surface treatment compatibility: 304 is suitable for electro polishing + passivation treatment (Cr content ≥12%).
✔ 430 can be blackened to enhance rust prevention.
✔ Corrosion resistance: 904L > 316L > 304
✔ Machining efficiency: 303 > 201 > 304
✔ Comprehensive cost: 201 (lowest) < 304 < 430 < 316L < 2205 < 904L