Application scope of stainless steel
Typical application scenarios of 1.2083/4Cr13/S136/420SS stainless steel (high chromium martensitic die steel), considering its core characteristics such as high corrosion resistance (Cr ≥ 15%), excellent polishing performance (up to Ra0.01 μ m), and wear resistance (50-52 HRC after quenching):
Strong corrosive plastic molding
PVC/Fluorinated Plastic Injection Mold
Manufacturing chemical valves and seals, with acid resistant media and corrosion resistance more than three times better than ordinary mold steel, and mold life increased by more than 40%.
Disposable tableware mold
Resistant to food grade disinfectants (such as sodium hypochlorite) and compliant with FDA biocompatibility standards.
High precision optical components
Optical lenses and light guide plate molds
Mirror polishing to Ra0.01 μ m, used for mass production of camera lenses and AR lens transparent parts, ensuring micrometer level surface accuracy.
Laser disc and electronic display panel
High smoothness etching mold, suitable for microstructure texture transfer printing.
Medical and Food Packaging
Medical container injection mold
Compatible with high temperature and high pressure sterilization (121-134 ℃), resistant to biological liquid corrosion, suitable for the production of syringes and infusion sets.
Acid resistant beverage bottle cap mold
Surface chrome plating or PVD coating reinforcement to cope with acidic environments of carbonated beverages.
Industrial wear-resistant and transmission components
Chemical pump valve liner
After nitriding treatment, the surface hardness is 1000-1200 HV, which is resistant to wear from fluids containing particles.
High load transmission shaft system
Replace conventional alloy steel and extend the service life of mechanical components in corrosive environments.
Key processes and limitations
Heat treatment specifications:
Quenching: 980-1050 ℃ oil/air cooling (52-56 HRC)
Tempering: 200-400 ℃ x 2 times (recommended 48-52 HRC working hardness).
Applicable boundary: Avoid working conditions above 400 ℃; The material's tolerance to strong oxidizing acid environments needs to be evaluated.
A typical application case of 9Cr18Mo/440C steel (high carbon and high chromium martensitic stainless steel), based on its core characteristics such as ultra-high hardness (58-62 HRC), wear resistance, and moderate corrosion resistance:
Precision cutting tools and cutting tools
Medical surgical instruments
After vacuum heat treatment, the hardness of the surgical blade reaches 60 HRC, and the blade thickness is ≤ 0.1mm, meeting the requirements of corrosion resistance in a sterile environment;
After nitriding treatment, the surface hardness of dental drill bits is greater than 1200 HV, and the service life is three times longer than that of ordinary tool steel.
Industrial cutting tools
Food processing knives (such as meat cutting machine blades), resistant to acidic media corrosion, continuous working temperature ≤ 250 ℃;
High precision bearing rolling cutters with a machining tolerance of ± 0.005mm, suitable for high-speed cutting scenarios.
Wear resistant mechanical components
High load bearing
The service life of ship transmission shaft bearings in seawater environment reaches 15 years (traditional materials have a service life of 5-8 years);
Aircraft engine fuel pump bearings are resistant to aviation kerosene corrosion and friction at 30000 revolutions per minute.
Valves and Fluid Control
Sealing ring for chemical pumps, with a hardness of 58 HRC, resistant to wear from media containing particles;
Ultra low temperature valve components (-196 ℃ LNG working condition) to maintain dimensional stability.
Special molds and industrial parts
Corrosion resistant precision mold
Semiconductor IC packaging mold, mirror polished to Ra0.05 μ m, suitable for epoxy resin corrosion environment;
Food grade plastic molds (such as PET bottle cap molds) have a chrome plated surface that is resistant to carbon dioxide corrosion.
Military and special equipment
The hardness of the tactical cutting tool blade is 60 HRC, and there are no rust spots after 72 hours of salt spray resistance testing;
The locking mechanism components of firearms are capable of withstanding high-frequency impact loads.
Key processes and limitations
Heat treatment core:
Quenching: 1010-1060 ℃ oil cooling (to avoid decarburization)
Tempering: 150-300 ℃ x 2 times (avoiding the 475 ℃ brittle zone);
Performance boundary:
Corrosion resistance: suitable for weakly corrosive environments, requiring surface treatment (such as PVD coating) in strong acid/seawater scenarios;
Resilience limitation: The impact toughness is only 5-10 J/cm ², avoiding heavy impact loads.