SUS431 Stainless Steel C3-80 Army Green Zinc Hex Nuts

C3-80 refers to martensitic stainless steel 1Cr17Ni2 material or 14Cr17Ni2 material, pulling force of 800 N / mm2.C3-80 refers to the performance level.
C3-80 martensitic stainless steel is the strength and toughness with a better type of steel. It has good corrosion resistance to oxidizing acids, most organic acids, and aqueous solutions of organic salts. Generally suitable for the manufacture of nitric acid, acetic acid production and light industry, textile and other industries both require toughness and corrosion-resistant shaft, piston rod, pump and other parts.
C3-80 steel is a low-carbon chromium-nickel-type corrosion-resistant steel, with high strength and hardness. Oxidizing acids (a certain temperature, concentration of nitric acid, most of the organic acids), and organic acid aqueous solution has good corrosion resistance. Sub-temperature quenching can effectively inhibit the high temperature temper brittleness of the steel. Can reduce the brittle transition temperature of steel, the toughness is improved, the fracture morphology changes from quasi-cleavage to dimple, and the enrichment of alloying elements into the matrix and δ-ferrite increases. In improving the toughness of the steel While still maintaining a high level of intensity. However, the steel welding performance is not good, easy to produce cracks, so the time of manufacture, should not be welded.
When forging heating temperature is high, although the steel α-phase increased, but good plasticity, which is part of the strong recrystallization organizations. The steel has the highest elongation at 1100 ° C. In order to improve the ductility and surface quality of steel, stop-forging and stop-rolling temperature should be higher; at the same time, in order to get uniform structure, larger forging ratio should be adopted.
C3-80 Similar brand:
USA:UNS S43100
Germany: X22CrNi17,W.Nr1.4507
China:14Cr17Ni2
UK:BS 431S29
Japen:SUS431
C3-80 is a martensitic stainless steel. Its corrosion resistance than austenitic stainless steel. Therefore, the general surface need to be coated with anti-rust oil to prevent rust. Martensitic stainless steel processing difficulties lies in its heat treatment process. To control the heat treatment process is the key to production.
The following is the heat treatment specifications:
1) annealing .680 ~ 700 ºC high temperature tempering air cooling;
2) quenching .950 ~ 1050 ºC oil cooling;
3) tempering .275 ~ 350 ºC air cooling.
C3-80 technical specifications
Thermal processing specifications
Cold Furnace Furnace temperature ≤800 ° C (hot Furnace temperature is not limited), the starting temperature of 1100 ~ 1150 ° C, the termination temperature> 850 ° C,> 50 ° C in the sand slow cooling.
Low temperature annealing specification
Annealing temperature 670 ° C, furnace cooling, microstructure of pearlite.
High temperature annealing specification
Annealing temperature 850 ~ 870 ° C, oil or air cooling, hardness ≤ 250HBW.
Quenching and tempering specifications
1) quenching temperature 950 ° C ~ 1050 ° C, oil cooling, tempering temperature 275 ~ 350 ° C, air cooling, tensile strength ≥ 1100MPa, elongation ≥ 10%, impact toughness ≥ 50J / cm2, hardness ≤ 285HBW
2) quenching temperature 950 ~ 1050 ° C, oil quenching and tempering temperature 280 ~ 350 ° C, air cooling, tensile strength 1100 ~ 1730MPa, elongation 10% ~ 22%, impact toughness 25 ~ 50J / cm2, hardness 187 ~ 286HBW
C3-80 mechanical properties:
tensile strength:≥800 Mpa
Yield Strength:≥640 Mpa
Elongation:≥15%
Density: 7.75g / cm3
C3-80 Metallography: The characteristics of the organization for the martensite type.
C3-80/S43100/1.4507 Allpication Aresa:
Petrochemical industry, fluid valve, boiler pipe, pressure vessel, steam turbine, car engine, marine engine, fuel engine, thermal power plant, nuclear power engineering equipment, Equipment, metallurgy refining machinery and equipment

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