SUS431 ● Chemical Composition:
Carbon C: 0.11 ~ 0.17
Si Si: ≤0.80
Manganese Mn: ≤0.80
Sulfur S: ≤0.030
Phosphorus P: ≤0.035
Chromium Cr: 16.00 ~ 18.00
Ni Ni: 1.50 ~ 2.50
● Mechanical Properties:
Tensile strength σb (MPa): quenching and tempering, ≥1080
Elongation δ5 (%): quenching and tempering, ≥10
Impact energy Akv (J): quenching and tempering, ≥39
Hardness: annealing, ≤285HB
● range SUS431 characteristics and application: as having a higher resistance to nitric acid and organic acid corrosion of parts, containers and equipment.
● Heat treatment and microstructure specifications:
Heat treatment specifications: 1) annealing, 680 ~ 700 ℃ tempering air-cooled; 2) quenching, 950 ~ 1050 ℃ oil cooling; 3) 275 ~ 350 ℃ tempering air cooling.
Microstructure: Organizing for the martensite type.
● Delivery status: to heat treatment delivery in general, the treatment types specified in the contract; not indicated, by not heat treatment delivery.
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