431 SS Round Bar

431 SS Round Bar

431 Characteristics and application: 431 (16CR-2NI) CR steel containing NI can obtain high mechanical properties through heat treatment and corrosion resistance is superior to 410 steel and 430 steel. 431 stainless steel corresponds to China 1cr17ni2, Japan JIS SUS431. 431 Chemical constituents...
Product description

431 Characteristics and Application

431 (16CR-2NI) CR steel containing NI can obtain high mechanical properties through heat treatment and corrosion resistance is superior to 410 steel and 430 steel. 431 stainless steel corresponds to China 1cr17ni2, Japan JIS SUS431.


431 Chemical Constituents 

C ≤ 0.20

Mn ≤ 1.00

Si ≤ 1.00

Cr: 15.0~17.0

Ni: 1.25~2.50

P ≤ 0.04

S ≤ 0.03


Surface: grinding rods, bright rods, black skin.


Application: Used as a high resistance to nitric acid and organic acid corrosion of the parts, containers and equipment.


Mechanical Properties

Tensile Strength σb (MPa): Quenching and Tempering, ≥1080

Elongation Rate δ5 (%): quenching and Tempering, ≥10

Impact Power AKV (J): Quenching and Tempering, ≥39

Hardness: annealing, ≤285HB


Heat Treatment Specification and Metallographic Organization

Specification for heat treatment

1) annealing, 680~700℃ high-temperature tempering air cooling;

2) quenching, 950~1050℃ oil cold;

3) Tempering 275~350℃ air cold.


Metallographic Structure: The organization characteristic is the martensite body shape.

Delivery Status: Generally in the state of heat treatment delivery, the type of heat treatment in the contract is noted;

 


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