420 Stainless Steel Bar

420 Stainless Steel Bar

The carbon content of 420 lines of steel is lower than 0.35, and the hardness after heat treatment has to be hrc52-55, and the performance of the damage resistance is not very outstanding. Because it is easier to cut and polish, it is suitable for use in a large number of pbaruction plant...
Product description

The carbon content of 420 lines of steel is lower than 0.35, and the hardness after heat treatment has to be hrc52-55, and the performance of the damage resistance is not very outstanding. Because it is easier to cut and polish, it is suitable for use in a large number of pbaruction plant knives, 420 steel also because of low carbon content and rust resistance is excellent, it is also the pbaruction of the ideal steel tool. 420J2/420J1/420F Stainless Steel has a certain wear resistance and corrosion resistance, high hardness, the price of stainless steel ball in a lower class, applicable to the general requirements of stainless steel working environment. Applicable to various types of precision machinery, bearings, electrical, equipment, instrumentation, instrumentation, transportation tools, household appliances. It is used for the manufacture of parts that are resistant to atmospheric, water vapor and oxidizing acid. 420J1 Stainless Steel: High hardness after quenching, good corrosion resistance (magnetic) 420J2 stainless steel quenching, than 420j1 steel hardness increase (magnetic).

420j2 also called 3cr13 steel is martensitic stainless steel, used after quenching and tempering. Compared with 1cr13 and 2cr13 steel, it has higher strength, hardness and hardenability, but its corrosion resistance and thermal stability under 700 ℃ are lower than that of 1cr13 and 2cr13 steel. Cold processing performance and welding performance is not good, after welding should be immediately heat treatment, in order to prevent cracking. It has better machinability in the condition of annealing.

Corresponding National brands

Corresponding Japanese brand: sus420j2

Corresponding US brand: 420S45

Corresponding French brand: Z30c13


Chemical Composition

Element

C

Mn

Si

Cr

Ni

S

P

Content%

0.26-0.35

≤1

≤1

12.00-14.00

≤0.60

≤0.030

≤0.035


Mechanical Properties

Tensile Strength σb (MPa): Quenching and Tempering, ≥735

Conditions Yield Strength σ0.2 (MPa): Quenching and Tempering, ≥540

Elongation Rate δ5 (%): Quenching and Tempering, ≥12

Shrinkage Rate of Section ψ (%): Quenching and Tempering, ≥40

Impact Power Akv (J): Quenching and Tempering, ≥24

Hardness: Annealing, ≤235HB;Quenching and Tempering, ≥217HB

Density: 7.75g/cm3


Heat

Bars and forgings: 1000~1050℃ oil quenching or air cooling, 200~300℃ tempering. PLATE: 740~780℃ annealing or High-temperature tempering.

Smelting and casting process: can be electric arc furnace, arc furnace + Electroslag remelting and other methods of smelting.


Hardness under Heat Treatment

Heat Treatment System

HRC

HRB

HB Kgf/mm2

870-900℃

--

81

155-180

760℃ Intermediate   annealing, Air cooling

--

80-92

205-225

980-1050℃   Oil cold

53-56

--

530-560

980-1050℃   Oil quenching +150 - 370℃

Tempering

48-53

--

470-530

 


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