Martensitic Stainless Steel bar 420/1.4021/X20Cr13/S42000 – GMTC

420

  • 1.4021, S42000, SUS 420J1

SpecificationDIN EN 10088, ASTM A276/A276M, ASTM F899, JIS G4303

It is a Martensite hardening stainless steel that has higher strength and hardness that that of 410 and better wear resistance. After being hardened, it has superior properties. It also has good ductility when annealing.

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Introduction

Product properties

˙Good ductility in the annealing state

˙Good corrosion resistance when metal is polished, surface grinded, or hardened

Industrial Applications

˙Shear blade

˙Needle valve

˙Surgical devices

˙Tableware

Specifications

Chemical composition (wt. %)

Element
C
Si
Mn
P
S
Cr
Ni
Mo
Cu
Al
Min.
0.30
-
-
-
-
12.20
-
-
-
-
Max.
0.35
1.00
1.00
0.040
0.030
12.60
0.50
0.50
0.50
0.05

Physical Property

Density (g/cm^3)
7.8

Modulus of elasticity

Temperature (℃)
Gpa
20
210
500
174

Thermal Expansion Coefficient

Temperature (℃)
10^-6/℃
0~315
10.8
0~538
11.7

Thermal Conductivity

Temperature (℃)
W/m·K
100
24.9

Mechanical Property

Items
Annealed
Hardness
223 (HBW) max.
Hardness After Quenching (hardenability)
50 (HRC) min.

Size Ranges

Products
Diameter (mm)
Length (mm)
Rolled bar
10~95
3,000~5,700
Forged bar
95.2~680
3,000~5,700
Billet
130x130, 140x140, 150x150, 160x160
7,000 max
Flat bar
80x80 (min.)
Based on the customer needs

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