GRADES

Grade 
(AISI)

C

Mn

Si

P

S

Cr

Mo

Ni

N

420

min.

max.

0.15

0.25

-

1.5

-

1.0

-

0.040

-

0.030

12.0

14.0

-

-

-

Grade 
(AISI)

Tensile Strength
(MPa) min

Yield Strength 
0.2% Proof
(MPa) min

Elongation
(% in 50mm)
min

Hardness

Impact Charpy
V (j)

Brinell
(HB) max

420

Annealed

655

345

25

-

241

Grade
(AISI)

Density
(kg/m3)

Modulus of 
Elasticity
(GPa)

Coeff. of 
Thermal Exp.
(mm/m/°C)

Specific Thermal 
Capacity
(W/m.K)

Specific Heat
0-100°C
(J/kg.K)

Electrical
Resistivity
(nW.m)

0-100
°C

0-315
°C

0-538
°C

At
100°C

At
500°C

420

7750

200

10.3

10.8

11.7

24.9

-

460

550