420S45

420S45 Stainless Steels to BS 1449-2

420S45 - Specification & Application

  • BS 1449-2 - Steel plate, sheet and strip. Specification for stainless and heat-resisting steel plate, sheet and strip
  • BS 1554 - Specification for stainless and heat-resisting steel round wire
  • BS 2056 - Specification for stainless steel wire for mechanical springs
  • BS 5770-4 - Steel strip intended for the manufacture of springs. Specification for martensitic and austenitic stainless steel

Steel strip intended for the manufacture of springs. Specification for martensitic and austenitic stainless steel

Chemical composition(wt.%) of 420S45 grade: to BS 1449-2

Elements Min.（≥） Max.（≤） Similar Remarks
C 0.28 0.36
Si - 1.00
Mn - 1.00
P - 0.04
S - 0.03
Cr 12.00 14.00
Mo - -
Ni - 1.00

420S45 - Detail

Steel strip intended for the manufacture of springs. Specification for martensitic and austenitic stainless steel

Mechanical properties of grade 420S45 BS 1449-2

Proof strength
Rp0.2 (MPa)		 Tensile strength
Rm (MPa)		 Impact energy
KV (J)		 Elongation at fracture
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition Brinell hardness (HBW)
985 (≥) 451 (≥) 23 22 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 433

Physical properties of grade 420S45 BS 1449-2

Property Density
kg/dm3		 Temperature T
°C/F		 Specific heat
J / kgK		 Thermal conductivity
W/mK		 Electric resistance
µΩ·cm		 Modulus of elasticity
kN/mm2		 Expansion rate
416 (≥) 427 (≥) 44 44 11 Solution and Aging, Annealing, Ausaging, Q+T,etc 211
Temp.
°C/°F		 Creep strain limit
(10000h)
(Rp1,0) N/mm2		 Creep rupture strength
(10000h)
(Rp1,0) N/mm2
846 854 492

Equivalent Grade

1 420S45 2 420S45 3 X45Cr13 4 1.3541

Equivalent Products

Product shapes we supply:

We can customize the production of 420S45 grade, contact us for the best solution.
–sales@specificsteel.com