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S55C steel

JISG4051 S55C steel Description
JISG4051 S55C steel is a medium carbon steel is used when greater strength and hardness is desired than in the "as rolled" condition. Extreme size accuracy, straightness and concentricity combine to minimize wear in high speed applications. Turned, ground and polished.

JISG4051 S55C steel Applications
Quenched and subsequently tempered steel for less exacting springs, shafts, bushings, crankshafts, etc.

The equivalent standards of S55C steel 

  S55C
JIS G 4051
Number:1.0535

Comparision of steel grades

EN 10083-2 C 55
DIN 17200 C 55
NFA 33-101 AF70-C 55
UNI 7846 C 55
BS 970 070 M 55
UNE 36011 C 55 k
SAE J 403-AISI 1055

Chemical Composition of S55C steel

Grade C(%)min-max Si(%)min-max Mn(%)min-max P(%)max S(%)max Cr(%)min-max
S55C 0.52-0.60 0.15-0.35 0.60-0.90 0.025 0.025 0.20-0.40

Mechanical Propertities of S55C steel

Grade Condition Yield Strength

(Mpa)
Tensile Strength
Rm
(Mpa)
Elon-
gation
A5
(%)
Hardness
HRC
Quenching
Temperature
(℃)
Benda-
bility
Nominal Thickness,t
1.95mm≤t≤10.0mm
Rolled Annealed
  S55C Rolled
Annealed
Water-quenched
Oil quenched
500
350
825
550
2510
2120
18
30
61
57
805
845
Min.reco-mmended
Bending radius
(≤90°)
3.0
×t
1.0×t