C55R - DIN EN ISO 683-1-2018

Grade	C55R
Corresponding Standard	DIN EN ISO 683-1-2018 Heat-treatable steels,alloy steels and free-cutting steels--Part 1: Non-alloy steels for quenching and tempering
Classification	Carbon Steel

C55R Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S	Cr	Ni	Cu	Mo	More
Minimum Value	0.52	0.1	0.6	-	0.02	-	-	-	-	Cr+Mo+Ni≤0.63
Maximum Value	0.6	0.4	0.9	0.025	0.04	0.4	0.4	0.3	0.1	Cr+Mo+Ni≤0.63

C55R Mechanical Properties

	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Reduction of Area ψ %	Hardness HBW
d≤16; t≤8	Quenching and Tempering	800~950	≥550	≥12	≥30
16＜d≤40；8＜t≤20	Quenching and Tempering	750~900	≥490	≥14	≥35
40＜d≤100；20＜t≤60	Quenching and Tempering	700~850	≥420	≥15	≥40
d≤16；t≤16	Normalizing (N)	≥680	≥370	≥11
16<d≤100；16＜t≤100	Normalizing (N)	≥640	≥330	≥12
100<d≤250；100＜t≤250	Normalizing (N)	≥620	≥300	≥12
All Sizes	Shearable Condition (+S)					≤255
All Sizes	Softening Annealing (+A)					≤229
d≤100；t≤100	Flame or Induction Quenching					HRC ≥58

New and Old Grade Replacement List

C55R Corresponding Standards(Same grade name, different standards)

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!