C55E4 - JIS G 7105-2000

Grade	C55E4
Corresponding Standard	JIS G 7105-2000 Heat-Treatable Steels, Alloy Steels and Free-Cutting Steels — Part 18 : Bright Products Of Unalloyed and Low Alloy Steels
Classification	Carbon Steel
Properties	Carburizing Ability

C55E4 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S
Minimum Value	0.52	0.1	0.6	-	-
Maximum Value	0.6	0.4	0.9	0.035	0.035

◎ Steels with machinability which has been improved either by the addition of lead or by higher sulfur levels up to about 0.100 % (m/m) S (including controlled sulfide morphology) may be available on request.

C55E4 Mechanical Properties

thickness t mm	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Hardness HBW
t≤5	TC	≥820	≥670	≥4
5＜t≤10	TC	≥800	≥620	≥5
10＜t≤16	TC	≥780	≥590	≥5
16＜t≤25	TC	≥740	≥535	≥6
25＜t≤40	TC	≥720	≥510	≥6
40＜t≤100	TC	≥640	≥330	≥7
t≤100	TC+TA, P+TA or G+TA				≥229
t≤16	TC+TN, P+TN or G+TN	≥680	≥370	≥11
16＜t≤100	TC+TN, P+TN or G+TN	≥640	≥330	≥12
100＜t≤250	TC+TN, P+TN or G+TN	≥620	≥300	≥12
t≤16	TC+TQ+TT℗, P+TQ+TT or G+TQ+TT	800~950	≥550	≥12
16＜t≤40	TC+TQ+TT℗, P+TQ+TT or G+TQ+TT	750~900	≥490	≥14
40＜t≤100	TC+TQ+TT℗, P+TQ+TT or G+TQ+TT	700~850	≥420	≥15
100＜t≤250	TC	Be agreed	Be agreed	Be agreed
100＜t≤250	TC+TA, P+TA or G+TA				Be agreed
100＜t≤250	TC+TQ+TT, P+TQ+TT or G+TQ+TT	Be agreed	Be agreed	Be agreed

C55E4 Corresponding Standards(Same grade name, different standards)

1	ISO 683-18-1996
	C55E4
2	ISO 683-1-1987
	C55E4 C55E4H C55E4HH5 C55E4HL5
3	JIS G 7105-2000
	C55E4

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