C30 - JIS G 7105-2000

Grade	C30
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

C30 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S
Minimum Value	0.27	0.1	0.5	-	-
Maximum Value	0.34	0.4	0.8	0.045	0.045

◎ 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.

C30 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	≥650	≥520	≥5
5＜t≤10	TC	≥610	≥475	≥6
10＜t≤16	TC	≥570	≥430	≥7
16＜t≤25	TC	≥550	≥395	≥8
25＜t≤40	TC	≥520	≥370	≥9
40＜t≤100	TC	≥480	≥250	≥9
t≤100	TC+TA, P+TA or G+TA				≥170
t≤16	TC+TN, P+TN or G+TN	≥510	≥260	≥20
16＜t≤100	TC+TN, P+TN or G+TN	≥480	≥250	≥21
100＜t≤250	TC+TN, P+TN or G+TN	≥460	≥230	≥21
t≤16	TC+TQ+TT℗, P+TQ+TT or G+TQ+TT	600~750	≥400	≥18
16＜t≤40	TC+TQ+TT℗, P+TQ+TT or G+TQ+TT	550~700	≥350	≥20
40＜t≤100	TC+TQ+TT, P+TQ+TT or G+TQ+TT	500~650®	≥300®	≥21®
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

C30 Corresponding Standards(Same grade name, different standards)

1	ISO 683-18-1996
	C30
2	DIN 17200-1987
	C30 1.0528
3	ISO 683-1-1987
	C30
4	JIS G 7401-2000
	(C30) 25CrMo4E
5	ISO 4954-1993
	(C30) 25CrMo4E
6	EN 10250-2-2000
	C30 1.0528
7	ISO 683-1-2016
	C30
8	DIN EN ISO 683-1-2018
	C30
9	ISO 683-18-2014
	C30
10	JIS G 7105-2000
	C30

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