C20 - JIS G 7105-2000

Grade	C20
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

C20 Chemical Element Composition Content (%)

Component	C	Si	Mn	P	S
Minimum Value	0.17	0.1	0.3	-	-
Maximum Value	0.23	0.4	0.6	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.

C20 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	≥580	≥460	≥5
5＜t≤10	TC	≥540	≥415	≥5
10＜t≤16	TC	≥490	≥370	≥7
16＜t≤25	TC	≥470	≥340	≥8
25＜t≤40	TC	≥450	≥320	≥9
40＜t≤100	TC	≥400	≥210	≥11
t≤100	TC+TA, P+TA or G+TA				≥156
t≤100	TC+TN, P+TN or G+TN	≥400	≥210	≥27
100＜t≤250	TC or TC+TN, P+TN or G+TN	Be agreed	Be agreed	Be agreed
t≤250	TC+TQ+TT, P+TQ+TT or G+TQ+TT	Be agreed	Be agreed	Be agreed
100＜t≤250	TC+TA, P+TA or G+TA				Be agreed

C20 Corresponding Standards(Same grade name, different standards)

1	ISO 683-18-1996
	C20
2	JIS G 7105-2000
	C20

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