Cold rolled special steel strips, cold rolled steel products

HOME > Product Information > Cold rolled steel products > Cold rolled special steel strips

Cold rolled steel products

Cold rolled special steel strips

Types Finish Hardness Structure Dimensional tolerances Available manufacturing range

We provide a versatile range of steel grades based on JIS G 3311 Cold rolled special steel strip, including carbon steel, carbon tool steel, chrome steel, and chrome molybdenum steel.
We also provide steel grades other than those specified in JIS G 3311.

Types

Classification	Steel grade	Chemical composition, %
Classification	Steel grade	C	Si	Mn	P	S	Cu	Ni	Cr	Ni+Cr	Mo
Carbon steel	S20C	0.18 - 0.23	0.15 - 0.35	0.30 - 0.60	≤0.030	≤0.035	-	-	-	-	-
	S35CM	0.32 - 0.38	0.15 - 0.35	0.60 - 0.90	≤0.030	≤0.035	≤0.30	≤0.20	≤0.20	≤0.35	-
	S40C	0.37 - 0.43	0.15 - 0.35	0.60 - 0.90	≤0.030	≤0.035	≤0.30	≤0.20	≤0.20	≤0.35	-
	S45CM	0.42 - 0.48	0.15 - 0.35	0.60 - 0.90	≤0.030	≤0.035	≤0.30	≤0.20	≤0.20	≤0.35	-
	S50CM	0.47 - 0.53	0.15 - 0.35	0.60 - 0.90	≤0.030	≤0.035	≤0.30	≤0.20	≤0.20	≤0.35	-
	S55CM	0.52 - 0.58	0.15 - 0.35	0.60 - 0.90	≤0.030	≤0.035	≤0.30	≤0.20	≤0.20	≤0.35	-
	S60CM	0.55 - 0.65	0.15 - 0.35	0.60 - 0.90	≤0.030	≤0.035	≤0.30	≤0.20	≤0.20	-	-
	S65CM	0.60 - 0.70	0.15 - 0.35	0.60 - 0.90	≤0.030	≤0.035	≤0.30	≤0.20	≤0.20	-	-
Carbon tool steel	SK85M (Old SK5M)	0.80 - 0.90	0.10 - 0.35	0.10 - 0.50	≤0.030	≤0.030	≤0.25	≤0.25	≤0.30	-	-
Chrome steel	SCr420M	0.18 - 0.23	0.15 - 0.35	0.60 - 0.90	≤0.030	≤0.030	≤0.30	≤0.25	0.90-1.20	-	-
Chrome molybdenum steel	SCM415M	0.13 - 0.18	0.15 - 0.35	0.60 - 0.90	≤0.030	≤0.030	≤0.30	≤0.25	0.90-1.20	-	0.15-0.25
	SCM420	0.18 - 0.23	0.15 - 0.35	0.60 - 0.90	≤0.030	≤0.030	≤0.30	≤0.25	0.90-1.20	-	0.15-0.25
	SCM435M	0.33 - 0.38	0.15 - 0.35	0.60 - 0.90	≤0.030	≤0.030	≤0.30	≤0.25	0.90-1.20	-	0.15-0.30

[ SAE standard ]

Steel grade	Chemical composition, %
Steel grade	C	Mn	P	S
SAE1035	0.32 - 0.38	0.60 - 0.90	≤0.030	≤0.050
SAE1042	0.40 - 0.47	0.60 - 0.90	≤0.030	≤0.050
SAE1050	0.48 - 0.55	0.60 - 0.90	≤0.030	≤0.050
SAE1055	0.50 - 0.60	0.60 - 0.90	≤0.030	≤0.050
SAE1060	0.55 - 0.65	0.60 - 0.90	≤0.030	≤0.050
SAE1065	0.60 - 0.70	0.60 - 0.90	≤0.030	≤0.050

Finish

Type	Symbol	Remarks	Notes
Annealed	A	Annealed after cold rolling	We use bright finish for our materials.
Skin-passed	S	Cold rolled steel annealed and then tempered (skin-passed)
As cold rolled	R	Cold rolled steel as is

Hardness

	Type			Annealed A		Takasago special standard, Annealed A		As cold rolled R (for reference)
	JIS G 3311	SAE equivalent	Takasago	HV	HRBS	HV	HRBS	HV	HRBS	(HRC)
Carbon steel	-	1020	S20C	≤150	≤78	≤140	≤75	190 - 230	90 - 97	(9 - 18)
	S35CM	1035	S35C	≤170	≤85	≤150	≤78	200 - 240	91 - 98	(11 - 20)
	-	1042	-	≤170	≤85	≤160	≤82	200 - 240	91 - 98	(11 - 20)
	S45CM	1045	S45C	≤170	≤85	≤160	≤82	210 - 250	93 - 100	(13 - 22)
	S50CM	1050	S50C	≤180	≤88	≤160	≤82	230 - 270	97 - (102)	(18 - 26)
	S55CM	1055	S55C	≤180	≤88	≤165	≤84	230 - 270	97 - (102)	(18 - 26)
	S60CM	1060	S60C	≤190	≤90	≤170	≤85	230 - 270	97 - (102)	(18 - 26)
	S65CM	1065	S65C	≤190	≤90	≤170	≤85	230 - 270	97 - (102)	(18 - 26)
Carbon tool steel	SK85M (SK5M)	-	SK85 SK5	≤200	≤92	≤180	≤88	240 - 280	98 - 104	(20 - 27)
Chrome steel	SCr420M	-	SCr420	≤180	≤88	≤150	≤78	200 - 240	91 - 98	(11 - 20)
Chrome molybdenum steel	SCM415M	-	SCM415	≤170	≤85	≤150	≤78	200 - 240	91 - 98	(11 - 20)
	-	-	SCM420	≤180	≤88	≤160	≤82	200 - 240	91 - 98	(11 - 20)
	SCM435M	-	SCM435	≤190	≤90	≤170	≤85	230 - 270	97 - (102)	(18 - 26)

*The dimensions of the products ordered may affect the availability of products manufactured to specific hardness standards.

Structure

SCM415M spheroidizing annealing structure (x 400)

SK85M spheroidizing annealing structure (x 400)

Dimensional tolerances

(1) Thickness tolerances

Unit: mm
		Thickness tolerances B		Thickness tolerances A		Takasago special standard
		Width < 200	Width ≥ 200	Width < 200	Width ≥ 200	S standard	SS standard	U standard
0.50≤	<0.60	±0.035	±0.040	±0.025	±0.030	±0.020	±0.015	±0.011
0.60≤	<0.90	±0.045	±0.050	±0.030	±0.040	±0.025	±0.020	±0.013
0.90≤	<1.20	±0.055	±0.060	±0.040	±0.050	±0.030	±0.025	±0.016
1.20≤	<1.60	±0.060	±0.070	±0.050	±0.060	±0.035	±0.030	±0.020
1.60≤	<2.10	±0.075	±0.080	±0.055	±0.070	±0.040	±0.035	±0.025
2.10≤	<3.00	±0.080	±0.090	±0.065	±0.080	±0.050	±0.040	-
3.00≤	<4.00	±0.090	±0.100	±0.080	±0.090	±0.060	±0.050	-
4.00≤	<5.00	-	-	±0.10	±0.11	±0.07	±0.06	-
5.00≤	<6.00	-	-	±0.12	±0.13	±0.09	±0.07	-
6.00≤	<7.00	-	-	±0.15	±0.17	±0.11	±0.09	-

Notes
1. The thickness of a steel strip is typically measured at a point within 10 mm of the edges. For pieces less than 30 mm in width, thickness is measured at the center.
2. To order sizes not listed above, please feel free to contact us.
3. Costs are higher for products made to meet special standards (SS and U).

(2) Width tolerances

Unit: mm
Thickness		Width < 200	Width ≥ 200	Notes
0.50≤	<0.60	±0.15	±0.25	JIS G 3311
0.60≤	<1.20	±0.20	±0.30
1.20≤	<4.00	±0.25	±0.40
4.00≤	<5.00	±0.30	±0.50	Takasago special standard
5.00≤	<6.00	±0.50	±0.65
6.00≤	<7.00	±0.60	±0.75

(3) Length tolerances

Unit: mm
Thickness classification		JIS G 3311 0.5 - 4.0		Takasago special standard 4.0 to 8.0
Width classification		Width < 200	Width ≥ 200	Width < 450
Length classification	800≤ - <2000	+5	+10	+10
	800≤ - <2000	0	0	0
	2000≤ - <2800	+10	+20	+20
	2000≤ - <2800	0	0	0

(4) Camber tolerances

Unit: mm
Width	Camber tolerance (mm/2 m)	Notes
12≤ <21	32	Takasago special standard
21≤ <31	25
31≤ <80	12
80≤	4	JIS G 3311

*Excluding SUY, SUYP

Available manufacturing range

Carbon steel, chrome steel, chrome molybdenum steel	Carbon tool steel (SK85M, SK5M)
	Coils Cut sheets The available manufacturing range will differ according to the steel grade, finish, size, dimensional tolerances, and mechanical properties. Contact us as for individual specifications.