Cold rolled steel sheets and strips SPCC SPCD SPCE chemical composition chart - Knowledge

What is cold-rolled steel coil?

Cold-rolled coils are products made by rolling hot-rolled coils at room temperature. The manufacturing process of cold-rolled coils includes pickling the hot-rolled coils to remove the oxide scale, followed by cold continuous rolling to finally obtain hard-rolled coils.

Cold-rolled coils have a wide range of applications, including automobile manufacturing, electrical products, locomotives and rolling stock, aviation, precision instruments, canned food, and construction.

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Specifications

Cold rolled steel sheets and strips (JIS G 3141)

Steel type symbol		Skin-pass symbol	Steel grade	Chemical composition, %
Steel type symbol		Skin-pass symbol	Steel grade	C	Si	Mn	P	S
General purpose	SPCC	S	TAP8	≤0.10	≤0.08	0.20 - 0.50	≤0.035	≤0.035
		8	TAK8	≤0.08	≤0.08	0.20 - 0.40	≤0.025	≤0.030
		4	TAK10	0.08 - 0.12	≤0.10	0.30 - 0.60	≤0.030	≤0.035
		2	TAK12	0.10 - 0.14	≤0.10	0.30 - 0.60	≤0.030	≤0.035
		1	TAK20(*1)	0.18 - 0.23	≤0.10	0.30 - 0.60	≤0.025	≤0.030
Drawing	SPCD	S	TAP8	≤0.10	≤0.08	0.20 - 0.50	≤0.035	≤0.035
Drawing	SPCD	S	TAK8	≤0.08	≤0.08	0.20 - 0.40	≤0.025	≤0.030
Deep drawing	SPCE	S	TAK8	≤0.08	≤0.08	0.20 - 0.40	≤0.025	≤0.030

(*1)TAK20 cannot be applied to the SPCC-SB type specified in JIS G 3141.

JIS G 3141 standard

Steel type symbol	Chemical composition, %
Steel type symbol	C	Mn	P	S
SPCC	≤0.15	≤0.60	≤0.100	≤0.035
SPCD	≤0.10	≤0.50	≤0.040	≤0.035
SPCE	≤0.08	≤0.45	≤0.030	≤0.030

SAE standard

Steel type symbol	Chemical composition, %
Steel type symbol	C	Mn	P	S
SAE1008	≤0.10	0.30 - 0.50	≤0.030	≤0.05
SAE1010	0.08 - 0.13	0.30 - 0.60	≤0.030	≤0.05
SAE1012	0.10 - 0.15	0.30 - 0.60	≤0.030	≤0.05
SAE1020	0.18 - 0.23	0.30 - 0.60	≤0.030	≤0.05

Finish

Finishing category	Symbol	Remarks
Bright	B	Strips smooth-finished by smooth finished rolls

Mechanical properties

(1) Tensile strength, elongation, hardness, and bending tests of skin-passed materials (S)

Remarks	Steel type	Tensile strength, N/mm²	Elongation, %							Hardness		Bending test
		Classification by nominal thickness, mm								Takasago special standard
		0.25≤	0.25≤ <0.30	0.30≤ <0.40	0.40≤ <0.60	0.60≤ <1.00	1.0≤ <1.6	1.6≤ <2.5	2.5≤	HV	HRBS
General purpose	SPCC-SB	-	-	-	-	-	-	-	-	≤115	≤65	Bend angle: 180° Inner radius: adhesion Test method: JIS No. 3 Rolling direction
General purpose	SPCCT-SB	270≤	26≤	29≤	32≤	34≤	35≤	36≤	37≤	≤115	≤65
Drawing	SPCD-SB	270≤	28≤	31≤	34≤	36≤	37≤	38≤	39≤	≤115	≤65
Deep drawing	SPCE-SB	270≤	30≤	33≤	36≤	38≤	39≤	40≤	41≤	≤115	≤65

*No. 5 test pieces are to be used for tensile testing.

(2) Hardness and bending tests of hardened materials

Skin-pass classification	Skin-pass symbol	Rockwell hardness	Vickers hardness	Bending test
Skin-pass classification	Skin-pass symbol	HRBS	HV	Bending angle	Inner radius	Bending test piece
1/8 hardness	8	50 - 71	95 - 130	180°	Adhesion	JIS No. 3 test piece Rolling direction
1/4 hardness	4	65 - 80	115 - 150	180°	Half of thickness
1/2 hardness	2	74 - 89	135 - 185	180°	Equal to thickness
Full hard	1	85≤	170≤	-	-

*Normally, the bending test is omitted.

Dimensional tolerances

(1) Thickness tolerances

Unit: mm
Classification by nominal thickness		JIS G 3141 thickness tolerance B				Takasago special standard
Classification by nominal thickness		<160	160≤ <250	250≤ <400	400≤ <450	S standard	SS standard	U standard
0.25≤	<0.40	±0.025	±0.030	±0.035	±0.035	±0.015	±0.012	±0.010
0.40≤	<0.60	±0.035	±0.040	±0.040	±0.040	±0.020	±0.016	±0.010
0.60≤	<0.80	±0.040	±0.045	±0.045	±0.045	±0.023	±0.018	±0.012
0.80≤	<1.00	±0.04	±0.05	±0.05	±0.05	±0.026	±0.020	±0.014
1.00≤	<1.25	±0.05	±0.05	±0.05	±0.06	±0.030	±0.022	±0.016
1.25≤	<1.60	±0.05	±0.06	±0.06	±0.06	±0.035	±0.025	±0.018
1.60≤	<2.00	±0.06	±0.07	±0.08	±0.08	±0.040	±0.030	±0.020
2.00≤	<2.50	±0.07	±0.08	±0.08	±0.09	±0.050	±0.035	±0.030
2.50≤	<3.15	±0.08	±0.09	±0.09	±0.10	±0.060	±0.040	-
3.15≤	<4.00	±0.09	±0.10	±0.10	±0.11	±0.070	±0.050	-
4.00≤	<5.00	±0.10	±0.10	±0.11	±0.11	±0.08	±0.06	-
5.00≤	<6.00	±0.12	±0.12	±0.13	±0.13	±0.09	±0.07	-
6.00≤	≤7.00	±0.15	±0.15	±0.17	±0.17	±0.10	±0.08	-

Notes
1. The thickness of a steel strip is typically measured at a point within 15 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
Classification by nominal thickness		JIS G 3141 width tolerances C
Classification by nominal thickness		<160	160≤ <250	250≤ <400	400≤ <450
	<0.60	±0.15	±0.20	±0.25	±0.30
0.60≤	<1.00	±0.20	±0.25	±0.25	±0.30
1.00≤	<1.60	±0.20	±0.30	±0.30	±0.40
1.60≤	<2.50	±0.25	±0.35	±0.40	±0.50
2.50≤	<4.00	±0.30	±0.40	±0.45	±0.50
4.00≤	<5.00	±0.40	±0.50	±0.55	±0.65
5.00≤	<6.00	±0.50	±0.60	±0.65	±0.80
6.00≤	≤7.00	±0.60	±0.70	±0.75	±0.80

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FAQ

1. Can SPCC-SD be welded?

Yes. Due to its low carbon content, SPCC-SD offers excellent weldability using standard methods like spot welding, MIG, or TIG, making it ideal for assembled metal frames.

2. Is SPCC-SD rust-resistant?

No. As a cold-rolled steel without a metallic coating (like zinc), it will rust if exposed to moisture. It requires oiling, painting, or plating for corrosion protection.

3. What is the standard thickness range?

SPCC-SD is typically available in thicknesses ranging from 0.15 mm to 3.2 mm. Thicknesses above this usually fall under hot-rolled steel categories.

4. Is SPCC-SD suitable for deep drawing?

No. SPCC is for "commercial quality" (general bending). For deep drawing, you should use SPCD (Drawing) or SPCE (Deep Drawing) grades instead.

5. How should SPCC-SD be stored?

It should be stored in a dry, temperature-controlled indoor environment and kept in its original waterproof packaging to prevent "white rust" or oxidation before processing.