Mycron Steel Bhd.

JIS G3141 COLD REDUCED CARBON STEEL SHEETS AND STRIP (1996)

1. Classification and Chemical Composition

Class	Symbol	Quality	Chemical Composition %
Class	Symbol	Quality	C	Si	Mn	P	S
Class 1	SPCC	General Use	0.12 Max.	-	0.50 Max.	0.040 Max.	0.045 Max
Class 2	SPCD	Drawing Quality Use	0.10 Max.	-	0.45 Max.	0.035 Max.	0.035 Max.
Class 3	SPCE	Deep Drawing Quality Use	0.08 Max.	-	0.40 Max.	0.030 Max.	0.030 Max.


Remarks:	1.	Where the value obtained by the tension test are guaranteed by the order of purchaser for class 1 sheet or strip normally refined or as it is annealed, its symbol for classification shall be SPCCT, which has a suffix T at the end.
	2.	Where the non-aging is guaranteed by the order of purchaser for class 3 sheet or strip normally refined or as it is annealed, its symbol for classification shall be SPCEN, which has a suffix N at the end.

2. Mechanical Properties

(1) Tensile Strength, Elongation and Non-aging Property.

Tension test	Tensile Strength N/mm2	Elongation %						Tension test piece
Division by nominal thickness mm	0.25 and over	0.25 or over to 0.40, excl.	0.40 or over to 0.60, excl.	0.60 or over to 1.0, excl.	1.0 or over to 1.6, excl.	1.6 or over to 2.5, excl.	2.5 or over	Tension test piece
Symbol of class
SPCC	(270 Min.)	(32 Min.)	(34 Min.)	(36 Min.)	(37 Min.)	(38 Min.)	(39 Min.)	No. 5 in the direction or rolling
SPCD	270 Min.	34 Min.	36 Min.	38 Min.	39 Min.	40 Min.	41 Min.	No. 5 in the direction or rolling


Remarks:	1.	The tension test value does not usually apply to SPCC. When required by the purchaser, however, the value in parentheses shall be adopted.
	2.	For those less that 0.60 mm in thickness, the tension test shall generally be omitted.
	3.	This table applies to those of 30 mm or more in width.
	4.	When the non-aging is designated for the normally refined steel sheet and strip of SPCE, it shall be guaranteed for 6 months after delivery from the manufacturing factory. The term "non-aging" means the property to produce stretcher strain during the time of being worked.

(2) Hardness and Bendability

Distinction of Thermal Refining	Symbol of Refining	Hardness		Bend Test
Distinction of Thermal Refining	Symbol of Refining	Rockwell Scale "B" HRB	Vicker HV	Bend Angle	Inside Radius	Test Piece
As annealed	A	*57 Max	*105 MAx	180°	Close contact	No. 3 in the direction of rolling
Normal refining	S	*65 Max	*115 Max	180°	Close contact
1/8 hardness	8	50 to 71	95 to 130	180°	Close contact
1/4 hardness	4	65 to 80	115 to 150	180°	0.5 x thickness
1/2 hardness	2	74 to 89	135 to 185	180°	1.0 x thickness
Full hardness	1	85 Min	170 Min	-	-
(* Only for reference)

3. Permissible Variations in Dimensions and Shapes

(1) Tolerances A on Thickness	(Unit: mm)
	Division by nominal width
Division by nominal thickness	630 or over to 1,000, excl.	1,000 or over to 1,250, excl.
0.25 to 0.40, excl.	±0.04	±0.04
0.40 to 0.60, excl.	±0.05	±0.05
0.60 to 0.80, excl.	±0.06	±0.06
0.80 to 1.00, excl.	±0.06	±0.07
1.00 to 1.25, excl.	±0.07	±0.08
1.25 to 1.60, excl.	±0.09	±0.10
1.60 to 2.00, excl.	±0.11	±0.12
2.00 to 2.50, excl.	±0.13	±0.14

(2) Width Tolerances

The width tolerances shall be as follows:

(i) The width tolerances shall be applied to the nominal width.
(ii) The width tolerances shall be classified into class A and B.

Width Tolerances, Class A (Unit: mm)

Width Tolerances, Class B (Unit: mm)

Discrimination according to nominal width

Under 1,250

1,250 or over

Under 1,250

1,250 or over

+10

Remarks:

The plus side tolerance shall not be applied to the stretched-levelled steel sheet.

(3) Tolerances A on Flatness

(Unit: mm)

Classification of warpage

Division by nominal width Bow wave Edge wave Centre Buckle

Under 1,000 12 Max. 8 Max. 6 Max.

1,000 to 1,250, excl. 15 Max. 9 Max. 8 Max.

(4) Chamber Tolerances
(Unit: mm)

Classification of Steel Sheet and Strip

Steel Sheet Steel Strip

Division by nominal width Under 2,000 in length 2,000 and over in length

30 to 60, excl. 8 Max. Max. 8 per any length of 2,000

60 to 630, excl. 4 Max. Max. 4 per any length of 2,000

630 and over 2 Max. Max. 2 per any length of 2,000

Product Range

Specification : JIS G3141

Symbol of Quality Grades Surface Finish Symbol Application / User Remarks

SPCC As-Annealed SPCC-A General Use Commercial Quality

Standard Temper Grade Dull Finish SPCC-8D General Use, Furniture, Tubes, Cabinet, Drum, Automotive Parts, Electrical Parts Commercial Quality

⅛ Hard Dull Finish SPCC-8B Electrical Parts
Electronic Parts
Computer Parts
Automotive Parts Special Hardness Quality

Bright Finish SPCC-4D

¼ Hard Dull Finish SPCC-4B Electrical Parts
Electronic Parts
Computer Parts
Automotive Parts Special Hardness Quality

Bright Finish SPCC-2D

½ Hard Dull Finish SPCC-2B Electrical Parts
Electronic Parts
Computer Parts
Automotive Parts Special Hardness Quality

Bright Finish SPCC-1B

Full Hard Bright Finish SPCC-SD Strapping / Bailing Hoop,
Motorcycle & Bicycle Parts
G.I. & Other Coated Sheet Special Hardness / Tensile Quality

SPCD Standard Temper Grade Dull Finish SPCD-SD Electrical Parts
Electronic Parts
Automotive Parts Drawing Quality

SPCE Standard Temper Grade Dull Finish SPCE-SD Electrical Parts
Electronic Parts
Automotive Parts Deep Drawing Quality

Standard Temper Grade
(Non-aging Property) Dull Finish SPCEN-SD Electrical Parts
Electronic Parts
Automotive Parts Deep Drawing Quality

Specification : JIS G3135

SPFC SPFC 340 Dull Finish Automotive Parts, Tubes Drawing Use

SPFC 370 Dull Finish Automotive Parts, Tubes Drawing Use

SPFC 390 Dull Finish Automotive Parts, Tubes Forming Use

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