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

1. Classification and Chemical Composition
Class Symbol Quality Chemical Composition %
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 tensile 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.

Tensile Test Tensile Strength
N/mm2
Elongation % Tensile 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
Symbol of class
SPCC (270 Min.) (32 Min.) (34 Min.) (36 Min.) (37 Min.) (38 Min.) (39 Min.) No. 5 in the direction of rolling
SPCD 270 Min. 34 Min. 36 Min. 38 Min. 39 Min. 40 Min. 41 Min.
SPCE 270 Min. 36 Min. 38 Min. 40 Min. 41 Min. 42 Min. 43 Min.

     
Remarks: 1. The tensile 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 tensile 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
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
2.50 to 3.15, excl. 0.15 0.16

     (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   Discrimination according to nominal width
Under 1,250 1,250 or over   Under 1,250 1,250 or over
+7 +10   +3 +4
0 0   0 0
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) Camber 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-SD General Use,Furniture, Tubes, Cabinet, Drum, Automotive Parts, Electrical Parts Commercial Quality
1/8 Hard Dull Finish SPCC-8D Electrical Parts
Electronic Parts
Computer Parts
Automotive Parts
Special Hardness Quality
Bright Finish SPCC-8B
1/4 Hard Dull Finish SPCC-4D Electrical Parts
Electronic Parts
Computer Parts
Automotive Parts
Special Hardness Quality
Bright Finish SPCC-4B
1/2 Hard Dull Finish SPCC-2D Electrical Parts
Electronic Parts
Computer Parts
Automotive Parts
Special Hardness Quality
Bright Finish SPCC-2B
Full Hard Bright Finish SPCC-1B 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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