steel specification
DESCRIPTION
JIS G3135TRANSCRIPT
2 High Strength Steel Sheets with Improved Formability for Automobile Structural Uses
(1) JIS G3135
Tensile Test Bend Test
Elongation %
（t: Thickness） Symbol
Of Class Tensile
Strength
N/mm2
Yield Proof
Stress
N/mm2 0.6mm≦t
＜1.0mm
1.0mm≦t
≦2.3mm
Coating
Baking
Hardened
Amount
N/mm2
Test Piece Bend
Angle
Radius of
Inside surface
Test
Piece
SPFC 340 340 min. 175 min. 34 min. 35 min. ─ Tight lock
SPFC 370 370 min. 205 min. 32 min. 33 min. ─ Tight lock
SPFC 390 390 min. 235 min. 30 min. 31 min. ─ Tight lock
SPFC 440 440 min. 265 min. 26 min. 27 min. ─ Tight lock
SPFC 490 490 min. 295 min. 23 min. 24 min. ─ Tight lock
SPFC 540 540 min. 325 min. 20 min. 21 min. ─ Thickness × 0.5
SPFC 590 590 min. 355 min. 17 min. 18 min. ─ Thickness × 1.0
SPFC 490Y 490 min. 225 min. 24 min. 25 min. ─ Tight lock
SPFC 540Y 540 min. 245 min. 21 min. 22 min. ─ Thickness × 0.5
SPFC 590Y 590 min. 265 min. 18 min. 19 min. ─ Thickness × 1.0
SPFC 780Y 780 min. 365 min. 13 min. 14 min. ─ Thickness × 3.0
SPFC 980Y 980 min. 490 min. 6 min. 7 min. ─ Thickness × 4.0
SPFC 340H 340 min. 185 min. 34 min. 35 min. 30 min.
NO.5
Perpendicular
to rolling
direction
180O
Tight lock
NO.3
Perpendicular
to rolling
direction
Remark: Concerning the applied thickness of the elongation value of SPFC780Y and SPFC980Y 0.6mm and over to under 1.0 mm and 1.0 mm a
over to 2.3mm incl. shall be respectively shifted to 0.8mm and over to under 1.0 mm and 1.0 mm and over to 1.4mm incl.
(2) CSC
Tensile Test Elongation % Bend test
Thickness（t） mm Symbol
Of Class Tensile
Strength
N/mm2
Yield Proof
Stress
N/mm2 0.55mm≦
t＜1.0mm
1.0mm≦
t≦2.0mm
Test Piece Bend
Angle
Radius of
Inside
surface
Test
Piece
CF 370R 370 min. 205 min. 33 min. 34 min.
CF 390R 390 min. 235 min. 31 min. 32 min.
No.5
Perpendicular to
rolling direction180O Tight lock
No.3
Perpendicular
to rolling
direction
Remark: For the coil of CF370R and CF390R, the bend test shall be carried out on request of the purchaser.