|
MECHANICAL PROPERTIES
Hardness & Tensile strength test
|
Classification |
Symbol |
Temper Grade |
Tension test |
Hardness |
Bending test |
|
Distinction of refining |
Symbol of refining |
Tensile strength
(kgf/mm2) |
(Hv) |
Bending Angle |
Inside radius |
|
Class 1 |
SCP 1 |
as annealed |
A |
28 min |
105 max |
180 ํ |
Close contact |
|
skin passed |
S |
28 min |
115 max |
180 ํ |
Close contact |
|
1/8 hard |
1/8H |
30~42 |
95~130 |
180 ํ |
Close contact |
|
1/4 hard |
1/4H |
38~50 |
115~150 |
180 ํ |
Thickness 0.5 |
|
1/2 hard |
1/2H |
45~60 |
135~185 |
180 ํ |
Thickness 1.0 |
|
Full hard |
H |
56 min |
170 min |
- |
- |
|
Class 2 |
SCP 2 |
skin passed . annealed |
S,A |
28 min |
110 max |
180 ํ |
Close contact |
|
Class 3 |
SCP 2 |
skin passed . annealed |
S,A |
28 min |
110 max |
180 ํ |
Close contact |
Remark:
Tension test applies to those whose
thickness is 0.25 mm up and width is
30 mm up
Elongation test
Thickness (mm)
Spec |
Elongation (%) |
Test piece |
|
0.25~0.40 |
0.40~0.60 |
0.60~10 |
1.0~1.6 |
1.6~2.5 |
2.5 min |
|
SPCC |
(32 min) |
(34 min) |
(36 min) |
(37 min) |
(38 min) |
(39 min) |
No.5, rolling direction |
|
SPCD |
34 min |
36 min |
38 min |
39 min |
40 min |
41 min |
|
SPCE |
36 min |
38 min |
40 min |
41 min |
42 min |
33 min |
Remark:
SPCC is originally not applied to
elongation test, but in case of
customer's request' the figure of (
) is applied
Tolerance on Thickness & Width
|
Thickness |
Tolerance on Thickness |
Tolerance on Width |
|
Standard |
Standard |
|
Width 160 Excl under |
Width 160 and over |
Width 250 and over |
Width 250 over |
Width 160 Excl under |
Width 160 and over |
Width 250 and over |
Width 250 over |
|
0.10 over~0.16 excl under |
 0.015 |
0.020 |
0.030 |
0.030 |
0.1 |
0.15 |
0.15 |
0.15 |
|
0.16 over~0.25 excl under |
0.020 |
0.025 |
0.035 |
0.035 |
0.15 |
0.20 |
0.25 |
0.30 |
|
0.25 over~0.40 excl under |
0.025 |
0.030 |
0.040 |
0.040 |
|
0.40 over~0.60 excl under |
0.035 |
0.040 |
0.045 |
0.045 |
|
0.60 over~0.80 excl under |
0.040 |
0.045 |
0.050 |
0.050 |
0.20 |
0.25 |
0.25 |
0.30 |
|
0.80 over~1.00 excl under |
0.040 |
0.050 |
0.050 |
0.060 |
|
1.00 over~1.25 excl under |
0.050 |
0.050 |
0.060 |
0.060 |
0.20 |
0.30 |
0.30 |
0.40 |
|
1.25 over~1.60 excl under |
0.050 |
0.060 |
0.080 |
0.080 |
|
1.60 over~2.00 excl under |
0.060 |
0.070 |
0.080 |
0.090 |
0.25 |
0.35 |
0.40 |
0.50 |
|
2.00 over~2.50 excl under |
0.070 |
0.080 |
0.090 |
0.100 |
|
2.50 over~3.15 excl under |
0.080 |
0.090 |
0.100 |
0.110 |
0.30 |
0.40 |
0.45 |
0.50 |
|
3.15 over |
0.090 |
0.100 |
|
|
Remark: 1.
Steel Strip of more accurate
thickness than above tolerance limit
can be manufactured in accordance
with customer' s request.
2.
Thickness check point must be on any
points of 15mm and over from the
edge.
In case of 30mm under in width, it
must be on center point of width.
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