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b.기계적성질(TENSILE REQUIREMENTS AND BENDING REQUIREMENTS)
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종류의 기호
Symbol |
항복점
Yield Point
kgf/㎟ |
인장강도
Tensile Strength
kgf/㎟
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연산율 Elongation % |
Bending Property |
Test Piece No. |
No.2 |
No.3 |
Angle of bending |
Ratio of bend Radius
Diameter of Specimen |
SD 30A |
30 min. |
45 ~ 61 |
16 min. |
18 min. |
180˚ |
1.5(Up to and incl. D16), 2.0(Over D16) |
SD 30B |
30 ~ 40 |
45 min. |
16 min. |
18 min. |
180˚ |
1.5(Up to and incl. D16), 2.0(Over D16) |
SD 35 |
35 ~ 45 |
50 min. |
18 min. |
20 min. |
180˚ |
1.5(Up to and incl. D16), 2.0(Over D41),2.5(Over D51) |
SD 40 |
40 ~52 |
57 min. |
16 min. |
18 min. |
180˚ |
2.5 |
SD 50 |
50 ~ 64 |
63 min. |
12 min. |
14 min. |
90˚ |
2.5(Up to and incl. D25), 3.0(Over D25) |
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