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Deformed PC Steel Bar

It has excellent mechanical properties. - As it performs yield rate by more than 90%, the quality of concrete is excellent.
- It is economical as relaxation loss is so small with in concrete product at room temperature.

Straightness is good. - As it is winded within elastic limit, it keeps straight condition when unbinding.

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Adhesive force with concrete is good. - It has strong adhesive force as 3~6 spiral holes are arranged regularly on the surface, and it improves work efficiency.

It is easy to use. - As it has high accuracy in size and regularity in cross section, you can work in tension stably.

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Mechanical Property

─ Deformed & Round Steel bar for prestressed concrete : KS D 3505-SBPD 1275/1420 for Tensile Steel ─ ks
ITEM Nominal
Diameter
(mm)		 Minimum
Yield Load
(N)		 Minimum
Tensile Load
(N)		 Minimum
Yield Stength
(N/㎟)		 Minimum
Tensile Stength
(N/㎟)		 Elongation
(%)		 Relaxation
1000hrs.
(%)		 Nominal
sec. area
(㎟)
SBPD
1275/
1420 for
Tension
Steel		 (5.1) 26,280 27,950 1,275 1,420 More than 5.0 Below 1.5 19.64
(6.1) 37,850 40,210 28.27
7.4 51,190 56,880 40
(8.3) 70,120 74,680 52.5
9.2 81,985 91,000 64
11.0 115,230 127,975 90
13.0 160,045 177,740 125
─ Deformed Steel bar for prestressed concrete : JIS G 3137 ─ ks
ITEM Nominal
Diameter
(mm)		 Minimum
Yield Load
(N)		 Minimum
Tensile Load
(N)		 Minimum
Yield Stength
(N/㎟)		 Minimum
Tensile Stength
(N/㎟)		 Elongation
(%)		 Relaxation
1000hrs.
(%)		 Nominal
sec. area
(㎟)
SBPD
1275/
1420 for
Tension
Steel		 7.1 51,190 56,880 1,275 1,420 More than 5.0 Below 2.5 40
9.0 81,985 91,000 64
(10.0) 100,090 111,470 78.5
10.7 114,230 127,975 90
(11.2) 127,500 142,000 100
12.6 160,045 177,740 125

Chemical component

Type of impurities P S Cu
Content(%) Less than 0.030 Less than 0.035 Less than 0.30