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PC Steel Strand

Low Relaxation Prestressed Concrete Steel Wire Strand, normally we call it PC STRAND production process has strict quality. PC Strand (Bonded Prestressed Concrete Wire Strand) are made of high carbon steel wire rods, which are cold-drawn into steel wires after surface treatment, and then a certain amount of steel wires are synthesized into strands, and then subjected to a stress-relieving stabilization process. To extend durability, the wire can be coated with a metal or non-metal coating or coating such as galvanized or epoxy. To increase the grip strength of the concrete, the surface can be scored. Unbonded prestressed steel strands are made of ordinary prestressed steel strands, coated with antiseptic grease or paraffin and coated with high density polyethylene（HDPE）.

Common sizes: 9.3mm,9.53mm,11.11mm,11.3mm,12.5mm,12.7mm,15.24mm,15.7mm.

Raw Materials: High-carbon steel wire rods, SWRH 82B，SWRH77B

Production Process : Material Inspection，Acid-washing ,Inspection Wiredrawing ,Inspection Left lay ,Circular cylinder ,Package ,inspection

Features:
1）High tensile strength, low relaxation, stable modulus of elasticity, stress-relieved, firm connection with concrete, low stress, stable construction, good combination with steel reinforced concrete; saving material, reducing distortion and construction weight, increasing the abrasion resistance, water resistance, stiffness.
2）We offer PC Strand which confirm to the technical standards such as GB/T 5223, GB/T 5224, ASTM A-416, BS 5896, JIS G3536 or the standards agreed by both of the customers and us.
3）PC strand can also be supplied in various forms for pre- or post-tensioning applications, with plain or galvanized material ranging from 3 wires, 7 wires, 19 wire and compacted construction.

Application
1）Our PC strand is mainly used for the reinforcement of prestressed concrete structures, such as large-span railway and road bridges, major bridges, silos, buildings, dams, floor slabs, foundations, large concrete vessels, atomic reactor buildings, stadiums, airport hangers, pre-cast segments, crane beams, anchorages and multi-storey industrial buildings etc.
2）Our PC strand is also used for the construction of highways, poles and water towers in civil construction, and energy source sea transportation, house buildings, water control projects, and rock and earth anchoring components to increase the tensile force.

1×2 Structure strand size and tolerance, reference quality per meter
Strand Structure	Nominal Diameter		Strand Diameter Tolerance /mm	Strand reference sectional area Sn/mm²	Strand reference quality per meter/(g/m)
Strand Structure	Strand Diameter Dn/mm	Wire Diameter d/mm	Strand Diameter Tolerance /mm	Strand reference sectional area Sn/mm²	Strand reference quality per meter/(g/m)
1×2	5.00	2.50	+0.15 -0.05	9.82	77.1
	5.80	2.90	+0.15 -0.05	13.2	104
	8.00	4.00	+0.25 -0.10	25.1	197
	10.00	5.00		39.3	309
	12.00	6.00		56.5	444

1×3 Structure strand size and tolerance, reference quality per meter
Strand Structure	Nominal Diameter		Strand Measurement A/mm	Measurement A Tolerance /mm	Strand reference sectional area Sn/mm²	Strand reference quality per meter/(g/m)
Strand Structure	Strand Diameter Dn/mm	Wire Diameter d/mm	Strand Measurement A/mm	Measurement A Tolerance /mm	Strand reference sectional area Sn/mm²	Strand reference quality per meter/(g/m)
1×3	6.20	2.90	5.41	+0.15 -0.05	19.8	155
	6.50	3.00	5.60	+0.15 -0.05	21.2	166
	8.60	4.00	7.46	+0.20 -0.10	37.7	296
	8.74	4.05	7.56		38.6	303
	10.80	5.00	9.33		58.9	462
1×3 I	12.90	6.00	11.20		84.8	666
1×3 I	8.74	4.05	7.56		38.6	303

1×7 Structure strand size and tolerance, reference quality per meter
Strand Structure	Nominal Diameter Dn/mm	Diameter Tolerance /mm	Strand reference sectional area Sn/mm²	Strand reference quality per meter/(g/m)	Center wire diameter (do) enlarged range/% not less than
1×7	9.50	+0.30 -0.15	54.8	430	2.5
	11.10	+0.30 -0.15	74.2	582
	12.70	+0.40 -0.20	98.7	775
	15.20		140	1101
	15.70		150	1178
	17.80		191	1500
(1×7)C	12.70	+0.4 -0.20	112	890
	15.20		165	1295
	18.00		223	1750

1×2 Mechanical properties of structural steel strand
trand Structure	Strand nominal diameter Dn/mm	Abstract tensile strength Rm/Mpa not less than	The largest force of the whole strand Fm/kN not less than	Rated non-proportional extension force	Total extension ratio at the largest force (Lo≥400)Agt/% not less than	Stress Relaxation
trand Structure	Strand nominal diameter Dn/mm	Abstract tensile strength Rm/Mpa not less than	The largest force of the whole strand Fm/kN not less than	Rated non-proportional extension force		Initial load equivalent to the percentage of the nominal largest force/%	After 1000h stress relaxation rate r/% not less than
1×2	5.00	1570	15.4	13.9	3.5	60 70 80	1.0 2.5 4.5
		1720	16.9	15.2
		1860	18.3	16.5
		1960	19.2	17.3
	5.80	1570	20.7	18.6
		1720	22.7	20.4
		1860	24.6	22.1
		1960	25.9	23.3
	8.00	1470	36.9	33.2
		1570	39.4	35.5
		1720	43.2	38.9
		1860	46.7	42.0
		1960	49.2	44.3
	10.0	1470	57.8	52.0
		1570	61.7	55.5
		1720	67.6	60.8
		1860	73.1	65.8
		1960	77.0	69.3
	12.00	1470	83.1	74.8
		1570	88.7	79.8
		1720	97.2	87.5
		1860	105	94.5
Note: Rated non-proportional extension force Fp0.2 is not less than 90% of the largest force of the whole strand

1×3 Mechanical properties of structural steel strand
Strand Structure	Strand nominal diameter Dn/mm	Abstract tensile strength Rm/Mpa not less than	The largest force of the whole strand Fm/kN not less than	Rated non-proportional extension force	Total extension ratio at the largest force (Lo≥400)Agt/% not less than	Stress Relaxation
Strand Structure	Strand nominal diameter Dn/mm	Abstract tensile strength Rm/Mpa not less than	The largest force of the whole strand Fm/kN not less than	Rated non-proportional extension force		Initial load equivalent to the percentage of the nominal largest force/%	After 1000h stress relaxation rate r/% not less than
1×3	6.20	1570	31.1	28.0	3.5	60 70 80	1.0 2.5 4.5
		1720	34.1	30.7
		1860	36.8	33.1
		1960	38.8	34.9
	6.50	1570	33.3	30.0
		1720	36.5	32.9
		1860	39.4	35.5
		1960	41.6	37.4
	8.60	1470	55.4	49.9
		1570	59.2	53.3
		1720	64.8	58.3
		1860	70.1	63.1
		1960	73.9	66.5
	8.74	1570	60.6	54.5
		1670	64.5	58.1
		1860	71.8	64.6
	10.80	1470	86.6	77.9
		1570	92.5	83.3
		1720	101	90.9
		1860	110	99.0
		1960	115	104
	12.90	1470	125	113
		1570	133	120
		1720	146	131
		1860	158	142
		1960	166	149
	8.74	1570	60.6	54.5
		1670	64.5	58.1
		1860	71.8	64.6
Note: Rated non-proportional extension force Fp0.2 is not less than 90% of the largest force of the whole strand

1×7 Mechanical properties of structural steel strand
Strand Structure	Strand nominal diameter Dn/mm	Abstract tensile strength Rm/Mpa not less than	The largest force of the whole strand Fm/KN not less than	Rated non-proportional extension force	Total extension ratio at the largest force (Lo≥400)Agt/% not less than	Stress Relaxation
Strand Structure	Strand nominal diameter Dn/mm	Abstract tensile strength Rm/Mpa not less than	The largest force of the whole strand Fm/KN not less than	Rated non-proportional extension force		Initial load equivalent to the percentage of the nominal largest force/%	After 1000h stress relaxation rate r/% not less than
1×7	9.50	1720	94.3	84.9	3.5	60 70 80	1.0 2.5 4.5
		1860	102	91.8
		1960	107	96.3
	11.10	1720	128	115
		1860	138	124
		1960	145	131
	12.70	1720	170	153
		1860	184	166
		1960	193	174
	15.20	1470	206	185
		1570	220	198
		1670	234	211
		1720	241	217
		1860	260	234
		1960	274	247
	15.70	1770	266	239
	15.70	1860	279	251
	17.80	1720	327	294
	17.80	1860	353	318
(1×7)C	12.70	1860	208	187
	15.20	1820	300	270
	18.00	1720	384	346
Note: Rated non-proportional extension force Fp0.2 is not less than 90% of the largest force of the whole strand