GOST 13840-68 12.0mm Seven Wire Steel Strand for Prestressed Concrete

• Customization: Available
• Material: Steel Wire
• Cross Sectional Shape: Round
• Model NO.: 9.0mm, 12.0mm, 15.0mm
• Application: Construction
• Metal Wire Drawing: Cold Drawing
• Tensil Strength: 1770-1860-1960MPa
• Structure: 1*7 Steel Wires
• Coil Weight: 2.0~4.0 Tons
• Alloy or Not: Non-Alloy
• Relaxation at 1000h Not More Than: 2.5% Max
• Place of Origin: Tianjin, China (Mainland)
• Coil Size: ID 0.70-0.72m, Od 1.0-1.5m, Width 0.76m
• Elongation at Max Load Not Less Than: 3.5% Min
• Transport Package: Export Packing
• Specification: GB, ASTM, DIN, BS, JIS
• Trademark: DaQiang
• Origin: Tianjin, China (Mainland )
• HS Code: 73121000
• Production Capacity: 6000mt Per Month

Product Description

Gost 13840-68 12.0mm seven wire steel strand for prestressed concrete    

PC STEEL STRAND / LRPC STRAND / PT CABLE / POST-TENSIONED STEEL CABLE
HIGH TENSILE LOW RELAXATION STEEL STRAND FOR PRESTRESSED CONCRETE 

Specification:
Raw Material: High carbon steel wire rod SWRH 77B SWRH 82B
Structure: 7 wires, Nominal Diameter: 9.30, 9.53, 11.11, 12.50, 12.70, 12.90, 15.24, 15.70, 17.80, 18.90, 21.60mm; 
Structure: 19 wires, Nominal Diameter: 21.8mm, 28.6mm
Standards: ASTM A416-2017, ASTM A779-2016, ASTM A886-2017, ASTM A910-2016, ASTM A475-03 (2014), AASHTO M 203-2007, ABNT NBR 7483-2020, AS 1311-1987, AS/NZS 4672.1-2017, BS5896-2012, EN10138-3-2009, GB/T5224-2014, IS6006-2014, JISG3536-2014, KSD7002-2019, UNE36094-1997, NEN3868-2001, SNI 1154-2011 
Categories: smooth plain, hot dipped galvanized, HDPE coated, epoxy resin coated. 
Tensile Strength: 1770-1860-1960MPa, Yield Strength 1570-1670-1770MPa
Relaxation: Initial load to 70% breaking load, the relaxation at 1000 hours less than 2.5% 
Elongation: Lo over 610mm, the elongation over 4.0%
Packing Method: baling strip, inner PVC film, outer damp-proof paper-plastic compound packing cloth, wood pallet. 
Package Roll Weight: 2-3 MT / 3-4 MT  

Usages:
Pre-stressing steels apply to post-tensioned and pre-tensioned concrete structure in the follow civil engineering, building construction and infrastructure projects: bridges; railway sleeper, subway track board; airport; industrial buildings, commercial buildings, residential housing foundations; PC poles, piles, beams, girders, slabs, double-T board, hollow floor board, floor, parking decks, PHC, PPCP; electric power, nuclear power station; ports, dams, water project, sewage treatment, swimming pool; rock-coil anchoring, side slope stabilization, coil mine; storage tank for national gas, oil, grain; stadiums, TV tower etc.

History:
With excellent quality, reasonable price and good after-sales service, Daqiang Brand has been China Top Ten PC Strand Brand for 6 years. Daqiang products had been used in many national key projects in China and exported to many countries, such as Australia, Bahrain, Bangladesh, Brazil, Chile, Colombia, Dominica, Ecuador, Egypt, India, Iran, Kenya, Lebanon, Malaysia, Panama, Qatar, South Korea, Sri Lanka, Thailand, Venezuela, Viet Nam etc. 

Trade Terms: 
Min Order Qty: 1 FCL / 27 M.Tons  
Price Terms: EXW FOB FCA CFR CIF 
Payment Terms: Cash, TT, LC, DP 
Date of Shipment: 10-20 days
 

Standard

Structure

Grade

Nominal Dia.

Tolerance

Cross Section Area

Mass Per 1km

Breaking Loading

Load at 1% Extension

Elangation at Max Load

The relaxation at 1000h (r%)

(in)

(mm)

(mm)

(Sn/mm²)

(Kg/1000m)

≥(KN)

≥(KN)

Lo≥500mm (%)

Low-Relaxation

Normal-Relaxation

ASTM A416

1x7

270[1860]

3/8

9.50

+0.65                 -0.15

54.84

432

102.3

92.1

3.5

2.5

3.5

 

Standard	Type	Dia.	Tolerance	Section Area	Mass	Tensile Strength	Breaking Loading	Min. Load at 1% Extenstion	Elongation	1000h Relaxation
		(mm)	(mm)	(mm2)	(g/m)	(Mpa)	Min. (KN)	Min (KN)	Min (%)	Max (%)
BS5896 -1980	Standard 7 Wire	9.3	+0.3,    -0.15	52	408	1770	92	81	3.5	2.5%
		11.0		71	557	1770	125	110
		12.5	+0.4,     -0.2	93	730	1770	164	144
		15.2		139	1090	1670	232	204
	Super 7 Wire	9.6	+0.3,     -0.15	55	432	1860	102	90
		11.3		75	590	1860	139	122
		12.9	+0.4,     -0.2	100	785	1860	186	163
		15.7		150	1180	1770	265	233

 

Standard	Grade	Nonimal Dia.		Section Area	Mass	Breaking Loading	Load at 1% Ext.	Elongation	Relaxation at 1000h
		(in)	(mm)	(mm2)	(g/m)	Min (Mpa)	(KN)	Lo 610mm min	(Initial Load to 70% of Breaking Load)
ASTM A416	270K (1860)	3/8	9.53	54.84	432	102.3	92.1	3.5% min	Low Relaxation	Normal Relaxation
		7/16	11.11	74.19	582	137.9	124.1		2.5% max	3.5% max
		1/2	12.7	98.71	775	183.7	165.3
		3/5	15.24	140.00	1102	260.7	234.6

 

Standard	Type	Dia.	Tolerance	Section Area	Mass	Tensile Strength	Breaking Loading	Min. Load at 1% Extenstion	Elongation	1000h Relaxation
		(mm)	(mm)	(mm2)	(g/m)	(Mpa)	Min. (KN)	Min (KN)	Min (%)	Max (%)
BS5896 -1980	Standard 7 Wire	9.3	+0.3,    -0.15	52	408	1770	92	81	3.5	2.5%
		11.0		71	557	1770	125	110
		12.5	+0.4,     -0.2	93	730	1770	164	144
		15.2		139	1090	1670	232	204
	Super 7 Wire	9.6	+0.3,     -0.15	55	432	1860	102	90
		11.3		75	590	1860	139	122
		12.9	+0.4,     -0.2	100	785	1860	186	163
		15.7		150	1180	1770	265	233