Rockbolts and cables

Rockbolts and cables for roadway roof support here usually use 21.8mm 19-wire pc strand . We have very familiar experience in manufacturing this specification.

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ADVANTAGES

Raw material control: 82B high carbon wire rod with sorbite volume fraction of more than 85% is selected, the non-metallic inclusion grade is less than 2.0, and there is no high magnification microstructure defects such as reticular structure and martensite. 82B Ф 14.0 mm tensile strength not less than 1220 MPa, 82B Ф 13.0 mm tensile strength not less than 1200 MPa, 82B Ф 8.0 mm tensile strength not less than 1180 MPa; The elongation after fracture shall not be less than 9%, and the reduction of area shall not be less than 30%; Metallographic structure with a volume fraction of over 85% of sorbite

Drawing process: Control the drawing speed, reduce the deformation rate, and enable the steel wire to achieve high tensile strength while also achieving better plasticity and toughness.

After twisting: tension (240 ± 10) kN, tempering temperature (390 ± 5) ℃. Make the steel strand have better performance under loads exceeding 90% of the maximum force.

USE

-Where can our Rockbolts and cables be used?

Roadway Roof Rock anchoring

SPECIFICATIONS

Structure	Standard	Nominal diameter	Tolerance on Diameter	Nominal Area of Section	Weight of strand	Tensile Strength, Rm	Minimum Breaking load,Fm	0,2% proof force , Fp0.2	Elongation Lo=500mm, Agt	Curvative of strand	Lay Length	The Relaxation at 1000h (initial load to 70% of nominal max load ) (r/%) Not more than
		(mm)	(mm)	(mm2)	(kg/1000m)	(N/mm2)	KN	KN	(%)	mm	mm
1x19S(1+9+9)	GB/T5224-2014	21.8	+0.40,-0.15	313	2482	1770	554	488	3.5	25	(12-18)d	2.5
1x19S(1+9+9)	GB/T5224-2014	21. 8	+0.40,-0.15	313	2482	1810	567	499	3.5	25	(12-18)d	2.5
1x19S(1+9+9)	GB/T5224-2014	21. 8	+0.40,-0.15	313	2482	1860	583	513	3.5	25	(12-18)d	2.5
1x19S(1+9+9)	GB/T31314-2014	21. 8	+0.60,-0.25	313	2482	1810	567	499	3.5	25	(12-18)d	2.5
1x19S(1+9+9)	GB/T31314-2014	21. 8	+0.60,-0.25	313	2482	1860	583	513	3.5	25	(12-18)d	2.5

PACKAGE

As per clients’ requirement