tungsten fishing sinkers 1.High density,High strength 2.smaller volume 3.Low thermal expansion coefficient 4.High modulus

tungsten fishing sinkers

Introduction

Tungsten heavy alloy parts are materials with tungsten(mainly)and low amounts of Ni,Fe ,Cu,Co,Mo,Cr etc(less then 15%). Luoyang achemetal Co., Ltd produce Tungsten Heavy Alloys with density from 16.8g/cm3 to 18.7g/cm3.Tungsten heavy alloys are generally refractory metal, which have two-phase composites consisting of W-Ni- Fe or W-Ni- Cu or even W-Ni-Cu-Fe, some tungsten alloy is added with Co,Mo,Cr, etc. They have very high melting point and have a density twice that of steel and are more than 50% heavier than lead. Tungsten content in conventional heavy alloys varies from 90 to 98 weight percent and is the reason for their high density (between 16.5 and 18.75 g/cc). Nickel, iron and copper serve as a binder matrix, which holds the brittle tungsten grains together and makes the alloys ductile and easy to machine.

Applications:

 1, Radiation shield, collimator, nuclear shielding, beamstop, PET syringe shield, vial shield, isotope container, FDG container, multi leaf collimator ,  2, Balanced part; tungsten sinker bar, heavy metal boring bar, tuyacht, sailboat, submarine and other vessels crank camshafts, holders for Well Logging, Racing Weights. vibration damping and dynamic balancing. Tungsten sinker bar,  Tungsten bucking bar, Tungsten boring bar, Tungsten Sinkers, tungsten alloy counterweights for golf and tungsten alloy dart parts spheres, cubes, and projectile shapes  3, High-temperature die, Electroheat , brass and copper, Tooling for low-pressure die-casting of aluminium and brass, Hot upsetting dies, Filler rods for die repair, upsetting anvil block, electrical rivet  4, Shrapnel head; Penetrators 5, Electrical contact; 6, Balanced ball for missile and plane;  golf and tungsten alloy dart parts spheres, cubes, and projectile shapes  7, Core for armourpiercing bullet measurement

Tungsten heavy Alloy generally is two-phase composite consisting of W-Ni- Fe or W-Ni- Cu or even W-Ni-Cu-Fe. Tungsten content in conventional tungsten heavy alloys varies from 90 to 98 weight percent and is the reason for their high density (between 17 and 18.6 g/cc). Nickel, iron and copper serve as a binder matrix, which holds the brittle tungsten grains together and which makes tungsten heavy alloys ductile and easy to machine. Nickel-iron is the most popular additive, in a ratio of 7Ni:3Fe or 8Ni:2Fe (weight ratio). The conventional processing route for tungsten heavy alloys includes mixing the desired amount of elemental powders, followed by cold pressing and liquid phase sintering to almost full density. The matrix tungsten heavy alloy melts and takes some tungsten into solution during liquid phase processing, resulting in a microstructure through which large tungsten grains (20-60um) are dispersed in the matrix alloy. The as-sintered material often is subjected to thermo mechanical processing by swaging and aging, which results in increased strength and hardness in the tungsten heavy alloys.Tungsten Heavy Alloy Main Application: For making rotors of dynamic inertial materials, the stabilizers of aircraft wings, shielding materials for radioactive materials, containers in hospitals and for radioactive isotope (Cobalt 60), and for material of armor piercing bullets and moulds, etc. 

Material Specifications
Mil. T-21014 Rev. D	Class 1	Class 2	Class 3	Class 4	Class 1	Class 2	Class 3
SAE-AMS-T-21014	Class 1	Class 2	Class 3	Class 4	Class 1	Class 2	Class 3
AMS 7725 B	7725B	—	—	—	7725B	—	—
ASTM-B-777-87	Class 1	Class 2	Class 3	Class 4	Class 1	Class 2	Class 3
Minimum Density (g/cc)	16.85	17.15	17.75	18.25	16.85	17.15	17.75
Minimum Density (lbs/in3)	0.608	0.619	0.641	0.659	0.608	0.619	0.641
Nominal W Content (wt.%)	90	92.5	95	97	90	92.5	95
Nominal Nickel Content (wt.%)	7.1	5.4	3.6	2.1	8.8	6.6	4.4
Nominal Iron Content (wt.%)	2.9	2.1	1.4	0.9	1.2	0.9	0.6
Maximum Magnetic Perm	n/a	n/a	n/a	n/a	<1.05	<1.05	<1.05
Typical Hardness (HRC)	28	28	29	30	28	28	29
Modulus of Elasticity (x106 psi)	45	48	50	52	45	48	50
Ultimate Tensile Strength Min. (ksi)	120	120	120	110	110	110	110
0.2% Offset Yield Strength Min (ksi)	80	80	80	80	75	75	75
Minimum % Elongation (1" Gauge Length)	10	8	6	2	4	3	3

 AdvantagesHigh density (16.5~18.75 g/ cm3)High tensile strength (700-1000Mpa)Good electrical conductivityLow thermal expansionGood corrosion resistanceGood weldablityGood machinabilityHigh absorption capacity against X-rays and γ rays, 30-40% higher than leadHarmless to health and environmentNon-magnetic, if specifically requiredThe above advantages have made this alloy a candidate for defense and civilian applications. They are widely used in many fields such as aerospace, military, oil logging, electrical appliance, medical, etc.

DIA	weight(g)	TOL
1.5	0.03	±0.01mm
2.0	0.075
3.0	0.25
4.0	0.6
5.0	1.18
6.0	2.03
7.0	3.23
8.0	4.82
9.0	6.87
10.0	9.42

fishing sinkers/tackle