Tungsten Carbide

Machining Cast Irons and
Non-Ferrous Alloys,
Woodworking Grades

Steel Cutting Grades
Metalforming Grades
Mining and Construction Grades
Special Wear Applications
Oil/Gas Exploration and Mining
Grades



Tungsten Heavy Alloy

Tungsten Heavy Alloy Grades

MSDS Information
Material Safety Data Sheet
for Tungsten Carbide
Material Safety Data Sheet
for Tungsten Heavy Alloy

 
 




Category: Grades / Tungsten Heavy Alloy

Grade

SD170

SD175

S180
SDD185
DENS21
DENS23
DENS25
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

  Characteristics Applications
SD170 Readily machinable using common metalworking tools and techniques. It is the ideal alloy to use in the form of rolled sheet, which is available in thicknesses ranging down to 0.020" and widths to 12".
General purpose tungsten heavy alloy that is widely used for ballast and counterbalance weights, inertial damping, and radiation shielding applications. It offers the highest ductility available within the Densalloy™ family of materials.
SD175 Like all Densalloy™ W-Ni-Fe heavy alloys, SD175 offers good corrosion resistance. Easily applied organic and metallic finishes provide additional protection in the presence of electrolytes. It is readily machinable into complex geometries.
Offers excellent combination of ductility and stiffness, making
it an ideal choice for chatter free toolholders, rigid fixtures,
high durability radiation instrument casings and radioisotope containers. Representing the best compromise in density, stiffness, and ductility, it is the best general purpose alloy in
the Densalloy™ family.
SD180 Due to its relatively high tungsten content, SD180 exhibits minimal distortion during sintering, making it an excellent choice for net shape press and sinter parts. By use of this P/M approach, maximum economy can be realized in the production of small parts.
Commonly used for small, high density balance weights. Whether in sheet or monolithic form, SD180 is also widely used for the shielding and/or collimation of gamma rays and high energy x-rays in medical imaging devices.
SD185 The very high elastic (Young’s) modulus of SD185 rivals that of pure tungsten but the alloy still retains machinability for fabrication into a variety of medical and industrial components. Strong absorber of high energy x-rays and gamma rays.
Possessing the highest density of any of the standard Densalloy™ alloys, SD185 is the preferred material for large radioisotope containers that must provide the greatest radiation attenuation possible in a given size as well as other specialized applications.
DENS21 Provides the greatest ductility of any of the low magnetic permeability Densalloy™ materials. It is readily machinable into complex geometries.
Commonly used for large radiation shielding components where the shielding is located in close proximity to magnetic fields that cannot be disturbed (as is common in modern radiotherapy devices). The composition of DENS21 provides superior mechanical properties compared to older W-Ni-Cu non-magnetic alloys.
DENS23

Provides a good balance of ductility versus stiffness in a low magnetic permeability material. It is readily machinable into complex geometries using common shop tools and techniques.

Commonly used for radiation shielding components that are
located in close proximity to magnetic fields that relate to device function and/or diagnostics and must not be distorted.
DENS25 Provides maximum attenuation of high energy x-rays and gamma rays available in a standard low magnetic permeability Densalloy™. Its very low value of magnetic permeability (µ) is comparable to that of typical austenitic stainless steels. Despite its high tungsten content, DENS25 is readily machinable into complex geometries.
Commonly used for thick radiation shielding components in modern oncology machines that are located in close proximity to magnetic fields that relate to device function and/or diagnostics and must not be disturbed.




 
Home | Products | Grades | Literature | About Us | Contact Us
Technical Support | News | Legal Notices

Copyright © ATI Firth Sterling, 2007. All Rights Reserved. Legal Notices.