CMW High-Density Metals

CMW® materials are a family of readily machinable, environmentally friendly, tungsten-based materials with densities of 50% greater than that of lead. Such additives as copper, nickel, iron and molybdenum, combined with tungsten through powder metallurgy, create materials with unique properties for military and industrial applications. All CMW® high-density materials are more than 85% tungsten.

These materials are DFARS Compliant and meet the MIL-T-21014, AMS 7725 and AMS-T-21014 specifications and ASTM B777 standards, as needed.

Click on the links below to learn more about our materials.

High-Density Metal	Composition % by Weight	Density g/cm³ or lb/in³		Hardness Rockwell	Specifications
CMW® 1000	90W; 6Ni; 4Cu	17	0.614	24 HRC	AMS 7725C Ty 1
					AMS-T-21014 Cl 1
					MIL-T-21014D Cl 1
					ASTM B777 Cl 1
CMW® 3000	90W; 7Ni; 3Fe	17	0.614	25 HRC	AMS 7725C Ty 2
					AMS-T-21014 Cl 1
					MIL-T-21014D Cl 1
					ASTM B777 Cl 1
CMW® 2925	92.5W; 4.5Ni; 3Cu	17.5	0.632	25 HRC	AMS-T-21014 Cl 2
					MIL-T-21014D Cl 2
					ASTM B777 Cl 2
CMW® 3925	92.5W; 5.25Ni; 2.25Fe	17.5	0.632	26 HRC	AMS-T-21014 Cl 2
					MIL-T-21014D Cl 2
					ASTM B777 Cl 2
CMW® 2000	95W; 3.5Ni; 1.5Cu	18	0.65	27 HRC	AMS-T-21014 Cl 3
					MIL-T-21014D Cl 3
					ASTM B777 Cl 3
CMW® 3950	95W; 3.5Ni; 1.5Fe	18	0.65	28 HRC	AMS-T-21014 Cl 3
					MIL-T-21014D Cl 3
					ASTM B777 Cl 3
CMW® 3970	97W; 2.1NI; 0.9Fe	18.5	0.668	30 HRC	AMS-T-21014 Cl 4
					MIL-T-21014D Cl 4
					ASTM B777 Cl 4

These materials are more specific to unique applications:

Anviloy® 1150
Anviloy® Weld Rod
CMW® 1700 Race Weight
Thermkon® Copper-Tungsten and Thermkon® Copper-Molybdenum
NO-CHAT® and NO-CHAT® Max
Elkonite® 40W3 Copper Tungsten and Elkonite® 50W3 Copper Tungsten

CMW® 1000

CMW® 1000 (NO-CHAT®) material one of CMW's lower density liquid phase sintered machinable tungsten products. It is favored by many designers requiring high density materials. CMW markets this material as chatter resistant boring bars (and round stock to make boring bars) under the trade name NO-CHAT®.

Specifications
Availability
Properties
Machining Guidelines
Welding & Joining Guidelines
MSDS Sheets

Specifications:
CMW® 1000 is "Class 1" material per MIL-T-21014D, and ASTM B777. It also meets the requirements of AMS-7725. It is also DFARS compliant.

Availability:
CMW® 1000 is available as finished machined parts or as short rod, round bar, and rectangular blocks. The following limitations apply:

125 lb [50 kg] maximum weight (approx 0.1 cu ft).
Rod Diameters: 0.093" min. - 0.187" max. dia. by 7" maximum length
[2.36mm min. - 4.75mm max. dia. by 17.8cm maximum length.]
Round Bar Diameters: 0.125" min. - 4" max. dia. by 12" maximum length.
[3.18mm min. - 102mm max. dia. by 39.5cm maximum length]
Blocks: 0.187" min. - 4" max. thickness; 4" max width; 12" max length
[4.75mm min. - 102mm max. thickness; 10.2cm max width; 39.5cm max. length]
Larger units may be assembled using multiple pieces within these guidelines.

CMW® 2000

CMW® 2000 material is one of CMW's 18 g/cm³ sintered machinable tungsten products. It is favored where designs require this density, very low magnetic characteristics, and better economics than other alternatives.

Specifications
Availability
Properties
Machining Guidelines
Welding & Joining Guidelines
MSDS Sheets

Specifications:
CMW® 2000 is "Class 3" material per MIL-T-21014D, and ASTM B777.

Availability:
CMW® 2000 is available as finished machined parts or as short rod, round bar, and rectangular blocks. The following limitations apply:

125 lb [50 kg] maximum weight (approx 0.1 cu ft).
Rod Diameters: 0.093" min. - 0.187" max. dia. by 7" maximum length.
[2.36mm min. - 4.75mm max. dia. by 17.8cm maximum length.]
Round Bar Diameters: 0.125" min. - 4" max. dia. by 12" maximum length.
[3.18mm min. - 102mm max. dia. by 39.5cm maximum length]
Blocks: 0.187" min. - 4" max. thickness; 4" max width; 12" max length
[4.75mm min. - 102mm max. thickness; 10.2cm max width; 39.5cm max. length]
Larger units may be assembled using multiple pieces within these guidelines.

CMW® 3000

CMW® 3000 material is one of CMW's 17 g/cm³ sintered machinable tungsten products. It is favored where (in addition to the density) maximum ductility and strength are required for the application.

Specifications
Availability
Properties
Machining Guidelines
Welding & Joining Guidelines
MSDS Sheets

Specifications:
CMW® 3000 is "Class 1" material per MIL-T-21014D, and ASTM B777. It also meets the requirements of AMS-7725.

Availability:
CMW® 3000 is available as finished machined parts or as short rod, round bar, and rectangular blocks. The following limitations apply:

125 lb [50 kg] maximum weight (approx 0.1 cu ft).
Rod Diameters: 0.093" min. - 0.187" max. dia. by 7" maximum length.
[2.36mm min. - 4.75mm max. dia. by 17.8cm maximum length.]
Round Bar Diameters: 0.125" min. - 2" max. dia. by 12" maximum length.
[3.18mm min. - 51mm max. dia. by 39.5cm maximum length]
Blocks: 0.187" min. - 2" max. thickness; 4" max width; 12" max length
[4.75mm min. - 51mm max. thickness; 10.2cm max width; 39.5cm max. length]
Larger units may be assembled using multiple pieces within these guidelines.

CMW® 3950

CMW® 3950 material is one of CMW's 18 g/cm³ sintered machinable tungsten products. It is favored over CMW® 2000 where (in addition to the density) maximum ductility and strength are required for the application.

Specifications
Properties
Machining Guidelines
Welding & Joining Guidelines
MSDS Sheets

Specifications:
CMW® 3950 is "Class 3" material per MIL-T-21014D, and ASTM B777.

Availability:
CMW® 3950 is available as finished machined parts or as short rod, round bar, and rectangular blocks. The following limitations apply:

125 lb [50 kg] maximum weight (approx 0.1 cu ft).
Rod Diameters: 0.093" min. - 0.187" max. dia. by 7" maximum length.
[2.36mm min. - 4.75mm max. dia. by 17.8cm maximum length.]
Round Bar Diameters: 0.125" min. - 4" max. dia. by 12" maximum length.
[3.18mm min. - 102mm max. dia. by 39.5cm maximum length]
Blocks: 0.187" min. - 4" max. thickness; 4" max width; 12" max length
[4.75mm min. - 102mm max. thickness; 10.2cm max width; 39.5cm max. length]
Larger units may be assembled using multiple pieces within these guidelines.

CMW® 3970

CMW® 3970 material has the maximum density (18.5 g/cm³ of all of CMW's sintered machinable tungsten products. It is favored where maximum density with good strength and ductility are required for the application.

Specifications
Availability
Properties
Machining Guidelines
Welding & Joining Guidelines
MSDS Sheets

Specifications:
CMW® 3970 is "Class 4" material per MIL-T-21014D, and ASTM B777.

Availability:
CMW® 3970 is available as finished machined parts or as short rod, round bar, and rectangular blocks. The following limitations apply:

125 lb [50 kg] maximum weight (approx 0.1 cu ft).
Rod Diameters: 0.093" min. - 0.187" max. dia. by 7" maximum length.
[2.36mm min. - 4.75mm max. dia. by 17.8cm maximum length.]
Round Bar Diameters: 0.125" min. - 4" max. dia. by 12" maximum length.
[3.18mm min. - 102mm max. dia. by 39.5cm maximum length]
Blocks: 0.187" min. - 4" max. thickness; 4" max width; 12" max length
[4.75mm min. - 102mm max. thickness; 10.2cm max width; 39.5cm max. length]
Larger units may be assembled using multiple pieces within these guidelines.

Anviloy® 1150

Anviloy® 1150 is a tungsten-based material made using special high temperature powder metallurgy techniques. Anviloy® 1150 material has a low coefficient of thermal expansion, good thermal conductivity and good material properties at elevated temperatures. Tungsten is used as a base due to its high melting point and low coefficient of thermal expansion. Elements added to the tungsten enhance machinability, ductility and welding. The excellent thermal conductivity provides an additional benefit to increase cooling in difficult to cool areas and thus potentially increases die casting production rates. Material properties are established during the manufacturing of Anviloy® 1150 which eliminate the problems associated with heat treatment of other tool materials.

Anviloy® 1150 was developed primarily as an alternative to H-13 Tool Steels for die cast tooling to save you time and money. It's typically used for core pins/rods which create thru-holes, cavities, and indentations inside the castings.

With Anviloy® 1150 as the base for your dies, you will be pleasantly surprised with:

How does it work?
Availability
Standard Sizes
Comparison of Anviloy® 1150 with other materials
3^rd Party Testing & Results
Properties
Machining Guidelines
Welding & Joining Guideilnes
Electrical Discharge Machining (EDM) of Anviloy® 1150
Helpful Tips
MSDS Sheets

How does it work?
Anviloy® 1150 is a tungsten-based material made using special high temperature powder metallurgy techniques. Anviloy® 1150 material has a low coefficient of thermal expansion, good thermal conductivity and good material properties at elevated temperatures. Tungsten is used as a base due to its high melting point and low coefficient of thermal expansion. Elements added to the tungsten enhance machinability, ductility and welding. The excellent thermal conductivity provides an additional benefit to increase cooling in difficult to cool areas and thus potentially increases production rates. Material properties are established during the manufacturing of Anviloy® 1150 which eliminates the problems associated with heat treatment of other tool materials.

Benefits/Advantages:

Removes heat four times faster than traditional tool steel
Reduces sticking
Low erosion rate
Provides additional cooling
Readily machinable
Requires no pre or post machining heat treatment
Easily welded and repaired with Anviloy® Weld Rod
Contains no Beryllium

Availability:
Anviloy® 1150 is available in a line of rough shapes and finished products. Material is stocked in Rough Oversize to Finish (ROTF) round bars 3/16" to 4" dia. x 12" long. Rectangular bars and finished products can be readily manufactured to your specifications.

The high density tungsten alloys shrink considerably during sintering. Depending upon design and configuration, parts may be pressed and sintered close to final size and configuration to minimize machining costs. Special shapes can often be pressed in the die and sintered to near net shape.

CMW can provide a finish machined part to your specification or provide an "as sintered" blank ready for machining. If you are purchasing sintered blanks for machining, CMW engineers will work closely with you to keep your cost low through the use of a wide range of available tools or recommend new tooling to reduce material and machining cost. When requesting a blank for machining, please specify your machined size so that the best ROTF (rough oversized to finish) part can be provided.

Material up to 4" in diameter is kept in stock for same day shipment. Larger diameters and rectangular cross sections can be provided upon request. Stock diameters are available as sintered (ROTF) or finish machined to a +.010/-.000 tolerance.

Please see below for a list of Anviloy® 1150 standard sizes, part numbers and weight/bar. If you prefer a Finish Machined Bar, please add the letter F to the end of the part number, i.e. 50-04935-48F.

Anviloy® 1150 Standard Sizes, Part Numbers and Weight:

Download the Chart in PDF format

Diameter/ Length	Part Number	Lbs./Bar
1/2 x 12"	50-04935-48	2.5
5/8 x 12"	50-07130-48	3.6
3/4 x 12"	50-04936-48	4.6
7/8 x 12"	50-04937-48	6.6
1 x 12"	50-04938-48	7.6
1-1/8 x 12"	50-06829-48	10.1
1-1/4 x 12"	50-04939-48	11.5
1-3/8 x 12"	50-08505-48	14.6
1-1/2 x 12"	50-04940-48	16.2
1-5/8 x12"	50-07890-48	19.9
1-3/4 x 12"	50-04941-48	21.9
1-7/8 x 12"	50-09418-48	25.9
2 x 12"	50-04942-48	28.8
2-1/4 x 12"	50-04943-48	38.1
2-1/2 x 12"	50-04944-48	47.1
2-5/8 x 12"	50-05000-48	49.1
2-3/4 x 12"	50-07715-48	55.0
3 x 12"	50-04945-48	66.4
3-1/4 x 12"	50-07637-48	71.9
3-1/2 x12"	50-08115-48	85.1
3-3/4 x12"	50-06392-48	96.1
4 x 12"	50-04946-48	108.5

A Comparison of Anviloy® 1150 Properties with H-13 Hot Work Tool Steel

Download the Chart in Word format

	Units	Anviloy® 1150	H-13 Tool Steel
Typical Room Temperature Mechanical Properties
Ultimate Tensile Strength	psi	140000	233000
Ultimate Tensile Strength	MPa	965	1610
Yield Strength, 0.2% Offset	psi	125000	192000
Yield Strength, 0.2% Offset	MPa	862	1320
Elongation	% in 2 inches	3	13.1
Hardness	HRC	34	45
Elevated Temperature Tensile Properties
UTS at 1000 °F (537 °C)	psi	113000	142000
UTS at 1000 °F (537 °C)	MPa	779	979
UTS at 1200 °F (648 °C)	psi	105000	85000
UTS at 1200 °F (648 °C)	MPa	724	586
UTS at 1500 °F (815 °C)	psi	75000	20500
UTS at 1500 °F (815 °C)	MPa	517	141
Coefficient of Thermal Expansion (CTE)
68 - 750 °F (20 - 400 °C)	x 10-6 in/in/°F	2.52	6.8
68 - 750 °F (20 - 400 °C)	x 10-6 m/m/°C	4.54	12.2
68 - 1450 °F (20 - 788 °C)	x 10-6 in/in/°F	2.92	7.5
68 - 1450 °F (20 - 788 °C)	x 10-6 m/m/°C	5.26	13.5
Thermal Conductivity	Btu/h/°F	74	19.3
Thermal Conductivity	W/m/°F	128	34.3
Density	lb/in³	0.623	0.28
Density	g/cm³	17.25	7.76

3rd Party Testing & Results:

"Evaluation of Soldering and Washout in Heat Resistant Materials for Die Inserts"
In mid-2002, tests were conducted by Case Western Reserve University in Cleveland, Ohio on the "Evaluation of Soldering and Washout in Heat Resistant Materials for Die Inserts". The paper was written by John F. Wallace, David Schwam and Yulong Zhu and presented at the NADCA Die Materials Committee Meeting on June 11, 2002.

"Soldering Tendencies of Alternate Non-ferrous Die Materials"
In early 2000, tests were conducted by the Aluminum Casting Research Laboratory at Worcester Polytechnic Institute to compare the tendency of various die cast tools materials for soldering. "Soldering Tendencies of Alternate Non-ferrous Die Materials" written by Sumanth Ahankar and Diran Apelian was presented at the November 2000 NADCA® Meeting in Chicago, Illinois.

Anviloy® 1150 was found to have the last onset of soldering, lowest rate of attack and least "soldered" surface area of the five die materials evaluated.

These two charts summarize the data collected in that study:

Anviloy® Weld Rod

Anviloy® Weld Rod is used to weld Anviloy® 1150 to itself and to other ferrous materials and it's also used to repair dies.

How does it work?
Availability
Welding & Joining Guidelines
MSDS Sheets

How does it work?

Using MIG or TIG welding processes, Anviloy® Weld Rod is used to weld Anviloy® 1150 to itself or other materials and to also repair dies. Repairing dies allows you to extend the life of the die and get a larger return on your investment. Whether it's welding Anviloy® 1150 to itself or H-13 Tool Steel or repairing H-13 Tool Steel to H-13 Tool Steel, Anviloy® Weld Rod is the answer!

Please consult the Welding & Joining Guidelines for more information.

Availability:
Anviloy® Weld Rod is readily available in .120" dia. x 7" long. Request CMW® Part # 50-07644. It's also available in other diameters per request.

Diameter/ Length	Part Number	Lbs./Bar
.120 X 7"	50-07644	0.05

Thermkon® Materials

Availability & Types
Properties
Machining Guidelines
MSDS Sheets

Availability & Types:
Thermkon® materials are pressed into near net shape and sintered, not rolled into a sheet like other materials used as heat sinks. Typical sizes are 1" or 2" square x .25" thickness (or something similar). We normally manufacture a blank and the customer machines that blank into the specific dimension for the required part.

CMW currently produces six standard grades of Thermkon®, each with its own CTE (coefficient of thermal expansion). These, together with their measured nominal (20 °C) CTE values are listed below by increasing CTE:

Thermkon® 62 (6.1 ppm / °C at 20 °C)
Thermkon® 65M (6.5 ppm / °C at 20 °C)
Thermkon® 68 (6.7 ppm / °C at 20 °C)
Thermkon® 70M (7.2 ppm / °C at 20 °C)
Thermkon® 76 (7.6 ppm / °C at 20 °C)
Thermkon® 83 (8.5 ppm / °C at 20 °C)

Thermkon® materials can be engineered and produced with other nearby expansion values by altering the ratio of refractory to copper content when required.

Thermkon® materials are made by sintering pure refractory metal (either tungsten or molybdenum) to a controlled amount of interconnected porosity. This sintered "refractory sponge" is then infiltrated with molten copper, to create a bimetal composite which has the highest density and purity possible, ensuring MAXIMUM THERMAL CONDUCTIVITY for the specific ratio of combined metals.

Maximum control of properties is obtained when discrete parts are pressed in automated equipment. Size limitations for such pressing are:

0.080" [2 mm] minimum thickness
2.250" [5.7 cm] maximum plan dimension
0.375" [9.5 mm] minimum plan dimension
Parts thinner than 0.080" are manufactured by grinding and lapping from 0.080" which adds considerable cost. Parts of larger dimensions, and "bars" are also produced; but "manual" pressing is used, which roughly doubles the variability of the CTE and thermal conductivity from piece to piece.

Solder attachment to devices and substrates is facilitated by available gold plating which exceeds MIL-G-45204C for purity, thickness, hardness, and ease of soldering and brazing.

NO-CHAT® and NO-CHAT® Max

These materials have an inherently high mass and modulus of rigidity and these properties make it ideally suited as tool support material where less rigid and less massive materials will chatter or vibrate, thus the name NO-CHAT® and NO-CHAT® Max .

Actual Tests using an oscilloscope show the comparative tool vibration between No-Chat® and Steel when machining a 1% CrCu material, feed 0.008 IPR, and speed 375 FPM, cut 0.020 inches, Style C-8 Lathe Tools (using identical non-ferrous grade carbide tips).

As a result of High Thermal Conductivity (3 times that of steels) the material provides an additional benefit in allowing tools to run cooler, extending tool life.

Availability:
No-Chat® and No-Chat® Max materials are available in a line of rough shapes and finished products. Material is stocked in Rough Oversize to Finish (ROTF) round bars 3/16" to 1" dia. x 7" long and 1 ¼" x 12" long. Rectangular bars and finished products can be readily manufactured to your specifications.

Properties

Elkonite® 40W3 and Elkonite® 50W3

Elkonite® 40W3 and Elkonite® 50W3 have the highest tungsten content. Because of their very high density, excellent machinability, and totally non-magnetic nature Elkonite® 40W3 and Elkonite® 50W3 are often chosen for weights and high inertia components. Additionally, their great high temperature strength and cooling effect by copper evaporation have permitted their use in a variety of rocket nozzle and rocket vane applications involving hot gas erosion.

Properties

Machining Guidelines

Welding & Joining Guidelines

MSDS Sheets