Precious Metals - Wire, Rod & Ribbon
Precious Metals - Wire, Rod & Ribbon
Johnson Matthey produces many different precious metal wires and their alloys in a range of diameters to suit your needs. The purest grade wire is made to your specification in our modern factories in Royston near Cambridge in the UK, and at West Chester near Philadelphia in the USA. Wire is delivered in coils, straight lengths, cropped pins or on a wide range of reels. Precise hardnesses, tensile properties, elongations or resistances can be specified at the time of order if required.
Through our expertise in precious metal wire drawing techniques and diamond die maintenance, we are also able to tightly control the wire diameter (measured by resistance) and eliminate contamination (typical resistance tolerance at ultrafine wire sizes is +/- 3%). Laser micrometers are used to guarantee that wire diameters are reliably maintained. Our metallurgical expertise and fine-wire process controls ensure consistent metallic grain structure in all rod, wire and ribbon for reliable tensile strength and exceptional repeatability.
There are numerous alloys available with established production routes compiled by Johnson Matthey over many years. Our team of metallurgists can provide technical support and recommendations on the suitability of different precious metal wires for your application.
Wire Specifications Available Sizes
Diameters from 0.001" (0.0254mm) to 0.125" (3.175mm)
Cut lengths 0.02" (0.508mm) or greater
Tolerances in accordance with ASTM A-555
Wire Size Variations
(The above specifications are references not limits)
Standard Spool Types
NOTE: Customer-supplied spools can generally be handled on request
*JM internal nomenclature, not actual spool types
JM-Clad™ Wire
We also offer a wide range of JM-Clad™ wire, a metal-to-metal composite of two different materials. JM-Clad™ wire and ribbon are for applications where the physical and mechanical attributes of two or more different materials are necessary. Typical uses are where the outer material imparts strength while the core material provides conductivity, radiopacity or resiliency.
JM-Clad™ Wire
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Wire Specifications Available Sizes
Diameters from 0.001" (0.0254mm) to 0.125" (3.175mm)
Cut lengths 0.02" (0.508mm) or greater
Tolerances in accordance with ASTM A-555
Wire Size Variations
| Specific size (inches) | Variations (inches) Over... Under |
| Under .100 to .044 | .001 .001 |
| Under .044 to .033 inclusive | .0008 .0008 |
| Under .033 to .024 inclusive | .0005 .0005 |
| Under .024 to .012 inclusive | .0004 .0004 |
| Under .012 to .008 inclusive | .0003 .0003 |
| Under .008 to .0048 inclusive | .0002 .0001 |
| Under .0048 | .0001 .0001 |
Standard Spool Types
| Spool* | Flange Dia. | Barrel Dia. | Width | Arbor Hole |
| Type 1 | 3 1/2" | 1 1/2" | 2 3/16" | 2 1/8" |
| Shaw | 4 5/8" | 4" | 5/8" | 3/8" |
| Type 2 | 4 1/2" | 2 1/2" | 2 15/16" | 5/8" |
| White | 4 7/8" | 3" | 3 1/2" | 5/8" |
| Gauze | 2 1/2" | 1 3/4" | 3" | 5/8" |
| Hubbard | 11 2/4" | 8 1/4" | 3 9/16" | 2" |
| Type 3 | 6" | 2 1/4" | 3" | 5/8" |
| Little White | 2 1/4 | 1 3/4" | 1" | 5/8" |
*JM internal nomenclature, not actual spool types
JM-Clad™ Wire
We also offer a wide range of JM-Clad™ wire, a metal-to-metal composite of two different materials. JM-Clad™ wire and ribbon are for applications where the physical and mechanical attributes of two or more different materials are necessary. Typical uses are where the outer material imparts strength while the core material provides conductivity, radiopacity or resiliency.
JM-Clad™ Wire
| Core Materials | Tubing Materials |
| Silver | Nitinol |
| Gold | Platinum |
| Platinum | Platinum Iridium |
| Platinum Iririum | Tantalum |
| Nitinol | |
| Tantalum |
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| Magnified View of JM-Clad™ Wire |
