---
title: "Clad Metal Products | NN, Inc."
description: "NN, Inc. offers exceptional clad metal products with engineering support and quick quotes. Enhance your projects with us."
canonical: "https://www.nninc.com/clad-metal-products/"
last_updated: "2026-09-01T21:10:03+00:00"
---

# Polymet Clad Metal

## Polymet Collaboration Makes the Difference

NN Inc Polymetallurgical LLC (“Polymet”) clads coils of dissimilar metals together using roll bonding with extreme pressure and heat as needed to achieve optimal bond strength and integrity.

We provide custom clad metal overlays, inlays, edgelays, corelays, electrical contact tapes, thermostatic bimetals, conductive spring materials, shaped materials, and precious metal drawn wire.

We offer up-front engineering design assistance, quick quotes with competitive pricing, sample lots for qualification, exceptional quality, on-time delivery, and friendly customer service.

[Get Started](https://www.nninc.com/contact/) View Processes

Overlay material - Scalpels

Overlay material - Contact Buttons

Corelay material - Subway Tokens

Inlay material - Stampings

Double edgelays - Stampings

Inlay material - Stampings

01/03

## Clad Metal Applications

Since 1972, Polymet has provided specialty clad metal products for a wide range of customers, products, and applications for the Electrical, Industrial, Environmental, Telecommunications, Medical, Automotive, Musical Instruments, Aerospace and Defense Markets.

- Electrical Switches and Relays
- Electronic Heatsinks
- Electrical Connectors
- Electrical Circuit Breakers
- Electrical Power Control & Distribution
- Electrical Switches and Relays
- Environmental Controls
- Deep draw for pogo pin bodies
- Actuator Coils
- Indicator Coils
- Basement Ventilation
- Cauterizing scalpels
- Fuse Holders
- Heatsinks for electronics
- Microwave transmission
- Fret wire for string instruments
- Thermometers
- Thermostats
- Temperature Monitoring & Controls
- Wood Stove Controls

## CLAD METAL PRODUCTS & PROFILES

- Overlay Clads
- Inlay Clads
- Edgelay Clads
- Corelay clads
- Contact Tape
- Thermostat metal Strip
- Thermostat metal Coils
- Thermostat metal Assemblies
- Thermostat metal Stampings
- Conductive Spring Materials
- Thrulay welded materials
- Multi-gauge Strip
- Musical Instrument Fret Wire
- Shaped materials

01/03

## Contact Tape (Electrical)

Contact tapes are precision formed overlays designed to meet the requirements of high-speed, automatic welding equipment for the manufacture of electrical contact assemblies. By precisely controlling the thickness of the component materials, a composite material system can be designed that minimizes precious metal usage, maximizes conductivity, and provides a resistive backing for welding to form a contact assembly. Weld projections can be formed as rails, knurls, diamonds, waffles, t-shapes, and custom profiles. Contact tapes are typically traverse wound on plastic spools.

Polymet’s V-Slitting capabilities produce contact tapes with a width-to-thickness ratio as low as 2:1 while eliminating the burr-up, burr-down condition resulting from conventional slitting methods. After V-Slitting, the material is form rolled to provide a precise contact profile and to form a close tolerance rail or patterned backing to assure consistent weldability.

[Get Started](https://www.nninc.com/contact/)

## Precious Metal Wire

Polymet draws fine wire in gold alloys, silver alloys, and Palmet alloys. Chemical compositions are precisely controlled to meet the customer’s specification. Finished wire is produced to meet their specifications for elongation, minimum break load, and tensile strength.

Pure gold wire is available in regular strength or high strength versions for thermosonic and ultrasonic bonding applications. Popular sizes range from 0.0005” to 0.0020”diameters. Larger diameters are also available.

7091 (Pd, Pt, Ag) and 7075 (Pd, Pt, Au, Ag) Palmet alloys are available in wire diameters from 0.002” to 0.020” diameters.

[Get Started](https://www.nninc.com/contact/)

01/03

## THERMOSTAT METALS, COILS & ASSEMBLIES & STAMPINGS

Thermostat metal spiral and helix coils are formed in-house from our thermostat metal for a wide variety of customer applications including thermometers, gauges, heating, refrigeration, basement ventilation, and automotive where high rates of thermal deflection and mechanical force is required.

Made from 0.004” to 0.125” thick TM, coils are made with a wide range of inside and outside diameters along with inside and outside tab configurations to suit our customer’s performance and space requirements. We offer automatic, semi-automatic, and hand-wound coils depending on volume and shape requirements.

Assemblies are made by brazing, welding, staking, and crimping the components required to meet your specifications. We look forward to working with you to determine the optimal design and cost.

Cantilever, simple beam and U-Shapes convert temperature change to mechanical force and smooth controlled movement. Each configuration offers a specific movement. Polymet’s engineering team with work with you to develop the right TM composition and shape to obtain the desired performance over the temperature range expected.

[Get Started](https://www.nninc.com/contact/)

01/03

## Musical Fret Wire

Used by the world’s most renowned musical instrument makers, Polymet fret wire is specified in most models of high-quality string instruments. Most replacement frets in the marketplace are also made using Polymet fret wire.

Starting with the purest nickel-silver wire, Polymet’s fret wires are formed into the precise fret profile specified by our customer in a high precision, continuous, multiple step process to shape the fret wire to the proper surface quality, dimensional accuracy and aesthetic appearance. The wire is then wound into coils or cut-to-length to the customer’s specification.

[Get Started](https://www.nninc.com/contact/)

## How we bond PROCESS & CAPABILITIES

## CORE CAPABILITIES

Polymet clads long coils of dissimilar metals together using roll bonding with extreme pressure and heat
as needed to optimize bond strength and integrity.

To assure the best possible bond, our hot bond process is performed in a controlled atmosphere that
prevents oxidation or the introduction of impurities at the bond interface. Cold bonding is utilized for materials best clad without heat.

Finished thicknesses from 0.004” to 0.218”. Widths up to 4”. Longest coils in the market.

[Get Started](https://www.nninc.com/contact/)

### PROCESS TECHNOLOGIES

- · Controlled atmosphere hot bonding
- Cold bonding
- Precision rolling
- Strip cleaning
- Strip annealing
- High-speed milling & slitting
- Forming of Electrical Contact Tape
- Turks Head Fret Wire Forming
- Wire Drawing and Annealing of Precious Metals
- Coil winding – automated, spiral, helix, handwound
- Hot & Cold Temperature testing
- Welded assemblies
- Four-slide forming/li>

### VALUES & CERTIFICATIONS

- Documented process sheets travelers for every material or product.
- Raw material traceability and certifications.
- Cross-section testing in accordance with ASTM B487.
- Microhardness testing following ASTM B578 and ASTM E384 guidelines.
- Tensile and elongation testing.
- Metallurgical grain size analysis.
- Electrical resistivity testing of thermostat metals to ASTM B63.
- Flexivity testing for thermostat metals to ASTM B106.
- X-ray Fluorescence thickness testing.
- Eddy current testing
- Special functional testing per customer specifications.
- ISO 9001:2015 Certification.

## Contact Us and See What We Can Create Together

[Contact Us](https://www.nninc.com/contact/)

[![NN, Inc.](https://www.nninc.com/wp-content/themes/nninc/images/logo.svg)](https://www.nninc.com/)

## NN, Inc.

6210 Ardrey Kell Rd. Suite 120
Charlotte, NC 28277
[980-264-4300](tel:9802644300)

[View Locations](https://www.nninc.com/about/locations/)

### Solutions

- [Data Center Components](https://www.nninc.com/data-center-components/)
- [Military & Defense](https://www.nninc.com/military-defense/)
- [Medical](https://www.nninc.com/products/medical/)
- [Precision Fluid Management](https://www.nninc.com/products/precision-fluid-management/)
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- [Electric Vehicle Components](https://www.nninc.com/products/electric-vehicle-components/)
- [Precision Electrical Components](https://www.nninc.com/products/precision-electrical-components/)
- [Precision Manufactured Components](https://www.nninc.com/products/precision-manufactured-components-2/)

### Technologies

- [Clad Metal Products](https://www.nninc.com/clad-metal-products/)
- [Precision Machining](https://www.nninc.com/technologies/precision-machining/)
- [Precision Metal Forming](https://www.nninc.com/technologies/precision-metal-forming/)
- [Precious Metal Plating](https://www.nninc.com/plating/)
- [Assembly Capabilities](https://www.nninc.com/technologies/assembly-capabilities/)

### Company

- [Our Story](https://www.nninc.com/about/)
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