Sells Cold Rolled, Alloy steel, Billets & Blooms, Angles +8
Buys Slabs, Billets-Blooms, Cold Rolled, Hot Rolled +8
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Material made by bonding two different metals permanently together so that each does the job it is best at: a thermostatic strip that bends with temperature, a saw blade with high speed steel teeth on a tough spring-steel back, or a plate with corrosion-resistant metal on a strong steel base.
A bimetal is two metals joined over their whole surface, by rolling them together under heavy pressure (roll bonding), by explosion welding, by weld overlay, or — for saw blades — by electron-beam welding a narrow wire of tool steel to the edge of a strip. The bond is metallurgical, so the composite behaves as one piece.
Thermostatic bimetal is the classic form: a strip of a high-expansion alloy bonded to a low-expansion one (an iron-nickel alloy of the Invar type). When the strip heats, one side grows more than the other and it bends by a predictable amount, which opens a contact in a thermostat, a circuit breaker or a motor protector.
In steel trading the larger volumes are bimetal saw blades and clad products. A bimetal band saw or hacksaw blade has high speed steel teeth (M42 or similar) welded to a spring-steel backing, so the teeth stay hard while the band flexes round the wheels without breaking. Bimetal bearing strip carries an aluminium or copper-lead lining on a steel back. Clad plate — stainless, nickel alloy, copper or titanium on carbon steel — is covered on its own page.
In the GCC bimetal saw blades are a staple of steel service centres, fabrication shops and stockists; clad plate goes into the oil, gas, petrochemical and desalination industries. Both are imported.
| Region | Standard | What it covers |
|---|---|---|
| USA | ASTM B388 ASTM |
Thermostat metal sheet and strip |
| USA | ASTM A264 ASTM |
Stainless chromium-nickel steel-clad plate |
| USA | ASTM A263 ASTM |
Stainless chromium steel-clad plate |
| USA | ASTM A265 ASTM |
Nickel and nickel-base alloy-clad steel plate |
| International | ISO 4383 ISO |
Plain bearings — multilayer materials for thin-walled plain bearings |
Grade equivalents and the standards bodies: Steel grades & standards
Local Steel Mills · Steel Mills - Agents & Traders · China
Local Steel Mills · Steel Mills - Agents & Traders · Coil Service Center · Stockist - Distributor · Other Steel Users · Jeddah
Local Steel Mills · Steel Mills - Agents & Traders · Coil Service Center · Stockist - Distributor · Other Steel Users · Jeddah
Local Steel Mills · Steel Mills - Agents & Traders · Stockist - Distributor · Fabrication · Other Steel Users · Design - Engineering · Surface Treatment · Equipment & Software · Inspection & Certification · Transport & Warehousing · Lahore
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