China Alloy Parts | Low & Controlled Expansion Alloys Supplier

Trusted Supplier of Specialty Alloys Since 2001

China Alloy Parts Ltd. is a globally recognised stockist of low and controlled expansion alloys, including Invar 36, Kovar, and Alloy 42. With a UK-based inventory of unrivalled size, we deliver high-quality, fully certified alloys to industries worldwide.

Accredited with the AS9120/ISO9001 Quality Management System since 2015, our team combines over 70 years of industry expertise to provide bespoke solutions for aerospace, defence, oil & gas, optical laser, and more.

70+

Years Combined Experience

2001

Established

AS9120

ISO9001 Certified

Our Specialty Alloy Range

We stock and supply a comprehensive range of low expansion and specialty alloys. All materials are professionally cut, profiled, and machined to specification — always on time.

Kovar

A nickel-iron-cobalt alloy designed for glass-to-metal sealing. Exhibits near-zero thermal expansion over a wide temperature range.

Composition: 29% Ni, 17% Co, Balance Fe
CTE: ~5.8 µm/m·°C (20–400°C)
Applications: Electronics, laser housings, vacuum tubes

Invar 36

FeNi36 alloy with near-zero thermal expansion. Ideal for precision instruments and cryogenic applications.

Composition: 36% Ni, Balance Fe
CTE: ≤1.3 µm/m·°C (20–100°C)
Applications: Metrology, aerospace, optical systems

Alloy 42

Low thermal expansion alloy suitable for glass and ceramic sealing in electronic packaging.

Composition: 42% Ni, Balance Fe
CTE: ~5.1 µm/m·°C (20–400°C)
Applications: IC packages, hermetic seals

Super Invar 32-5

Enhanced version of Invar with cobalt addition for even lower thermal expansion.

Composition: 32% Ni, 5% Co, Balance Fe
CTE: ~0.3 µm/m·°C (20–100°C)
Applications: Precision optics, satellite systems

OFHC Copper

Oxygen-Free High Conductivity copper, ideal for vacuum and high-purity environments.

Purity: >99.99% Cu
Conductivity: 100% IACS
Applications: Semiconductor, aerospace, cryogenics

Titanium

Lightweight, high-strength alloys available in grades 1–12. Excellent corrosion resistance.

Grades: 1, 2, 5 (Ti-6Al-4V), 9, 12
Applications: Aerospace, medical, marine
Forms: Bar, sheet, tube, custom machined parts

Inconel 625

Nickel-based superalloy with excellent strength and corrosion resistance at high temperatures.

Key Elements: Ni, Cr, Mo, Nb
Max Temp: ~1000°C
Applications: Jet engines, chemical processing

Molybdenum

High melting point (2623°C), excellent thermal conductivity, and low thermal expansion.

Purity: 99.95%+
Applications: Furnace components, electronics, aerospace
Forms: Rod, sheet, sputtering targets

The China Alloy Parts warehouse stocks a much wider range of alloys. Contact us if you don't see the alloy you're looking for.

Industries We Serve

Our specialty alloys are trusted across high-performance sectors requiring precision, durability, and reliability.

Aerospace

Precision components for satellites, engines, and avionics using Invar, Kovar, and Inconel.

Defence

High-reliability alloys for radar, missile systems, and secure communication devices.

Oil & Gas

Corrosion-resistant Inconel and titanium for downhole tools and offshore platforms.

Optical Laser

Low-expansion alloys for laser cavities, mirrors, and precision optical mounts.

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