Top Grade 4J29 Kovar Precision Alloy Tube from China Manufacturer Affordable Price

Product Description

The 4J29 Kovar Precision Alloy Tube is a controlled-expansion alloy renowned for its low, stable thermal expansion coefficient (CTE: 4.7-5.1 × 10⁻⁶/K from 20-500°C), closely matching borosilicate glass and ceramics. This makes our top grade 4J29 Kovar Precision Alloy tube indispensable for hermetic sealing in vacuum tubes, transistors, and integrated circuits. Manufactured under ISO 9001 standards, each Kovar precision alloy tube undergoes rigorous vacuum induction melting and drawing processes to achieve seamless construction, uniform wall thickness, and surface finish (Ra ≤ 0.8μm).

Available in custom diameters from 1.0mm to 50mm OD and lengths up to 3000mm, our 4J29 Kovar tube supports high-temperature brazing up to 900°C without warping. As a leading China manufacturer of precision alloy tube, DLX Alloy ensures every batch meets ASTM F15 and GB/T 14992 specifications, with full traceability and non-destructive testing (ultrasonic, eddy current). At an affordable price starting from $25/kg, this 4J29 Kovar precision alloy tube delivers premium performance without compromising budget—perfect for R&D prototypes to large-scale production.

Why Choose DLX Alloy for Your 4J29 Kovar Precision Alloy Tube?

With over 20 years as a China manufacturer of precision alloy tube, we prioritize affordability without sacrificing quality. Our 4J29 Kovar tube undergoes 100% quality checks, backed by a satisfaction guarantee. Contact us today for a free quote—fast delivery and MOQ as low as 5kg!

chemical composition

Key Features

Our Factory Price 4J29 Kovar Precision Alloy Tube stands out due to its unique properties tailored for high-precision engineering:

• Superior Thermal Matching: Optimized CTE for zero-stress seals in glass-ceramic assemblies, reducing failure rates in 4J29 Kovar precision alloy tube applications.

• High Purity and Consistency: 99.5%+ purity with minimal impurities, ensuring excellent weldability and corrosion resistance in Kovar precision alloy tube.

• Precision Tolerances: Wall thickness ±0.02mm, straightness <0.5mm/m—ideal for automated assembly lines using top grade 4J29 Kovar tube.

• Custom Fabrication: Tailored annealing (bright or oxide) and plating options for enhanced solderability in precision alloy tube from China.

• Cost-Effective Quality: Affordable price with bulk discounts; fast delivery from our China warehouse.

• Eco-Friendly Production: RoHS compliant, recyclable alloy minimizing environmental impact in 4J29 Kovar precision alloy tube manufacturing.

Packaging and shipping

FAQ

What are your working hours and contact information? 

Monday to Saturday: 7:30 a.m. to 5:00 p.m. (Beijing Time, GMT+08:00). May 1st to 3rd are public holidays, as well as October 1st to 7th and the Lunar New Year holiday. If you have any questions, please email us during the holiday period. 

Do you offer free samples?

Yes, we can provide free samples for testing. The buyer is responsible for all the shipping costs. 

What are your payment terms?

Wire transfer, letter of credit, deposit, deposit, deposit, Western Union, Speedy Money, PayPal 

What is the delivery time?

Usually, the delivery time for samples is 7 days after the payment is confirmed.