Tungsten Wire: Sourcing, Types, and Applications in 2025
Tungsten wire is a critical material in industries ranging from electronics to aerospace due to its high melting point and durability. Whether you're a manufacturer or a buyer, understanding its properties and sourcing options is essential. This article provides actionable insights for 2025.
How to Find Reliable Tungsten Wire from China in 2025
China remains a top supplier of tungsten wire, but verifying quality is crucial. Here’s how to identify trustworthy manufacturers:
- Check certifications: Look for ISO 9001 or RoHS compliance.
- Request samples: Test tensile strength and purity (99.95% minimum).
- Review production capacity: Ensure they meet bulk order demands.
- Compare pricing: Average costs range from $50-$200/kg, depending on diameter and purity.
Platforms like Alibaba and Made-in-China list vetted suppliers, but always cross-check reviews.
What Buyers Should Know Before Buying Tungsten Wire from China
Key considerations include:
- Lead times: Typically 2-4 weeks for custom orders.
- Shipping logistics: Opt for suppliers offering DDP (Delivered Duty Paid) to avoid hidden fees.
- Payment terms: 30% deposit with balance paid after quality inspection.
Case Study: A German lighting manufacturer reduced costs by 20% by switching to a Jiangxi-based supplier with in-house R&D.
Types of Tungsten Wire
Common variants include:
- Pure Tungsten Wire: Used in high-temperature environments (e.g., furnace coils).
- Thoriated Tungsten Wire (1-2% ThO2): Enhances electron emission for welding electrodes.
- Lanthanated Tungsten Wire: A non-radioactive alternative for TIG welding.
- Doped Tungsten Wire: Contains potassium/silicon for improved creep resistance.
Functions and Features of Tungsten Wire
Notable properties:
- Melting point: 3,422°C (highest of all metals).
- Tensile strength: Up to 1,500 MPa.
- Low thermal expansion: Ideal for precision instruments.
Tip: For LED filaments, choose wires with a mirror-polished surface to maximize light reflection.
Scenarios of Tungsten Wire
Primary applications:
- Electronics: Heating elements in vacuum tubes.
- Aerospace: Components for rocket nozzles.
- Medical: Radiation shielding in X-ray machines.
- Jewelry: Durable rings and watch springs.
How to Choose Tungsten Wire
Follow this checklist:
- Define your application (e.g., welding vs. lighting).
- Select diameter (0.01mm-3.0mm) based on current load requirements.
- Prioritize suppliers with batch testing reports.
Example: A 0.5mm diameter wire supports up to 10A in halogen lamps.
Tungsten Wire Q & A
Q: What’s the difference between Grade A and Grade B tungsten wire?
A: Grade A has ≥99.95% purity, while Grade B (99.9%) is more cost-effective for non-critical uses.
Q: Can tungsten wire be recycled?
A: Yes, but requires specialized smelting due to its high melting point.
Q: How do I prevent oxidation during use?
A: Use inert gas environments (e.g., argon) for temperatures above 400°C.
Q: What’s the minimum order quantity (MOQ) from Chinese suppliers?
A: Typically 1kg for standard sizes; 10kg+ for custom alloys.
Q: Which diameter is best for jewelry making?
A: 0.2mm-0.5mm offers optimal flexibility and strength.
