Graphite Heating Elements for Vacuum Furnaces

Precision-machined graphite resistance heating elements to 2200°C. TOYO TANSO isostatic grades with full MTC. Qualified supplier to SECO/WARWICK — export to 16+ countries.

SECO/WARWICK

Qualified supplier

TOYO TANSO

Authorised partner

ISO 9001:2015

Certified

2–4 weeks

Standard lead time

Standard Technical Specifications

Material	Isostatic graphite — TOYO TANSO TTK-8, TTK-87, or equivalent
Max operating temp	2200°C in inert/vacuum atmosphere; 400°C in oxidising atmosphere
Density	1.78–1.85 g/cm³
Ash content	<100 ppm standard grade; <30 ppm high-purity grade; <10 ppm on request
Flexural strength	45–60 MPa
Electrical resistivity	10–15 μΩ·m
Thermal conductivity	80–120 W/m·K
CTE	4–5 × 10⁻⁶/K
Machining tolerance	±0.01 mm standard; ±0.005 mm on request with CMM verification
Shapes available	Rod, tube, plate, U-shape, W-shape, hairpin, meander, annular, custom
HS Code	6815.10

Product Variants

Standard Grade — TTK-8 or equivalent

General-purpose vacuum furnace heating element machined from TOYO TANSO TTK-8 or equivalent standard isostatic graphite. Suitable for vacuum hardening, brazing, sintering and atmosphere heat treatment furnaces. Available in tube, plate, U-shape and W-shape profiles. Custom geometry from DXF or STEP drawings.

Typical applications: Vacuum hardening, atmosphere brazing, sintering, CVD/CVI, standard vacuum furnace hot zones.

High-Purity Grade — TTK-87 / IG-110 or equivalent

Ultra-high-purity heating element with ash content below 30 ppm (TTK-87) or below 10 ppm (IG-110). For processes where metallic contamination from the heater element must be minimised. Supplied with full purity analysis certificate.

Typical applications: Semiconductor crystal growth (CZ/FZ), compound semiconductor sintering, precision brazing, high-purity materials research.

PVD Coating Chamber Elements

Graphite heating elements for physical vapour deposition (PVD) coating chambers. Ash content below 50 ppm. Pre-delivery vacuum clean and bake. Mounting interface machined to chamber specification. Low outgassing at operating temperature critical for coating quality.

Compatible systems: Hauzer, Oerlikon Balzers, Sulzer Metco, custom PVD equipment.

Small / Laboratory Scale Elements

Compact heating elements for small-chamber vacuum furnaces, laboratory tube furnaces, desktop sintering units and research equipment. Resistance value verified individually prior to shipment. Miniature rod, split-ring and custom geometries available. Tolerances to ±0.01 mm maintained on small cross-sections.

Typical applications: University and R&D labs, desktop sintering, small vacuum brazing furnaces, material testing equipment.

Industrial / Large-Chamber Elements

Large-format and multi-segment graphite heating elements for production-scale vacuum and atmosphere furnaces. Multi-segment assemblies with graphite bolt connections allow field replacement of sections. Resistance calculation and power density analysis available. Max individual element dimensions and assembly design from furnace specifications.

Typical applications: Commercial heat treatment, powder metallurgy sintering, large-scale CVD processing, ceramic firing.