Products Description

Alumina Threaded Rod is a fastener made from high-purity alumina ceramic. Alumina ceramic is a high-performance engineering ceramic renowned for its exceptional physical and chemical stability. This threaded rod is typically formed through precision machining and features standard thread structures, making it suitable for demanding environments that require high-temperature resistance, corrosion resistance, electrical insulation, or wear resistance. In industrial fields, it serves as a critical connection component, replacing metal threaded rods to address material limitations under specific operating conditions.

Alumina Threaded Rod

Product name	Alumina threaded rod
Material	ATZ , ZTA ,Alumina ,Zirconia ,AIN
Color	Customized according to the client's requirements
size	Customized according to the client's requirements
Machining accuracy	±0.001mm
Packaging	Carton /Pallet/Wooden case (According to client requirement )
Delivery time	Standard Product-Within 3 days
Items Design	According to the client's drawing or samples
Features	Good quality, low price, Multiple factories, deliver to you based on the one closest to your location
Application	Industrial Ceramics
Certificate	ISO, CE

Ceramics performance parameter

Number	Performance	Unit	Materials
			86-94.5 Porcelain	95 Porcelain	97 Porcelain	99 Porcelain	99 Porcelain	995 Porcelain	997 Porcelain	999 Porcelain
			Al2O3	Al2O3	Al2O3	Al2O3	Al2O3	Al2O3	Al2O3	Al2O3
1	Density	g/cm3	3.4-3.7	3.7	3.8~3.85	3.85	3.9	3.9	3.92	3.98
2	Flexural strength	MPa	250-330	304	320	340	450	370	400	550-600
3	Fracture toughness	MPa·m1/2	3.8	4	4.5	5.6-6	6.2	5.6-6	5.6-6	2.8-4.5
4	Dielectric constant	εr(20℃,1MHz)	8.5-9.0	9.0	9.2	9.5	9.5	9.7	9.8	9.9
5	Hardness	GPa	9.7-12	12.8-15	15	15-16			16.3	16.3-18
	Hardness	HRC	65.8-72	73-79	79	79-80			81	81-83
6	Volume resistivity	Ω·cm(20℃)	10 13	10 13	10 14	10 14	10 14	10 14	10 14	10 14
7	Elastic modulus	GPa	250-300	320	350	330	350	380	380	400
8	Coefficient of thermal expansion	×10-6/k	7-7.6	7.6	7.6	7.6	7.6	7.6	5.4-8.4	6.4-8.9
9	Compressive strength	MPa	1850	1910	2100	2210	2500	2300	2300	2300
10	Abrasions	g/cm2	0.2	0.2	0.1	0.1	0.1	0.1	0.1	0.1
11	Thermal conductivity	W/m×k(20℃)	15-20	20	24~27	34	38	35	35	38.9
12	Poisson's ratio	/	0.2	0.22	0.22	0.22	0.22	0.22	0.22	0.22
13	Insulation strength	kv/mm	20	27	28	28	28	28	30	30
14	Temperature	℃	1440-1600	1520-1600	1650	1650	1650	1650	1700	1700

Products Performance

Alumina Threaded Rod possesses several outstanding properties. In terms of mechanical performance, it exhibits extremely high hardness (Mohs hardness of 9), excellent wear resistance, but relatively low toughness and high brittleness. Therefore, installation requires avoiding impact or over-tightening. Regarding thermal performance, it offers outstanding high-temperature resistance with a melting point around 2050°C, allowing for long-term stable operation below 1600°C. It also has a low coefficient of thermal expansion and good thermal stability. Electrically, it is an excellent insulator with high dielectric strength, maintaining reliable insulation even under high temperatures or high frequencies. Chemically, it shows strong corrosion resistance, able to withstand most acids, alkalis, and organic solvents, and is not prone to aging or contaminating media. Additionally, it features low density, non-magnetic properties, and bio-inertia. However, its tensile strength and impact resistance are weaker compared to metals.

Product Application

Alumina Threaded Rod is widely used across multiple industrial sectors. In the electronics and electrical industry, it is used in semiconductor manufacturing equipment, circuit board supports, high-voltage insulators, etc., providing reliable electrical insulation and thermal stability. In high-temperature processing fields, such as metallurgical furnaces, heat treatment lines, and ceramic sintering equipment, it serves as a heat-resistant fastener, preventing the melting or deformation of metal components. In the chemical and pharmaceutical industries, it is employed in reactors, piping systems, and pump/valve connections to resist corrosive media. In scientific research instruments, it is applied in vacuum systems, laser devices, and optical platforms to meet requirements for high purity, low outgassing, and non-magnetic properties. Furthermore, in high-end fields such as medical equipment, food processing, and aerospace, it is also used for fastening and isolation in special environments. During use, it is important to pair it with ceramic nuts or washers and control the torque to prevent brittle fracture.