Disposable Dental Steel Needles Dental Steel Screw All Metal Tips Needle

Type:	Dental Part
Advantage:	Longer Life
Feature:	High Hardness
Color:	as Picture
Product Name:	Dental Steel Needles
Material:	Steel

Customization:	Available \| Customized Request

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Shanghai Gongtao Ceramics Co., Ltd.

Manufacturer/Factory & Trading Company

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Shanghai, China

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The supplier has 5 foreign trading staff(s) and 5 staff(s) with over 6 years of overseas trading experience

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Product Description

Company Info.

Basic Info.

Model NO.

Transport Package

Wooden Box

Specification

Customer′s Drawing

Trademark

SHANGTAO

Origin

China

Product Description

Comparison Table of Ceramic Characteristics
		99 Alumina	95 Alumina	Steatite	Mullite	Cordierite	ZrO2
Main Components		99% A1203	95% A1203	MgO Si02	A1203 Si03	3Al2O3 2SiO2	ZrO2
Density	g/cm3	3.9	3.6	2.8	3	2.5	6
Water Absorption Rate	%	0	0	0	3	3	0
Sintering Temperature	ºC	1700	1680	1350	1300	1350	1600
Hardness	HV	1700	1500	800	1000	800	1300
Flexural Strength	Kgf/cm2	3500	300	900	1100	900	11000
Compressive Strength	Kgf/cm2	30000	25000	400	6000	3500	25000
Fracture Toughness	MPa.m1/2	4	3-4	-	-	-	-
Maximum Operating Temperature	ºC	1500	1450	1100	1000	1000	-
Thermal Expansion Coefficient 0-1000ºC	/ºC	8*10-6	8*10-6	6*10-6	6*10-6	4*10-6	9.5*10-6
Thermal Shock Resistance	T(ºC)	220	220	200	300	250	360
Thermal Conductivity	W/(m·K)	31.5	25	2.5	4.2	1.3	3
Thermal Conductivity	W/(m·K)	15.9	14	-	-	-	-
Volume Resistivity	Ω/cm2	-	-	-	-	-	-
20ºC		>1012	>1012	>1012	>1012	>1012	>1012
100ºC		1012-1013	1012-1013	1010-1011	1010-1012	107-108	-
300ºC		>1012	>1010	5*108	-	3*105	5*109
Insulation Failure Strength	KV/mm	18	18	10	10	10	-
Induced Constant	(E)	10	9.5	5.8	6	6	-
(100Mhz)	(E)	10	9.5	5.8	6	6	-
Induced Tangent	(tg6)	0.4*10-3	0.4*10-3	0.4*10-3	0.4*10-3	0.4*10-3	-