聚甲醛均聚物,球体, Acetal, Homopolymer POMH, 1.59mm直径

材料 >> 聚合物材斘�/div>

品牌: Goodfellow
产地: 英国
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产品介绍

产品参数

Diameter[直径]	1.59mm
Quantity[数量]	50 Piece - 500 Piece
Sphericity[球面]	25μm
Type[类型]	Precision Sphere
Mechanical Properties(机械性能)
Coefficient of friction	0.20 - 0.35
Elongation at break ( % )	40.0 -75.0
Hardness - Rockwell	M94
Izod impact strength ( J m?? )	75.0 - - 130.0
Poisson's ratio	0.350
Tensile modulus ( GPa )	2.90 - 3.10
Tensile strength ( MPa )	70.00
Physical Properties(物理性质)
Density ( g cm?? )	1.420
Flammability	HB
Limiting oxygen index ( % )	15
Radiation resistance	Poor
Resistance to Ultra-violet	Poor
Water absorption - equilibrium ( % )	0.60 - 0.90
Water absorption - over 24 hours ( % )	0.250
Thermal Properties(热性能)
Coefficient of thermal expansion ( x10?? K?? )	122.000
Heat-deflection temperature - 0.45MPa ( C )	170
Heat-deflection temperature - 1.8MPa ( C )	135.0
Specific heat ( J K?? kg?? )	1500.0
Thermal conductivity ( W m?? K?? )	0.22 - 0.24 @23ℂ�/td>
Upper working temperature ( C )	80 - 120
Electrical Properties(电气特�?
Dielectric constant @1MHz	4
Dielectric strength ( kV mm?? )	20.0
Dissipation factor @ 1MHz	0.0050
Surface resistivity ( Ohm/sq )	10??
Volume resistivity ( Ohmcm )	10??
Chemical Resistance(耐化学�?
Acids - concentrated	Poor
Acids - dilute	Poor-Fair
Alcohols	Good-Fair
Alkalis	Poor
Aromatic hydrocarbons	Good
Greases and Oils	Good
Halogenated Hydrocarbons	Good-Poor
Halogens	Poor
Ketones	Good-Fair

其他参数

公差

直径		��5%