Physical properties of steel Double Colored Plastic Handle,Craftsman Putty Knife,Chisel Putty Knife,Putty Knife Design Laizhou Chenke trading Co., Ltd. , https://www.chenkegroup.com
Physical properties of steel
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Name
Quantitative symbol
Unit symbol
Meaning
1. density
P
g/cm3
Density is the mass per unit volume of a substance.
2.
heat
Sex
can
(1) melting point
°C
Melting temperature when a metal material changes from a solid to a liquid
(2) specific heat capacity
c
J/(kg·K)
The mass of a substance of unit mass that is reduced by 1 ° C when the temperature or temperature is increased by 1 ° C.
(3) Thermal conductivity
×’
W/(m·K)
Per unit area allows for conduction of heat when the temperature decreases by 1 ° C per unit length along the direction of heat flow per unit time
(4) Linear expansion coefficient
aL
lO-6/K
The ratio of the length of the metal temperature increased by 1 ° C to the original length
3.
Electricity
Sex
can
(1) Resistivity
Ï
Ω·m
Is a parameter that indicates the electrical conductivity of an object. It is equal to the resistance between the ends of a wire that is 1 m long and has a cross-sectional area of ​​1 mm2. It can also be represented by the resistance between two parallel end faces of a unit cube.
(2) Temperature coefficient of resistance
AÏ
1/°C
The ratio of the change in the resistivity of the material to the original resistivity per temperature rise and fall of 1 ° C is called the temperature coefficient of resistance.
(3) Conductivity
k
S/m or %IACS
The reciprocal of resistivity is called conductivity. In terms of numerical value, it is equal to the current flowing through the unit area when the conductor maintains a unit potential gradient.
4.
Magnetic performance
(1) Magnetic permeability
μ
H/m
It is a performance index for measuring the difficulty of magnetization of a magnetic material, and it is a ratio of a magnetic induction intensity (B) and a magnetic field strength (H) in a magnetic material. Magnetic materials are generally divided into two categories: soft magnetic materials (very high μ values, up to tens of thousands) and hard magnetic materials (μ values ​​around 1).
(2) Magnetic induction
B
T
The magnetization process in the magnetic medium can be regarded as adding a new magnetic field equal to 4 лJ determined by the magnetization (J) to the original magnetic field strength (H), and thus the magnetic field B= in the magnetic medium. H+4лJ, called magnetic induction
(3) Magnetic field strength
H
A/m
A current is passed through the conductor, and a magnetic field is generated around it. The magnitude of the magnetic field acting on the original magnetic moment or current is a characterization of the magnetic field strength
(4) Coercivity
HÑ
A/m
After the sample is magnetized to saturation, due to hysteresis, to reduce the magnetic induction to zero, a certain negative magnetic field must be applied. See also coercivity.
(5) Iron loss
P
W/kg
Energy consumed by ferromagnetic materials due to hysteresis and eddy current effects under dynamic magnetization conditions