杭州优创 235铁铬铝丝 光亮 高质量的 耐高温电阻丝

1. introduction to products
with the characteristics of high resistance, low coefficient of electric resistance, high operating temperature, good corrosion resistance under high temperature, as well as the lower price, it iswidely used in industrial electric furnace, household electrical appliance and far infrared ray device.
2. marking
each spool/package of alloy is supplied with a label or tag showing alloy type, nominal size, tare and net weight, resistance w/m (w/ft), charge number and a reference number.
3. size
wires: 0.018-10mm ribbons: 0.05*0.2-2.0*6.0mm
strips: 0.5*5.0-5.0*250mm bars: d10-100mm
4. application
our products widely apply to chemical industry, metallurgy mechanism, glass industry, ceramic industry, home appliance area and so on.
c p s mn si cr ni al fe other
max max 0.60 22.5~24.5 max 0.60 4.2~5.0 bal. -
0.06 0.025 0.025 0.70
mechanical propertiesmax continuous service temp 1250ºc
resisivity at 20ºc 1.35 ohm mm2/m
density 7.25 g/cm3
thermal conductivity 60.2kj/m@h@ºc
coefficient of thermal expansion 15.0×10-6/ºc
melting point 1500ºc
tensile strength 637~784 mpa
elongation min 12%
section variation shrink rate 65~75%
repeatedly bend frequency min 5 times
continuous service time -
hardness 200-260hb
micrographic structure ferrite
magnetic property magnetic
temperature factor of electrical resistivity                                                                                                                                20ºc 100ºc 200ºc 300ºc  400ºc 500ºc 600ºc 700ºc 800ºc 900ºc 1000ºc 1100ºc 1200ºc
1 1.002  1.007  1.014  1.024 1.036  1.056  1.064  1.070  1.074  1.078  1.081 1.084
the allowable tolerance of alloy strip gb/t1234-2012
category thickness ( mm ) tolerance ( mm)
common precision high precision
cold-rolled strip 0.05 ~ 0.1 ±0.01 ±0.005
0.1 ~ 0.2 ±0.015 ±0.01
0.2 ~ 0.5 ±0.02 ±0.015
0.5 ~ 1.0 ±0.03 ±0.025
1.0 ~ 1.8 ±0.04 ±0.03
1.8 ~ 2.5 ±0.05 ±0.04
2.5 ~ 4.0 ±0.06 ±0.05
hot-rolled strip 2.5 ~ 5.0 ±0.25 ±0.2
5.0 ~ 7.0 ±0.3 ±0.25
7.0 ~ 10.0 ±0.4 ±0.35
10.0 ~ 20.0 ±0.5 ±0.45
the allowable tolerance of alloy strip gb/t1234-2012
category width ( mm ) tolerance ( mm )
side cut nonside cut
common precision high precision 
cold-rolled strip 5.0 ~ 10.0 ±0.2 ±0.1 -0.6
10.0 ~ 20.0 -0.8
20.0 ~ 30.0 -1
30.0 ~ 50.0 ±0.3 ±0.15 -1.2
50.0 ~ 100.0 ±1.0
100.0 ~ 200.0 ±0.5 ±0.25 ±1.5
200.0 ~ 300.0 ±1.8
hot-rolled strip 15.0 ~ 60.0 / ±1.5
60.0 ~ 200.0 ±2.5
200.0 ~ 300.0 ±3.0

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杭州优创金属材料有限公司
钟思佳
18268076521

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