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Invar Alloy
Standard: ASTM F 1684
Grade: DIN 1.3912, UNS K93600
Shanghai Metal Corporation is a leading invar alloy manufacturer and supplier.
Invar alloy---National standard called expansion alloy, is a kind of nickel and iron that contains 36% of nickel,63.8% of iron and 0.2% of carbon, its low thermal expansion coefficient, can keep fixed length in wide temperature range.
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Alloy
1J33,3J01,3J9,4J29,4J32.4J33,Invar36,4J45.FeNi50.
Characteristic
Iron-nickel glass sealing alloys have certain lin-ear expansion coefficients within a certain range on temperature.
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-
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Soft glasses
Ceramics in the eletr-vacuum industry
Various instrumens components
Magnetic shunt compensatory element
Ring laser gyroscope
Standard part swing
Main Technical Paraments of Invar 36-Bar：
|
UNS |
W.Nr |
|
K93600 |
1.3912 |
Chemical composition
|
Grade |
% |
Ni |
Fe |
C |
Mn |
Si |
P |
S |
|
Invar 36 |
Min |
35 |
Bal. |
|
0.2 |
|
|
|
|
Max |
37 |
0.05 |
0.6 |
0.3 |
0.02 |
0.02 |
m value at 20°C)
|
Tensile Strength σb/MPa |
Yield Strength σp0.2/MPa |
Elongation σ5 /% |
|
490 |
240 |
42 |
The Average Linear Expansion Coefficient of Invar 36-Bar：
|
Alloy Grades |
Specimen heat treatment system |
The average linear expansion coefficient a,10-6/ ℃ |
|
|
20-100 ℃ |
20-300 ℃ |
||
|
Invar36 |
Will be semi-finished specimen heated to 840 ± 10 ℃, insulation 1h, water quenching, and then processed into finished specimen, at 315 ± 10 ℃, insulation 1h with the furnace cooling or air-cooled.. |
≤1.5 |
----- |
Alloy Typical Expansion Coefficient of Invar 36-Bar：
|
Alloy Grades |
The average linear expansion coefficient a,10-6/ ℃ |
|||||
|
20-50 ℃ |
20-100 ℃ |
20-20 ℃C |
20-300 ℃ |
20-400 ℃ |
20-500 ℃ |
|
|
Invar36 |
0.6 |
0.8 |
2.0 |
5.1 |
8.0 |
10.0 |
Q1.What is the MOQ and production lead time?
A:MOQ is 300kg. Standard orders take 25-35 working days; customized orders tak35-55 working days.
Q2.How long does sample preparation take?
A:3-7 working days. Samples are free for regular clients, shipping cost is on the buyer's account.
Q3.What information do you need for a custom quotation?
A:Material grade (e.g., Invar 36), dimensions (thickness/width/length), quantity, surface finish, and specific tolerance requirements.
Q4.What certifications are available?
A:ISO 9001, along with Mill Test Certificate (MTC) EN 10204 3.1 for chemical and mechanical properties.
Q5.What factors should I consider when choosing Invar alloy?
A:Operating temperature range, required coefficient of thermal expansion (CTE), magnetic permeability, and mechanical strength.
Q6.What is the difference between Invar 36 and standard carbon steel?
A:Invar 36 has a much lower CTE (~1.2×10⁻⁶/°C) compared to carbon steel (~12×10⁻⁶/°C), making it ideal for dimensional stability in precision applications.
Q7.Does heat treatment affect Invar alloy properties?
A:Yes. Improper annealing can increase thermal expansion. We supply stress-relieved material to ensure consistent low-expansion performance during machining.
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