Invar 36 Round Bar Supplier Mumbai for Precision and Low Thermal Expansion Applications

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In many engineering applications, even a small amount of dimensional change caused by temperature can affect the performance of a component.

This becomes particularly important in:

  • Precision instruments
  • Aerospace equipment
  • Optical systems
  • Scientific instruments
  • Cryogenic equipment
  • Composite tooling
  • Measurement systems

For such applications, engineers may require a material with a very low coefficient of thermal expansion.

This is where Invar 36 becomes important.

Invar 36 is a nickel-iron alloy known for its exceptionally low thermal expansion over a useful temperature range.

It is commonly identified as:

UNS K93600

Invar 36 Round Bar is used to manufacture precision components where dimensional stability is more important than simply achieving high strength.

For companies searching for an Invar 36 Round Bar Supplier Mumbai, the correct grade, specification, dimensions and required material condition should be clearly stated.


Table of Contents

  1. What is Invar 36 Round Bar?
  2. Why is Invar 36 used?
  3. Invar 36 material identification
  4. UNS K93600 Round Bar
  5. ASTM F1684 Invar 36
  6. Invar 36 chemical composition
  7. Invar 36 properties
  8. Invar 36 thermal expansion
  9. Invar 36 coefficient of thermal expansion
  10. Invar 36 dimensional stability
  11. Invar 36 mechanical properties
  12. Invar 36 tensile strength
  13. Invar 36 yield strength
  14. Invar 36 hardness
  15. Invar 36 precision applications
  16. Invar 36 aerospace applications
  17. Invar 36 optical applications
  18. Invar 36 cryogenic applications
  19. Invar 36 electronics applications
  20. Invar 36 composite tooling
  21. Invar 36 measurement equipment
  22. Invar 36 Round Bar specifications
  23. Invar 36 Round Bar sizes
  24. Invar 36 bright bar
  25. Invar 36 forged bar
  26. Invar 36 machining
  27. Invar 36 welding
  28. Invar 36 heat treatment
  29. Invar 36 surface finish
  30. Invar 36 engineering applications
  31. Invar 36 Round Bar price
  32. Invar 36 testing and certification
  33. How to buy Invar 36 Round Bar
  34. Invar 36 Round Bar Supplier in Mumbai
  35. Frequently Asked Questions
  36. Request a Quotation
  37. Conclusion

What is Invar 36 Round Bar?

Invar 36 Round Bar is a solid cylindrical product manufactured from Invar 36, a nickel-iron low-expansion alloy.

The material is primarily known for its exceptionally low thermal expansion.

Unlike conventional metals, Invar 36 undergoes relatively little dimensional change when temperature changes within its useful operating range.

This characteristic makes it valuable for precision applications.

Invar 36 Round Bar can be machined into:

  • Precision shafts
  • Pins
  • Instrument components
  • Measurement components
  • Tooling components
  • Optical equipment parts
  • Aerospace components
  • Scientific instrument components

Why is Invar 36 Used?

Temperature can cause ordinary metals to expand or contract.

For many everyday applications, this change is not significant.

However, in precision engineering, even a small dimensional variation can affect:

  • Alignment
  • Calibration
  • Measurement accuracy
  • Optical positioning
  • Tool dimensions
  • Component tolerances

Invar 36 helps minimize these changes.

Its principal advantage is therefore:

Low thermal expansion + dimensional stability

This makes it fundamentally different from alloys selected primarily for corrosion resistance or high strength.

For materials engineering information, engineers can refer to ASM International.


Invar 36 Material Identification

Invar 36 can appear under several different names during industrial procurement.

Common search terms include:

  • Invar 36
  • Invar-36
  • Invar Alloy 36
  • Invar 36 Alloy
  • Low Expansion Alloy 36
  • Nickel Iron Alloy 36
  • UNS K93600
  • Invar 36 Round Bar

When requesting a quotation, specifying both:

Invar 36 + UNS K93600

can help clearly identify the material.


UNS K93600 Round Bar

UNS K93600 is the Unified Numbering System designation associated with Invar 36.

Therefore, buyers searching for:

“UNS K93600 Round Bar Supplier”

are generally looking for Invar 36 material.

The UNS number should be accompanied by the applicable specification and product dimensions.


ASTM F1684 Invar 36

ASTM F1684 is associated with iron-nickel alloys having controlled thermal expansion characteristics.

It is relevant to certain Invar-type material requirements.

When a customer specifies ASTM F1684, the exact grade and product form should be confirmed before quotation.

For current standard information, refer to ASTM International.


Invar 36 Chemical Composition

Invar 36 is primarily a nickel-iron alloy.

Its characteristic properties are achieved through a carefully controlled alloy composition.

The principal elements include:

  • Nickel
  • Iron

Controlled quantities of other elements may also be present according to the applicable specification.

The exact chemical composition should always be checked against the relevant standard and Material Test Certificate.


Invar 36 Properties

The most important Invar 36 properties include:

  • Very low thermal expansion
  • Excellent dimensional stability
  • Good machinability with appropriate techniques
  • Useful mechanical strength
  • Good fabrication characteristics
  • Consistent performance in precision applications

The alloy’s primary purpose is not maximum tensile strength.

Its key advantage is dimensional stability when temperature changes.


Invar 36 Thermal Expansion

Thermal expansion refers to the change in dimensions that occurs when a material experiences a change in temperature.

Most metals expand significantly as temperature rises.

Invar 36 exhibits exceptionally low thermal expansion over a specified temperature range.

This characteristic makes it useful where dimensional accuracy must remain stable.


Invar 36 Coefficient of Thermal Expansion

The coefficient of thermal expansion, or CTE, is an important specification for Invar 36.

A low CTE means the material experiences relatively little dimensional change for a given temperature change.

For precision engineering, the CTE requirement should be considered alongside:

  • Operating temperature
  • Component dimensions
  • Required tolerance
  • Thermal cycling
  • Material condition

The applicable material standard should be used for exact CTE requirements.


Invar 36 Dimensional Stability

Dimensional stability is one of the main reasons engineers specify Invar 36.

Applications may involve components that must maintain:

  • Length
  • Diameter
  • Alignment
  • Flatness
  • Position
  • Calibration

when exposed to changing temperatures.

This makes Invar 36 useful in precision measurement and tooling applications.


Invar 36 Mechanical Properties

Although thermal expansion is the defining characteristic of Invar 36, its mechanical properties are also important.

These include:

  • Tensile strength
  • Yield strength
  • Elongation
  • Hardness
  • Fatigue behavior

The actual values depend on:

  • Product form
  • Material condition
  • Heat treatment
  • Manufacturing process

Certified material data should be used for engineering calculations.


Invar 36 Tensile Strength

Invar 36 provides useful tensile strength for precision components.

It is not normally selected simply because it has the highest possible strength.

Instead, engineers generally select it when:

dimensional stability is critical.

Potential applications include:

  • Precision shafts
  • Instrument components
  • Tooling
  • Aerospace structures
  • Optical components

Invar 36 Yield Strength

Yield strength indicates the stress at which permanent deformation begins.

For Invar 36 components, yield strength becomes important when the component experiences:

  • Mechanical loads
  • Clamping forces
  • Vibration
  • Thermal cycling
  • Structural stress

The required yield strength should be evaluated together with the dimensional stability requirements.


Invar 36 Hardness

Invar 36 hardness depends on:

  • Material condition
  • Cold working
  • Heat treatment
  • Manufacturing process

If a particular hardness range is required, it should be included in the purchase specification.


Invar 36 Precision Applications

Invar 36 is particularly valuable in precision engineering.

Potential applications include:

  • Precision instruments
  • Measurement systems
  • Optical assemblies
  • Scientific instruments
  • Dimensional standards
  • Precision tooling
  • Electronic equipment

Invar 36 Aerospace Applications

Aerospace applications can require components that remain dimensionally stable despite temperature changes.

Invar 36 may be considered for:

  • Aerospace tooling
  • Precision structures
  • Instrument components
  • Composite manufacturing tools
  • Specialized aerospace assemblies

For aerospace engineering standards and technical information, refer to SAE International.


Invar 36 Optical Applications

Optical systems can be highly sensitive to dimensional movement.

Temperature-induced expansion can affect:

  • Lens alignment
  • Mirror positioning
  • Optical spacing
  • Instrument calibration

Invar 36 can therefore be considered for selected optical and precision instrument components.


Invar 36 Cryogenic Applications

Invar alloys can be considered for selected low-temperature and cryogenic applications where controlled dimensional behavior is important.

Potential uses include:

  • Cryogenic equipment
  • Precision supports
  • Measurement equipment
  • Specialized instrumentation

The complete temperature range and mechanical requirements should be evaluated before selecting the material.


Invar 36 Electronics Applications

Electronic and precision assemblies may require materials with controlled thermal expansion.

Invar 36 can be considered for selected:

  • Electronic packaging
  • Precision frames
  • Instrument housings
  • Support structures
  • Dimensional-control components

Invar 36 Composite Tooling

Composite manufacturing can involve elevated-temperature processing.

Tooling materials must sometimes maintain accurate dimensions despite thermal cycling.

Invar 36 can be used for selected:

  • Composite moulds
  • Aerospace tooling
  • Forming tools
  • Lay-up tooling
  • Precision manufacturing fixtures

Its low thermal expansion can help maintain dimensional accuracy during controlled heating cycles.


Invar 36 Measurement Equipment

Measurement equipment requires dimensional stability.

Invar 36 can be considered for:

  • Precision gauges
  • Measurement fixtures
  • Instrument components
  • Calibration equipment
  • Scientific instruments

The objective is to minimize dimensional changes caused by temperature.


Invar 36 Round Bar Specifications

A professional purchase enquiry can include:

RequirementExample
MaterialInvar 36
UNSK93600
SpecificationASTM F1684
ProductRound Bar
Diameter50 mm
Length3000 mm
ConditionAs Required
FinishBright / Machined
Quantity100 kg
TestingChemical + Mechanical
CertificateEN 10204 3.1

For precision applications, include the required CTE or thermal-expansion requirement where applicable.


Invar 36 Round Bar Sizes

Invar 36 Round Bar may be required in different diameters depending on the application.

Typical enquiries may include:

  • 10 mm
  • 12 mm
  • 16 mm
  • 20 mm
  • 25 mm
  • 30 mm
  • 40 mm
  • 50 mm
  • 60 mm
  • 75 mm
  • 100 mm

Larger sizes can be required for tooling and specialized engineering applications.

Availability depends on:

  • Diameter
  • Length
  • Specification
  • Condition
  • Quantity
  • Stock

Invar 36 Bright Bar

Bright-finished Invar 36 Round Bar can be useful when:

  • Surface finish matters
  • Dimensional accuracy is important
  • Machining allowance must be controlled

Potential applications include:

  • Precision shafts
  • Instrument components
  • Pins
  • Tooling
  • Gauges

Invar 36 Forged Bar

Forged Invar 36 can be considered for larger components requiring controlled dimensions and suitable mechanical properties.

Potential applications include:

  • Large precision tooling
  • Specialized aerospace components
  • Industrial fixtures
  • Precision structures

The required forging and heat-treatment condition should be specified before ordering.


Invar 36 Machining

Invar 36 can be machined using suitable machining techniques.

Because precision applications often require tight dimensional tolerances, machining should consider:

  • Tool selection
  • Cutting speed
  • Feed rate
  • Coolant
  • Workholding
  • Thermal effects
  • Final dimensional inspection

For precision components, the machining sequence can be important because excessive heat during machining may influence dimensional measurements.


Invar 36 Welding

Invar 36 can be fabricated and welded using suitable procedures.

Important factors include:

  • Surface preparation
  • Welding procedure
  • Heat input
  • Filler material
  • Distortion control
  • Post-weld dimensional inspection

For precision structures, controlling weld distortion is particularly important.

Technical welding resources are available through TWI.


Invar 36 Heat Treatment

Heat treatment and thermal processing can influence the dimensional behavior and mechanical properties of Invar 36.

For precision applications, the specified thermal treatment should be followed carefully.

Important considerations include:

  • Heating rate
  • Holding temperature
  • Cooling method
  • Stress relief
  • Dimensional stability

The applicable material specification should determine the required treatment.


Invar 36 Surface Finish

Surface finish can be important for precision components.

Depending on the application, Invar 36 Round Bar may be required as:

  • Hot finished
  • Cold finished
  • Bright finished
  • Ground
  • Machined
  • Precision ground

The required finish should be included in the purchase enquiry.


Invar 36 Engineering Applications

Invar 36 is used in applications where thermal dimensional stability is important.

These can include:

  • Aerospace
  • Optical equipment
  • Scientific instruments
  • Composite tooling
  • Electronics
  • Precision measurement
  • Cryogenic equipment
  • Specialized industrial tooling

Invar 36 Round Bar Price

Invar 36 Round Bar Price depends on several factors.

Important pricing factors include:

  • Diameter
  • Length
  • Quantity
  • Specification
  • Material condition
  • Surface finish
  • Testing
  • Certification
  • Machining
  • Precision tolerance
  • Stock availability

Invar 36 is a specialty nickel-iron alloy, so its price can differ significantly from conventional stainless steel or carbon steel.

For an accurate quotation, provide the complete requirement.


Invar 36 Testing and Certification

Depending on the application, buyers may require:

  • Chemical analysis
  • Tensile testing
  • Yield testing
  • Elongation
  • Hardness
  • Thermal expansion testing
  • Dimensional inspection
  • Heat-number traceability
  • Material Test Certificate
  • Third-party inspection

For precision applications, thermal-expansion data can be particularly important.


How to Buy Invar 36 Round Bar

A professional purchase enquiry can include:

Material: Invar 36

UNS: K93600

Specification: ASTM F1684 / As Required

Product: Round Bar

Diameter: ______ mm

Length: ______ mm

Condition: ______

Finish: ______

CTE Requirement: ______

Quantity: ______ kg

Testing: ______

Certificate: ______

Application: ______

Providing these details allows the supplier to identify the correct material and prepare an accurate quotation.


Invar 36 Round Bar Supplier in Mumbai

If you are searching for an Invar 36 Round Bar Supplier Mumbai, specify the material using both its common name and UNS designation.

Instead of:

“Need Invar bar.”

provide:

Invar 36 / UNS K93600 / ASTM F1684 / 50 mm Diameter / 3000 mm Length

If the application is precision-critical, also mention the required thermal-expansion characteristics.

Manan Steel & Metals supplies specialty alloys, stainless steels and industrial metal products for engineering and manufacturing requirements.


Frequently Asked Questions

What is Invar 36 Round Bar?

Invar 36 Round Bar is a solid cylindrical product manufactured from a nickel-iron alloy known for very low thermal expansion.

What is the UNS number of Invar 36?

The commonly associated UNS designation is K93600.

What is Invar 36 used for?

Invar 36 is used for precision tooling, aerospace components, optical equipment, scientific instruments, measurement systems and applications requiring dimensional stability.

Why is Invar 36 called a low expansion alloy?

Because it exhibits exceptionally low thermal expansion over a specified temperature range compared with many conventional metals.

What is the coefficient of thermal expansion of Invar 36?

The coefficient depends on the temperature range and material condition. For exact requirements, the applicable specification and certified material data should be used.

Is Invar 36 suitable for aerospace applications?

Yes. It can be considered for selected aerospace tooling, precision structures and specialized components where dimensional stability is important.

Is Invar 36 suitable for composite tooling?

Yes. Invar 36 is used for selected composite tooling applications because its low thermal expansion can help maintain dimensional accuracy during controlled thermal cycles.

Can Invar 36 be machined?

Yes. Appropriate machining practices are important, particularly when tight dimensional tolerances are required.

Can Invar 36 be welded?

Yes. Suitable welding procedures can be used, with particular attention to distortion and dimensional control.

Is Invar 36 a stainless steel?

No. Invar 36 is primarily a nickel-iron low-expansion alloy.

What affects Invar 36 Round Bar price?

Diameter, length, quantity, specification, condition, finish, precision tolerance, testing, certification, machining and availability can affect the price.

Where can I buy Invar 36 Round Bar in Mumbai?

Contact Manan Steel & Metals with your required grade, specification, dimensions, quantity and thermal-expansion requirements.


Request an Invar 36 Round Bar Quotation

Looking for an Invar 36 Round Bar Supplier in Mumbai?

Send your complete requirement:

Material: Invar 36

UNS: K93600

Specification: ______

Diameter: ______ mm

Length: ______ mm

Quantity: ______ kg

Condition: ______

Finish: ______

CTE Requirement: ______

Testing: ______

Certificate: ______

Application: ______

Phone: 7977369869

Email: manansteel@gmail.com


Manan Steel & Metals

Shop No. 2, Hira Building
97 Khetwadi Main Road (Nanubhai Desai Road)
Girgaon, Mumbai – 400004
Maharashtra, India

Phone: 7977369869
Email: manansteel@gmail.com


Conclusion

Invar 36 is a specialized nickel-iron alloy selected primarily for its very low thermal expansion and dimensional stability.

Unlike materials chosen mainly for maximum strength or corrosion resistance, Invar 36 is particularly valuable when temperature-related dimensional changes need to be minimized.

It can be considered for:

  • Aerospace tooling
  • Composite manufacturing
  • Optical equipment
  • Scientific instruments
  • Precision measurement systems
  • Electronics
  • Cryogenic equipment
  • Specialized engineering components

For procurement, clearly specify:

Invar 36 + UNS K93600 + applicable specification + diameter + length + condition + required thermal-expansion characteristics.

Providing the complete specification helps the supplier understand whether the material is intended for general engineering or a precision application requiring controlled thermal-expansion performance.

For Invar 36 Round Bar requirements in Mumbai, contact Manan Steel & Metals with your complete technical requirement.