Manufacturer, Supplier & Exporter of Invar 36 Ferrule Fittings

Invar 36 Ferrule Fittings are specialized components designed from a low-expansion nickel-iron alloy known as Invar 36 (UNS K93600). These fittings are engineered for applications requiring extremely low thermal expansion and dimensional stability across a wide temperature range. Their ability to maintain precise alignment and integrity in sensitive instrumentation and cryogenic applications makes them indispensable in industries like aerospace, electronics, optics, and scientific instrumentation..

Riddhi Siddhi Impex is a renowned manufacturer and domestic supplier of Invar 36 Ferrule Fittings in India. With state-of-the-art manufacturing capabilities and adherence to global quality standards, the company offers a full range of ferrule fittings including single ferrule, double ferrule, elbows, tees, reducers, unions, and bulkhead configurations. These fittings are produced with tight tolerances and superior surface finish to ensure leak-proof and reliable connections.

The unique selling point of Invar 36 is its remarkably low coefficient of thermal expansion (approximately 1.2 × 10⁻⁶ /°C between -100°C to +200°C), which is significantly lower than that of other metals. This property makes Invar 36 Ferrule Fittings ideal for applications involving temperature fluctuations or precision alignment requirements, such as in cryogenic piping, LNG systems, scientific equipment, or aerospace fuel systems.

Riddhi Siddhi Impex supplies Invar 36 Ferrule Fittings across all major Indian cities, including Mumbai, Delhi, Bengaluru, Hyderabad, Chennai, Kolkata, Pune, Ahmedabad, Surat, and Vadodara, where there is substantial demand in sectors like research labs, nuclear power plants, aerospace organizations (ISRO/DRDO), and scientific instrumentation manufacturing..

In cities like Rajkot, Nagpur, Indore, Bhopal, Jaipur, Kanpur, Lucknow, and Agra, the use of high-precision and temperature-sensitive components is growing due to expanding industrial and scientific infrastructure. Riddhi Siddhi Impex has developed an efficient supply chain and logistical network to meet the custom fitting requirements in these cities with minimal lead time..

Invar 36 Ferrule Fittings – Specifications & Technical Details

Specifications

Property	Details
Material	Invar 36 (Nickel-Iron Low Expansion Alloy)
UNS Number	K93600
Size Range	1/8” OD to 2” OD
Form	Single Ferrule, Double Ferrule, Elbows, Tees, Unions, Bulkhead, Reducers
Applications	Cryogenics, Aerospace, Scientific Instruments, LNG Piping

Chemical Composition (%)

Element	Content (%)
Nickel (Ni)	35.0 – 37.0
Iron (Fe)	Balance
Carbon (C)	≤ 0.05
Silicon (Si)	≤ 0.3
Manganese (Mn)	≤ 0.6
Chromium (Cr)	≤ 0.25
Cobalt (Co)	≤ 0.5

Mechanical Properties

Property	Value	Unit
Density	8.1	g/cm³
Tensile Strength	515	MPa
Yield Strength	275	MPa
Elongation	35	%
Coefficient of Thermal Expansion	~1.2 × 10⁻⁶	/°C (from -100°C to +200°C)

Standard Dimension Chart (OD Based)

Tube OD (Inch)	Ferrule OD (mm)	Length (mm)	Wall Thickness (mm)
1/8"	6	10	1.0
1/4"	8	14	1.2
3/8"	10	16	1.5
1/2"	12	18	1.6
3/4"	16	22	2.0

Equivalent Grades & Standards

Standard	Equivalent
UNS	K93600
ASTM	F1684 / B753
AMS	AMS I230
W. Nr	1.3912

Other Ferrule Fitting Types

Type	Description
Single Ferrule	Basic leak-proof fitting with one compression ring
Double Ferrule	Front and back ferrules provide better grip and seal
Union / Tee / Elbow	Used for directional changes and multi-port piping
Bulkhead	For wall or panel-mount applications
Reducer	For connecting different OD pipes

The company also offers customized Invar 36 fittings in non-standard sizes or thread types based on customer drawings or special design needs. Backed by a team of experienced engineers and a commitment to material integrity, Riddhi Siddhi Impex ensures that each ferrule fitting meets stringent dimensional and metallurgical standards, making it a reliable domestic source for high-performance Invar solutions.

Frequently Asked Questions (FAQs)

Q1: What makes Invar 36 Ferrule Fittings special?

A1: Invar 36 fittings have an extremely low thermal expansion coefficient, making them ideal for cryogenics and precision assemblies.

Q2: Are these fittings corrosion-resistant?

A2: While Invar 36 has moderate corrosion resistance, it is mainly used for its stability in temperature-sensitive environments. Surface treatments can enhance corrosion resistance.

Q3: Do you supply to smaller cities or industrial zones?

A3: Yes, we supply Invar 36 Ferrule Fittings to all major Indian cities and industrial clusters, including remote and developing areas.

Q4: Can fittings be customized to non-standard dimensions?

A4: Absolutely. We manufacture Invar 36 fittings per your custom drawings, specifications, or special dimensional requirements.