Invar 42 Sheet Plate | UNS K94100 | DIN 1.3917

Invar 42 Sheet & Plate, UNS K94100 Invar 42 Sheets, ASTM F30 Invar 42 Plate, Invar Alloy 42 Sheet Supplier, Invar 42 Plate Manufacturer, Invar 42 Cold Rolled Sheet, Invar 42 Hot Rolled Plate, Invar 42 Precision Alloy Sheets, Invar 42 Coil Stock, Invar 42 Alloy Plates India.

PM Industries manufactures, supplies, and stocks UNS K94100 Invar 42 Sheet Plate in a range of thicknesses and sizes. Invar 42 is a nickel-iron alloy containing approximately 42% nickel, developed specifically for applications where controlled, predictable thermal expansion is the primary material requirement. Its coefficient of thermal expansion is significantly lower than standard structural metals and most engineering alloys, which is what makes it valuable in precision applications where dimensional stability across varying temperatures determines whether a system works correctly.

Invar 42 Sheet & Plate Manufacturer in Mumbai, Invar 42 Supplier in India, Invar 42 Stockist Mumbai, ASTM F30 Invar 42 Sheet Supplier India, UNS K94100 Plate Manufacturer Mumbai, Invar 42 Alloy Sheet Dealer India, Invar 42 Plate Supplier Mumbai, Nickel Iron Alloy 42 Sheet Manufacturer India, Invar 42 Plates Exporter Mumbai India.

Invar 42 is related to but distinct from Invar 36 (UNS K93600), which has the lowest thermal expansion of the iron-nickel series at approximately 36% nickel. Invar 42 has a slightly higher expansion coefficient than Invar 36, but it also has better strength and formability, making it more practical for applications that require both low expansion and structural performance. The choice between Invar 36 and Invar 42 depends on which property trade-off fits the specific design requirement.

Dimensional stability through temperature cycling is the entire reason Invar 42 gets specified. In precision assemblies where two or more materials are joined together, a mismatch in thermal expansion coefficients between the materials causes differential movement as temperature changes. That movement creates stress at the joint, causes optical misalignment in precision instruments, produces gap changes in seals and fits, and affects calibration in measurement equipment. By using Invar 42 for components where dimensional change must be minimized, designers can control that movement and reduce its effects on the overall system.

Glass-to-metal seals are a consistent application area for Invar 42. Electronic components sealed into glass or ceramic housings need a metal with a thermal expansion coefficient close to that of the glass, so differential expansion during temperature cycling doesn't crack the seal. Invar 42's expansion coefficient is matched to certain borosilicate glass compositions used in electronic packaging, making it the standard lead frame and seal ring material in those applications.

Shadow masks and precision electronics are another application driver. In cathode ray tube shadow masks and precision etched electronic components, the mask or component must maintain its hole pattern geometry accurately as the device heats during operation. Thermal expansion that displaces the hole pattern from the designed position degrades performance. Invar 42 holds its geometry through the operating temperature range closely enough to maintain acceptable pattern registration.

Aerospace structural applications use Invar 42 where composite structures need metal inserts, attachment fittings, or tooling with expansion characteristics close to the carbon fiber composite. Carbon fiber composites have very low thermal expansion in the fiber direction, and metal inserts with much higher expansion create thermal stress at the interface during service. Invar 42's low expansion reduces that mismatch and the associated interfacial stress.

Sheet and plate are available in a range of thicknesses and sizes with full material certification to ASTM F30 and applicable specifications. Contact PM Industries for thickness, width, length, and pricing.

Specification Invar 42 Alloy Sheet & Plate | UNS K94100 | DIN 1.3917

Specifications	ASME SA 240/ASTM A 240
Standard Sizes	1000 x 2000 mm, 1220 x 2440 mm, 1500 x 3000 mm, 2000 x 2000 mm, 2000 x 4000 mm
Width	10-2500mm
Length	2000mm, 2440mm, 3000mm, 5800mm, 6000mm, etc
Surface	2B, 2D, BA, NO.1, NO.4, NO.8, 8K, mirror, checkered, embossed, hairline, sand, blast, Brush, etching, etc
Thickness	0.1mm to 100 mm Thk
Hardness	Quarter Hard, Half Hard,Spring Hard, Soft, Hard
Stock available in form of	Shim Sheet, Rolls, Strip, Flats, Clad Plate, Plain Sheet, Plate, Sheet, Coils, Foils, Rolling Sheet, Rolling Plate, Flat Shim, Flat Sheet, Blank (Circle), soft annealed, sheared, annealed, tread plate,descaled, Checker Plate
Profiling	Plasma Plate Cutting
Value added services	Plasma cutting, Waterjet cutting, Laser cutting, welding, edge preparation, etc.
Test Certificates	EN 10204/3.1B, NACE MR0103, NACE MR0175
	Raw Materials Certificate
	100% Radiography Test Report
	Third Party Inspection Report, etc

Available Types of Invar 42 Sheet & Plate

Invar 42 Sheets & Plates – Chemical Composition

Grade	C	Mn	P	S	Si	Ni	Fe	Co	Cr	Mo	Cu
Invar 42	0.05 max	0.50 max	0.02 max	0.02 max	0.30 max	41.0 – 43.0	Bal	1.0 max	0.25 max	0.25 max	0.25 max

Invar 42 Sheet & Plate – Mechanical Properties

Grade	Condition	Tensile Strength (MPa)	Yield Strength (MPa)	Elongation (%)	Hardness (HRB)	Modulus of Elasticity (GPa)	Density (g/cm³)
Invar 42	Annealed	≥ 520	≥ 240	≥ 30	≤ 95	≈ 147	8.1

Invar 42 Sheet & Plate – Equivalent Grades

Grade	UNS	ASTM	Werkstoff (DIN)	EN	AFNOR	JIS	Trade Name
Invar 42	K94100	ASTM F30	1.3917	FeNi42	42 Ni Fe	FeNi42	Invar® 42