Chemical composition Element Weight percent Ni 41.00 nominal Fe Balance C 0.05 max Mn 0.40 nominal Si 0.20 nominal Carpenter Glass Sealing 42 type analysis for UNS K94100; nominal unless marked maximum. [4] Special Metals gives NILO 42 major elements as Ni 42 and Fe 58 nominal. These producer analyses are not a universal acceptance specification. Specify the supplier grade and sealing requirements. [2] Product specifications Product form Specification route Qualification Sheet strip ASTM B753 Thermostat component alloy route; confirm grade Rod bar ASTM F30 Withdrawn 2024; legacy sealing alloy specification Sheet strip ASTM F30 Withdrawn 2024; legacy sealing alloy specification Tubing ASTM F30 Withdrawn 2024; dimensions and tests by agreement Wire ASTM F30 Withdrawn 2024; legacy sealing alloy specification Manufacturer specification references are historical supply routes. A withdrawn standard can be invoked only with an agreed edition and requirements. [2, 11]

Mechanical properties Property Value Unit Tensile strength 490 MPa Yield strength at 0.2 percent offset 250 MPa Elongation over 50 mm 43 % Reduction of area 72 % Typical hot rolled and annealed NILO 42 bar at 20°C. [2]

Application areas Semiconductor lead frames Glass seals in electronic tubes and lamp components Thermostat rods and bimetal components

Chemical composition Element Weight percent Ni 41.00 nominal Fe Balance C 0.05 max Mn 0.40 nominal Si 0.20 nominal Carpenter Glass Sealing 42 type analysis for UNS K94100; nominal unless marked maximum. [4] Special Metals gives NILO 42 major elements as Ni 42 and Fe 58 nominal. These producer analyses are not a universal acceptance specification. Specify the supplier grade and sealing requirements. [2] Product specifications Product form Specification route Qualification Sheet strip ASTM B753 Thermostat component alloy route; confirm grade Rod bar ASTM F30 Withdrawn 2024; legacy sealing alloy specification Sheet strip ASTM F30 Withdrawn 2024; legacy sealing alloy specification Tubing ASTM F30 Withdrawn 2024; dimensions and tests by agreement Wire ASTM F30 Withdrawn 2024; legacy sealing alloy specification Manufacturer specification references are historical supply routes. A withdrawn standard can be invoked only with an agreed edition and requirements. [2, 11]

Mechanical properties Property Value Unit Tensile strength 490 MPa Yield strength at 0.2 percent offset 250 MPa Elongation over 50 mm 43 % Reduction of area 72 % Typical hot rolled and annealed NILO 42 bar at 20°C. [2]

Application areas Semiconductor lead frames Glass seals in electronic tubes and lamp components Thermostat rods and bimetal components

Invar 42/ UNS K94100

Grade: Invar 42/ UNS K94100/ Nilo 42

Sheet/Plate: 0.3mm-150mm

Strip/Foil: 0.02mm-16mm

Pipe: 6mm*0.5mm-1200mm*100mm

Bar: Ф6mm – Ф600mm

Wire: Ф0.01mm – Ф6mm

Others: Forged Rings, Flanges, Elbows, Tees, Reducers etc.

Standard: ASTM/ASME/AMS

Alloy 42 is an iron nickel controlled expansion alloy commonly marketed as Invar 42 or NILO 42. Approximately 42 percent nickel gives a low, relatively stable expansion rate over moderate temperatures. The alloy is widely used in electronic packaging and selected glass sealing assemblies. Glass compatibility, material condition and thermal processing must be specified carefully to obtain consistent sealing and dimensional performance.

Chemical composition

Element	Weight percent
Ni	41.00 nominal
Fe	Balance
C	0.05 max
Mn	0.40 nominal
Si	0.20 nominal

Carpenter Glass Sealing 42 type analysis for UNS K94100; nominal unless marked maximum. [4] Special Metals gives NILO 42 major elements as Ni 42 and Fe 58 nominal. These producer analyses are not a universal acceptance specification. Specify the supplier grade and sealing requirements. [2]

Product specifications

Product form	Specification route	Qualification
Sheet strip	ASTM B753	Thermostat component alloy route; confirm grade
Rod bar	ASTM F30	Withdrawn 2024; legacy sealing alloy specification
Sheet strip	ASTM F30	Withdrawn 2024; legacy sealing alloy specification
Tubing	ASTM F30	Withdrawn 2024; dimensions and tests by agreement
Wire	ASTM F30	Withdrawn 2024; legacy sealing alloy specification

Manufacturer specification references are historical supply routes. A withdrawn standard can be invoked only with an agreed edition and requirements. [2, 11]

Mechanical properties

Property	Value	Unit
Tensile strength	490	MPa
Yield strength at 0.2 percent offset	250	MPa
Elongation over 50 mm	43	%
Reduction of area	72	%

Typical hot rolled and annealed NILO 42 bar at 20°C. [2]

Application areas

Semiconductor lead frames
Glass seals in electronic tubes and lamp components
Thermostat rods and bimetal components

Introduction

Specification

Chemical composition

Element	Weight percent
Ni	41.00 nominal
Fe	Balance
C	0.05 max
Mn	0.40 nominal
Si	0.20 nominal

Product specifications

Product form	Specification route	Qualification
Sheet strip	ASTM B753	Thermostat component alloy route; confirm grade
Rod bar	ASTM F30	Withdrawn 2024; legacy sealing alloy specification
Sheet strip	ASTM F30	Withdrawn 2024; legacy sealing alloy specification
Tubing	ASTM F30	Withdrawn 2024; dimensions and tests by agreement
Wire	ASTM F30	Withdrawn 2024; legacy sealing alloy specification

Manufacturer specification references are historical supply routes. A withdrawn standard can be invoked only with an agreed edition and requirements. [2, 11]

Mechanical