Nickel Iron Alloy 48/ Nilo 48 (ASTM F30)

Technical Data Sheet

Chemical Composition Limits
Weight % Ni Cr Mn Si C Al P S Fe
Alloy 48 48 0.25 max 0.80 max 0.30 max 0.05 max 0.10 max 0.025 max 0.025 max Bal

Alloy 48 (Nilo 48) is a nickel-iron controlled-expansion alloy containing 48% nickel. Alloy 48 (Nilo 48 coefficient of thermal expansion matches that of soft lead and soda lime glasses therefore Alloy 48's main use is for glass to metal seals in soft lead or soda lime type glasses. Alloy 48 is also used for thermostats in industrial applications up to 450°C (840°F).

Typical Mechanical Properties

Material Ultimate Tensile Strength Yield Strength 0.2 % Elongation (%)
psi MPa psi MPa
Alloy 48 75,000 520 38,000 260 43

Coefficient of Expansion - Alloy 48 (Nilo 48)
68-212°F, 10ˉ6 in/in °F 4.7
20-100°C, μ m/m °C 8.5
68-752 °F, 10ˉ6 in/in °F 4.6 / 5.2
20-400°C, μ m/m °C 8.3 / 9.3

Alloy 48 is available in Round Bar, Tube, Sheet, Coil, Strip and Wire. For all stock availability contact Sales.

Alloy 48 Tube is available the following size ranges.
Outside Diameter - 0.25mm (0.010") up to 16.00mm (0.625")
Wall - 0.05mm (0.002") up to 1.00mm (0.040")
Straight Lengths - 1.00mm (0.040") up to 5000.00mm (197")
Coils Lengths - 5 Metres to 15 Metres
Standard Tolerance- OD &ID +/-0.03mm (0.0012")
Wall +/- 10%
Tight Tolerance - OD&ID +/- 0.015mm (0.0006")
Wall +/-3%
Some thin wall tubes up to 25.40 mm (1.000") can be supplied.

Alloy 48 Strip in Coil Alloy 48 Sheet Alloy 48 Plate
0.010" 0.010" 0.200"
0.015" 0.015" 0.235"
0.020" 0.020" 0.250"
0.040" 0.070" 0.375"
0.060" 0.080" 0.450"
  0.135" 0.500"
many other sizes available

UNS K94800
ASTM F30 Sheet, Strip, Rod, Bar, Tubing and Wire
DIN 17745
Werkstoff Nr.1.3922
Werkstoff Nr. 1.3926
Werkstoff Nr. 1.3927
AFNOR NF A54-301
Tradename Nilo Alloy 48

At Aircraft Materials all stock items can be shipped out within 24 hours, usually within the same day. Even cutting orders for bar or sheet can be processed and dispatched the same day, and for time-critical situations such as AOGs, we have a dedicated AOG service desk ready to help (

Thanks to our global logistics network we can source from anywhere in the world in just a few days. We use a range of transport partners to enable us to ship overnight within the U.K. and Europe and provide fast shipping solutions to the rest of the world. If your requirement is urgent we can offer a priority shipping service, but also if time is not so critical we can offer more cost-effective options to ensure you get the best value for money. To find out more about our services click here.

Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.

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