42hxtio 3j53 Ni Span C902 Spring Permanent Magnetic Alloy
Precision Elastic Parts Material

Sheet Thickness:0.1mm~3.5mm

Plate Thickness:3.5mm~40.0mm
Bar Dia 5.0mm~Dia180.0mm

Pipe OD 120mm~8.0mm,ID 8.0~129mm

Wire Dia 0.1mm-Dia5.0mm

Products Application

They are usually used for making instruments, wireless elastic sense organs, bellows, diaphragms.

Description

A precipitation hardenable Nickel-Iron-Chromium alloy having outstanding controllable thermoelastic coefficient
characteristics and excellent oxidation resistance in high temperature atmospheres. The alloy can be processed
to have a constant modulus of elasticity at temperatures ranging from -45 to +65oC (-50 to +150oF).

Parameter
TABLE 1 Cross Reference

Contury Name 1 Name 2

Russia 42HXTΙΟ H42XT

USA Ni-Span c902 Elinvar

Germany Ni-Span C

UK Ni-Span C

Japan Sumispan-3 EL-3

TABLE 2 Chemical Requirement

Element Composition,%

C ≤ 0.05

Si≤ 0.80

P≤ 0.020

S≤ 0.020

Mn≤ 0.80

Ni≤ 41.5-43.0

Cr 5.20-5.80

TI 2.3-2.70

Al 0.5-0.8

FE remainder

Notes:

1.the shape and dimensions of the alloys are in compliance with YB/T5256-1993

TABLE 3 Physical Requirement

Property Target

Density 8.0

Modulus of Elasticity(E/Empa) 176500-191000

Shear eleasticity(G/MPa) 63500-73500

Vickers Hardness(HV) 350-450

Staturation induction density(B600/T) 0.7

Mean Coefficient of Linear Expansion20-100ºC(10^-6/K) 8.5

Resistivity p/(Ω°m) 1.1

TABLE 4 Yield Strengh(after the heat treatment)

Delivery State Thickness/mm Yield Stength/Mpa

Annealed 0.50-2.50 <685

Cold rolled 0.50-1.00 >885

TABLE 5 The temperature coefficient of the modulus of elasticity

Aging Temperature/ºC The temperature coefficient of the modulus of elasticityβE/(10^-6/ºC)(-6~+80ºC)

Cold Rolling Annealed

500 -38~15 +18~+12

550 -22~0 +10~+35

600 0~+20 +35~+55

650 0~+20 +42~+64

700 0~+20 +40~+60

750 -4~+16 +28~+50

TABLE 6 Mechanical property requirement

Shape Delivery State Thickness&Diameter/mm Tensile Strengthòb/MPa Elongationò(%)≥

Strip Annealed 0.20-0.50 <885 20
Wire Cold Drawn 0.20-3.0 >930