Precision iron-nickel alloy 42NHTY

Chemical composition

Al	Aluminum	0.5 — 1.0
Fe	Iron	Rest
Si	Silicon	0.5 — 0.8
Mn	Manganese	0.5 — 0.8
Ni	Nickel	41.5 — 43.5
S	Sulfur	<0.02
Ti	Titanium	2.4 — 3.0
C	Carbon	<0.05
P	Phosphorus	<0.02
Cr	Chromium	5.3 — 5.9

Domestic analogues

N41XT

H41XTA

42NHTUA

Analogs in the USA

902

NI-SPAN C-902

5223 D AMS

5225 D AMS

5221 D AMS

5223 E AMS

5221 AMS

5223 AMS

5225 AMS

NI-SPAN alloy C-902 Special Metals

N09902 UNS

K70640 UNS

for elastic sensitive elements operating at temperatures up to 100 degrees. C Technical requirements — according to GOST 10994−74 The alloy is also included in the following standards: Standard Name GOST 14117−85 Tape made of precision alloys for elastic elements. Technical conditions GOST 14118−85 Precision alloy wire for elastic elements. Technical conditions GOST 14119−85 Bars from precision alloys for elastic elements. Technical conditions

Classification

Country	Section	Category
Country	Section	Category
CIS, Russia, Ukraine	Precision alloys	With preset elastic properties

Chemical composition

Standard	Fe, %	Si, %	Mn, %	Cr, %	Ti, %	Ni, %	Al, %	P, %	C, %	S, %
Standard	Fe, %	Si, %	Mn, %	Cr, %	Ti, %	Ni, %	Al, %	P, %	C, %	S, %
GOST 10994-74	44.91–49.3	0.5–0.8	0.5–0.8	5.3–5.9	2.4–3	41.5–43.5	0.5–1	< 0.02	< 0.05	< 0.02

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Physical characteristics

Temperature, °C	$E\cdot 10^{9}$ , $MPa$	$\alpha\cdot 10^{6}$ , $K^{-1}$
Temperature, °C	$E\cdot 10^{9}$ , $MPa$	$\alpha\cdot 10^{6}$ , $K^{-1}$
20	182	9.5

Mechanical properties at 20 °C

Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$\epsilon_L$ , %	$\psi$ , %	Treatment
Rolling	Standard	Size, mm	Tension	Classifiers	$\sigma _{U}$ , $MPa$	$\sigma_{P}$ , $MPa$	$\epsilon_L$ , %	$\psi$ , %	Treatment
	GOST 10994-74				1180–1570
Round					980	635	8	25	Quenching and aging
Wire				cold-work, half-load	980
Wire				cold-work	1080
Tape				cold-work	830

Brinell hardness number

Rolling	Standard	Classifiers	Value, HBW
Rolling	Standard	Classifiers	Value, HBW
			320–350

Standards

Standard	Description
Standard	Description
GOST 10994-74

Description of chemical elements

Element	Units of measurement	Description
Element	Units of measurement	Description
Fe	%	Iron
Si	%	Silicon
Mn	%	Manganese
Cr	%	Chrome
Ti	%	Titan
Ni	%	Nickel
Al	%	Aluminium
P	%	Phosphorus
C	%	Carbon
S	%	Sulfur

Description of physical characteristics

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
$E\cdot 10^{9}$	$MPa$	Elastic modulus
$\alpha\cdot 10^{6}$	$K^{-1}$	Coefficient of thermal (linear) expansion (range 20°C–T)

Description of mechanical properties

Parameter	Units of measurement	Description
Parameter	Units of measurement	Description
$\sigma _{U}$	$MPa$	Ultimate tensile strength
$\sigma_{P}$	$MPa$	Proportionality limit
$\epsilon_L$	%	Elongation at break (longitudinal)
$\psi$	%	Reduction in cross section on fracture