Ni-Span-C 902 — datasheet, composition & supply

Precision alloys

Units

Tensile Rm

1310

MPa · ≥ std. min

Yield Rp0.2

1138

MPa · ≥ std. min

Elongation A

% · ≥ std. min

Service limit

200

°C · indicative max

Density

g/cm³

Chemical composition

Fe48%

Fe 48%Ni 42%Cr 5.3%Ti 2.5%Al 0.55%Minor & residual 1.9%

Nominal: mid-range where both limits are given, the cap where only a maximum is, balance takes the remainder. Exact specified ranges below.

	Element	Name	Content %
Main elements5 elements
	Fe	Iron	Bal.
	Ni	Nickel	41 – 43.5%
	Cr	Chromium	4.9 – 5.75%
	Ti	Titanium	2.2 – 2.75%
	Al	Aluminium	0.3 – 0.8%

	Element	Name	Content %
Minor & residual3 elements
	C	Carbon	≤ 0.06%
	Mn	Manganese	≤ 0.8%
	Si	Silicon	≤ 1%

Mechanical minima by form

Guaranteed values differ by form, size and delivery condition; quotations confirm the specification, form, size and condition.

Form	Condition	Rm MPa	Rp0.2 MPa	A ≥ %	Other requirements and notes
High-strength cold-rolled strip (0.51–6.35 mm thick)	Solution treated at 954 ± 14 °C, about 50% cold rolled and descaled, as supplied	≥ 862 (125 ksi)	—	≥ 3	Also specified: Hardness 24 HRC – 32 HRC
High-strength cold-rolled strip (0.51–6.35 mm thick)	As supplied, then precipitation aged at 704 ± 8 °C for 3 h, air cooled	≥ 1310 (190 ksi)	≥ 1138 (165 ksi)	≥ 5	Also specified: Hardness 39 HRC – 46 HRC

Where this grade is recommended

Matched in 1 service conditions; ranks and scores computed from the condition-scoring matrix.

Service condition	Industry	Temperature	Rank	Score
Metrology & precision structures	Semiconductor & Vac-Electronics	Controlled 20 °C	3 / 4	86

Designations & equivalents

Trade name(s)	Ni-Span-C 902 / Thermelast 4002
GOST (Russia)	≈ 42НХТЮ

Cross-references are common near-equivalents for search and shortlisting; substitution across standards requires clause-by-clause verification. All grades in one cross-reference table →

Applicable standards

Name the standard and its edition on the order.

SAE AMS5225 Ni-Span-C 902 50%N09902

Frequently asked questions

What is 3J53 Constant-Modulus Alloy (Ni-Span-C 902)?

3J53 Constant-Modulus Alloy (Ni-Span-C 902) — Precision alloys. Near-zero thermoelastic coefficient — resonators, frequency elements, precision springs

What is the maximum service temperature of 3J53?

Typically about 200 °C; the practical limit depends on media, stress and design life — acceptance per the governing standard.

What is the tensile strength of 3J53?

The specified minimum tensile strength is 1310 MPa for the main product form. Minima for other forms and sizes are listed under "Mechanical minima by form" on this page.

Which standards cover 3J53?

SAE AMS5225 Ni-Span-C 902 50%N09902

Where is 3J53 typically used?

Metrology & precision structures (Semiconductor & Vac-Electronics)

In which forms is 3J53 available?

Tube, plate, strip, bar, forgings, wire and other forms — sizes and delivery condition confirmed per order, with EN 10204 3.1 / 3.2 certification.

Same series

Hiperco 501J22 Ni-Fe 50 (1J50)Ni504-79 Permalloy1J79 Mumetal1J85 Elgiloy3J21 1.3981 · KovarNiCo29-18 · UNS K94610 Super Invar4J32 1.3912 · Invar 36FeNi36 · UNS K93600 1.3917 · Alloy 42FeNi42 · UNS K94100 ARMCO IronDT4C

Download PDF datasheet

This grade’s datasheet as an A4 PDF — for filing, printing or forwarding to colleagues.

Download PDF datasheet

Supply & enquiry

Tube & pipeφ1 – 219 × 0.25 – 25 mm

Plate4.76 – 80 mm

Barφ8 – 300 mm

Wire & filler metalsφ0.01 – 8 mm

For this grade we can supply, against your service conditions:

Tube, plate, strip, bar, forgings, wire and more — with size range and lead time
Chemistry and mechanical test report (EN 10204 3.1 / 3.2)
Like-for-like alternatives and selection advice
Applicable standards and inspection scope

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