SSC Invar 36 For Aerospace Composite Tooling and Dies

Nickel Alloy Plate

Sandmeyer Steel Company stocks SSC INVAR 36 nickel alloy plate in thicknesses from ¼ (6.3mm) through 4" (101.6mm). This dimensionally stable nickel alloy plate is available from stock in full plates or custom cut shapes.

Available thicknesses for SSC INVAR 36:

1/4"	3/8"	1/2"	5/8"	3/4"	1"	1 1/4"
6.3mm	9.5mm	12.7mm	15.9mm	19mm	25.4mm	31.8mm

1 1/2"	1 3/4"	2"	2 1/2"	3"	3 1/2"	4"
38.1mm	44.5mm	50.8mm	63.5mm	76.2mm	88.9mm	101.6mm

Sandmeyer Steel Company is stocking SSC INVAR 36 nickel alloy plate for applications in the aerospace composite tooling and die market. The alloy is used extensively in these demanding conditions where dimensional stability is essential.

Any Way You Want It!
At Sandmeyer Steel Company, we have over 100 pieces of Value Added Plate Processing equipment all under one roof. You can purchase any custom shape or configuration you require to maximize plate yields. We can cut patterns utilizing five-axis abrasive waterjet, bandsaw, or laser. Our state-of-the-art plasma cutting system enables us to supply high-definition or plasma beveled products. We can also offer Machincut rings and discs up to 124" (3150mm) OD. Send us your drawings for finished or near-net shape parts, or we'd be happy to sell you full-size plates. At Sandmeyer Steel Company, we work with the customer!

Specification Sheet Overview

for SSC INVAR 36 (UNS K93603,)
W. Nr. 1.3912
For Aerospace Composite Tooling and Dies

General Properties
Applications
Standards
Chemical Analysis
Physical Properties
Mechanical Properties

Download the SSC INVAR 36 Specification Document (PDF)

General Properties

Nickel-Iron Alloy with a Very Low Coefficient of Thermal Expansion from Cryogenic Temperatures to 400°F (200°C)

SSC INVAR 36 nickel alloy plate (UNS K93603) is an austenitic nickel-iron alloy containing 36% nickel. It has an extremely low coefficient of thermal expansion from -418°F (-250°C) to 392°F (200°C). The alloy has good fatigue and mechanical properties at cryogenic temperatures. It exhibits moderately high strength along with good ductility and toughness. These properties along with good fabrication characteristics make SSC INVAR 36 nickel alloy plate ideal for applications requiring precise dimensional stability.

SC INVAR 36 nickel alloy plate can be hot and cold worked, machined, and formed. Fabrication processes are similar to austenitic stainless steels. The alloy can be welded using filler wire with expansion rates similar to those of the base metal.

SSC INVAR 36 nickel alloy plate resists corrosion in dry atmospheres at room temperature. In humid or moist atmospheres, corrosion can occur in the form of rust.

Applications

SSC INVAR 36 nickel alloy plate is utilized extensively in other industrial applications where dimensional stability is essential.

Tooling and Dies for Aerospace Composite Tooling
- Thermoset Epoxy Systems
- Resin Transfer Molded Tools
Cryogenic Components and Piping
Laser Components
Liquified Natural Gas (LNG)Marine fixtures and fasteners
- Production and Storage Equipment
- LNG Tanker Membranes
Marine Components
Wind Turbines

Standards/Material Certifications

ASTM......................... F1684-06
BOEING..................... D-33028-2

Chemical Analysis


Nickel	36.00%	Chromium	0.25% max
Carbon	0.05% max	Manganese	0.60% max
Silicon	0.40% max	Cobalt	0.50% max
Phosphorus	0.015% max	Sulfur	0.015% max
Aluminum	0.10% max	Magnesium	0.10% max
Zirconium	0.10% max	Titanium	0.10% max
Iron	Balance

Physical Properties

Density

0.293 lbs/in³
8.11 g/cm³

Melting Point

2606°F
1430°C

Specific Heat

0.123 BTU/lb-°F
515 J/kg-°C

Typical Thermal Expansion of SSC INVAR 36

Temperature Range		Total Expansion	Mean Linear Coefficient
°C	°F	(10^-3)	(10^-6/°C)	(10^-6/°F)
-200 - 20	-328 - 68	-0.33	1.5	0.8
-100 - 20	-148 - 68	-0.16	1.3	0.7
20 - 100	68 - 212	0.12	1.5	0.8
20 - 150	68 - 302	0.26	2.0	1.1
20 - 200	68 - 392	0.47	2.6	1.4
20 - 250	68 - 482	0.80	3.5	1.9
20 - 300	68 - 572	1.54	5.5	3.1
20 - 350	68 - 662	2.37	7.2	4.0
20 - 400	68 - 752	3.19	8.4	4.7
20 - 450	68 - 842	4.01	9.3	5.2
20 - 500	68 - 932	4.85	10.1	5.6

Electrical Resistivity

Temperature		Microhm cm (ohm.circ mil/ft)
°C	°F	Microhm cm (ohm.circ mil/ft)
20	68	80 (481)
100	212	86 (517)
200	392	97 (583)
300	572	105 (632)
400	752	111 (668)
500	932	117 (704)
600	1112	121 (728)

Mechanical Properties

Typical Room Temperature Mechanical Properties, Mill Annealed

Temperature		Yield Strength 0.2% Offset		Tensile Strength		Elongation on 50 mm (2 inch) %	Reduction of Area %
°C	°F	(MPa)	psi	(MPa)	psi	Elongation on 50 mm (2 inch) %	Reduction of Area %
20	68	240	35.0	490	71.0	42	70

NOTE: The information and data in this product data sheet are accurate to the best of our knowledge and belief, but are intended for informational purposes only, and may be revised at any time without notice. Applications suggested for the materials are described only to help readers make their own evaluations and decisions, and are neither guarantees nor to be construed as express or implied warranties of suitability for these or other applications.

RA330® is a registered trademark of Rolled Alloys