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EN 1.3961 (GX3Ni36) Casting Alloy

EN 1.3961 alloy is an iron alloy formulated for controlled thermal expansion. Cited properties are appropriate for the quenched and tempered condition. 1.3961 is the EN numeric designation for this material. GX3Ni36 is the EN chemical designation.

The graph bars on the material properties cards below compare EN 1.3961 alloy to: low-expansion iron alloys (top), all iron alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.

Mechanical Properties

Elastic (Young's, Tensile) Modulus

190 GPa 27 x 10⁶ psi

Elongation at Break

31 %

Poisson's Ratio

0.3

Shear Modulus

72 GPa 10 x 10⁶ psi

Shear Strength

300 MPa 43 x 10³ psi

Tensile Strength: Ultimate (UTS)

450 MPa 65 x 10³ psi

Tensile Strength: Yield (Proof)

310 MPa 45 x 10³ psi

Thermal Properties

Latent Heat of Fusion

270 J/g

Melting Completion (Liquidus)

1430 °C 2610 °F

Melting Onset (Solidus)

1390 °C 2530 °F

Specific Heat Capacity

460 J/kg-K 0.11 BTU/lb-°F

Thermal Expansion

1.3 µm/m-K

Otherwise Unclassified Properties

Base Metal Price

25 % relative

Density

8.2 g/cm³ 510 lb/ft³

Embodied Carbon

4.8 kg CO₂/kg material

Embodied Energy

66 MJ/kg 28 x 10³ BTU/lb

Embodied Water

110 L/kg 14 gal/lb

Common Calculations

Resilience: Ultimate (Unit Rupture Work)

130 MJ/m³

Resilience: Unit (Modulus of Resilience)

250 kJ/m³

Stiffness to Weight: Axial

13 points

Stiffness to Weight: Bending

23 points

Strength to Weight: Axial

15 points

Strength to Weight: Bending

16 points

Thermal Shock Resistance

130 points

Alloy Composition

Iron (Fe)Fe		60.7 to 65
Nickel (Ni)Ni		35 to 37
Molybdenum (Mo)Mo		0 to 1.0
Manganese (Mn)Mn		0 to 0.5
Silicon (Si)Si		0 to 0.5
Chromium (Cr)Cr		0 to 0.25
Carbon (C)C		0 to 0.050
Phosphorus (P)P		0 to 0.030
Sulfur (S)S		0 to 0.020