Hastelloy® N

Aurico Alloys LLP supplies Hastelloy® N as sheet, plate and round bar, from Mumbai, India, with EN 10204 3.1 mill test certificates.

Hastelloy® N (UNS N10003) is a nickel–molybdenum–chromium alloy with molybdenum 15-18% and chromium held to just 6-8%. It was developed for molten fluoride salts, and the low chromium is exactly why: chromium is the element fluoride salts preferentially attack.

Key Properties

Chromium only 6-8%, deliberately low, with molybdenum 15-18%.
Molten fluoride salt service is the reason the grade exists; it is a narrow and specific application.
Iron to 5%, tungsten to 0.5%, carbon to 0.08%.
ASTM B434 / AMS 5607 for flat product; ASTM B573 / AMS 5771 for bar.

Applications

Molten fluoride salt systems and loops
High-temperature nuclear and research reactors
Concentrated solar thermal salt circuits

Available Forms

Equivalent Grades & Standards

Equivalent designations and physical constants for Hastelloy N
Property	Value
UNS number	N10003
Density	8.86 g/cm³
Melting range	1300-1400 °C
Thermal conductivity (200 °C)	13.1 W/m·°C
Coefficient of expansion (20-200 °C)	12.3 µm/m·°C
Electrical resistivity (20 °C)	120.5 µΩ·cm
Dynamic modulus of elasticity (20 °C)	219 GPa

Identifiers and physical constants for Hastelloy N. A dash means no such designation is published for this grade.

Specifications by Product Form

Hastelloy N (N10003) is supplied to a different standard in each form. Quote the one that matches the product you are ordering.

Product form	Specification
Plate, sheet and strip	ASTM B434 / AMS 5607
Rod and bar	ASTM B573 / AMS 5771
Fittings	ASTM B366