Hastelloy G-30

Aurico Alloys LLP supplies Hastelloy G-30 as sheet, plate, foil and round bar, from Mumbai, India, with EN 10204 3.1 mill test certificates.

Hastelloy® G-30 (UNS N06030, W.Nr. 2.4603) is a high-chromium alloy — 28-31.5% — with iron 13-17%, molybdenum 4-6% and copper 1.0-2.4%. The chromium is what makes it a phosphoric acid alloy: commercial wet-process phosphoric attacks lower-chromium grades, and the iron content keeps it affordable against the C series.

Key Properties

Chromium 28.0-31.5%, the highest in the family.
Iron 13-17%, which is what separates it in cost from the nickel-rich C grades.
Molybdenum 4.0-6.0% with copper 1.0-2.4% and tungsten 1.5-4.0%.
ASTM B582 for plate, sheet and strip; B581 for rod and bar.

Applications

Wet-process phosphoric acid plant
Nitric and mixed acid service
Sulphuric acid pickling
Fertiliser production equipment

G-30 is Haynes’ grade for wet-process phosphoric acid and strong oxidising solutions, and it runs out abruptly in hydrochloric acid: 0.01 mm/y in boiling 1% acid, 9.47 mm/y in boiling 2%. See where it fits in our acid and alkali service guide.

Available Forms

Equivalent Grades & Standards

Equivalent designations and physical constants for Hastelloy G-30
Property	Value
UNS number	N06030
Werkstoff / EN number	2.4603
EN designation	NiCr30FeMo
Density	8.22 g/cm³
Electrical resistivity	1.16 µΩ·m
Thermal conductivity	10 W/m·°C
Coefficient of expansion (30-100 °C)	12.8 µm/m·°C
Dynamic modulus of elasticity	202 GPa

Identifiers and physical constants for Hastelloy G-30. A dash means no such designation is published for this grade.

Specifications by Product Form

Hastelloy G-30 (N06030) 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 B582
Rod and bar	ASTM B581
Pipe and tube	ASTM B619 / B622
Fittings	ASTM B366