Titanium Grade 7

Aurico Alloys LLP supplies Titanium Grade 7 (UNS R52400, W.Nr. 3.7235) as sheet, plate, foil and round bar, from Mumbai, India, with EN 10204 3.1 mill test certificates. Palladium-enhanced (Ti-0.15Pd), it is used in hydrochloric acid units, marine heat exchangers and desalination.

Key Properties

Palladium 0.12-0.25% on Grade 2's oxygen and iron limits — the most corrosion-resistant of the titanium grades.
Crevice corrosion and reducing acids — hydrochloric, sulphuric and phosphoric — where unalloyed titanium is attacked.
Grade 11 is the Grade 1 version, more formable and lower strength.
Grade 16 carries a leaner palladium addition at 0.04-0.08%, at lower cost.

Applications

Reducing acid process equipment
Chlorate and chlor-alkali cells
Hydrometallurgical autoclaves
Heat exchangers in aggressive brine

The palladium in Grade 7 lifts titanium’s room-temperature limit from about 7% to about 27% in hydrochloric acid and from about 5% to about 45% in sulphuric acid, TIMET finds. Those limits, and how they compare with the nickel alloys, are in our acid and alkali service guide.

Available Forms

Equivalent Grades & Standards

Equivalent designations and physical constants for Titanium Grade 7
Property	Value
UNS number	R52400
Werkstoff / EN number	3.7235
Density	4.51 g/cm³
Melting range	1650 °C
Modulus of elasticity	15 × 10⁶ psi
Beta transus	1635-1735 °F (ATI range for grades 1-4 7 11 12 and 16-18 (± 25 °F))
Thermal conductivity	13-10 Btu/ft·h·°F (ATI range for grades 1-4 7 11 12 and 16-18)
Coefficient of expansion (32-600 °F)	5.1 µin/in·°F

Identifiers and physical constants for Titanium Grade 7. A dash means no such designation is published for this grade.

Specifications by Product Form

Titanium Grade 7 (R52400) 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 B265
Rod and bar	ASTM B348
Wire	ASTM B863
Pipe and tube	ASTM B338 / B861
Fittings	ASTM B363