UGI® HT605 – High‑Temperature Cobalt‑Chromium‑Nickel‑Tungsten Alloy with Superior Oxidation Resistance

UGI® HT605 is a non-magnetic cobalt - chromium - nickel - tungsten alloy with high resistance to oxidation and corrosion, associated with high mechanical performance characteristics at high temperatures (up to 980°C). The high mechanical performance characteristics of this grade are obtained via work hardening and can be slightly increased via age hardening.

Properties

General

Property	Value
Density	9.13 g/cm³

Mechanical

Property	Temperature	Value	Comment
Elastic modulus	20 °C	225 GPa
	250 °C	214 GPa
	500 °C	188 GPa
Elongation		30 %
Tensile strength		860 MPa	min.

Thermal

Property	Value	Comment
Coefficient of thermal expansion	0.0000123 1/K	20 to 100°C
Melting point	1330.0 - 1410.0 °C
Thermal conductivity	9.4 W/(m·K)

Electrical

Property	Value
Electrical resistivity	8.800000000000001e-10 Ω·m

Chemical properties

Property	Value	Comment
Carbon	0.05 - 0.15 %
Chromium	19.0 - 21.0 %
Iron	3.0	max.
Manganese	1.0 - 2.0 %
Nickel	9.0 - 11.0 %
Phosphorus	0.04	max.
Silicon	0.4	max.
Sulfur	0.03	max.
Tungsten	14.0 - 16.0 %

Technological properties

Property

Application areas

Heart valves and vascular endoprosthesis (stents)

Endoscopic tubes and wire guides

Cerclage cables

Turbocompressor parts

Turbine blades

Springs

Solder wire for hardfacing

Corrosion properties

UGI® HT605 has excellent corrosion resistance at the high temperatures found in aircraft engines. Resistance to oxidation is good when maintained intermittently at up to 870°C and continuously at up to 1090°C. This grade is highly-resistant to flaking and oxidation under extreme conditions.

Medium	Resistance level
Acetic acid	Good
Sulphuric acid	Moderate
Seawater	Moderate
Humidity	Excellent
Salt spray (NaCl)	Excellent
Nitric acid	Good
Phosphoric acid	Moderate
Sodium hydroxide	Good

General machinability

HT605 alloy is machinable using conventional techniques. However, we recommend high-speed steel tools (M40 type) or carbide tools (C1, C2 or C3 type) used on rigid equipment.

HT605 alloy is more difficult to machine than austenitic stainless steels (302, 304, 321, and 347 types). Generally, we suggest reducing the feed rates, cutting speeds and pass depths.

Please contact our technical assistance team for further information.

Other

Available products:

Product	Form	Finish	Tolerance	Dimensions (mm)
Cold-rolled bar	Round	Drawn	ISO 9-10	⌀1.8-14
Cold-rolled bar	Round	Ground	ISO 6-7-8-9	⌀1.0-14
Drawn wire	Round	Bright		⌀0.2 -1.0
Drawn wire	Round	Matt		⌀1.0-14

Others on demand.

FA 7850 Aluminium Alloy Plate – High‑Strength Side Support, Header & Tube Plate UGI® HT286: Premium Annealed & Aged Austenitic Alloy for Cryogenic to 700°C Applications

Metal