Cobalt L-605 Uns R30605 Alloy Steel Round Bar

• Type: Alloy Steel Bar
• Standard: AISI, ASTM, GB, JIS, DIN, BS
• Technique: Forged
• Application: Aerospace Industry,Medical Industry
• Surface Treatment: Polished
• Alloy: Alloy
• Model NO.: MD-126
• Special Use: Gas Turbine Engine Components
• Size: 10mm-30mm
• Length: 3m-10m
• Loading Port: Chinese Main Port
• Delivery Time: 15-20 Days Ex Mill
• Transport Package: Standard Sea-Worthy Package
• Specification: 10mm-30mm
• Trademark: Kingmetal
• Origin: China
• Production Capacity: 20000tons/Month

Product Description

Cobalt L-605 UNS R30605 alloy steel round bar

Cobalt L-605 (also known as alloy 25) is a cobalt-based superalloy with high levels of chromium and tungsten. It is characterized by outstanding high-temperature strength up to 1500 °F (1093 °C), excellent oxidation resistance at high temperatures up to 2000 °F (1093 °C) in corrosive environments, and superior resistance to sulfidation wear and galling. Cobalt L-605 has other less-known qualities like high ductility and biocompatibility. Cobalt L-605 is non-magnetic.

That said, like most other superalloys, Cobalt L-605 can lose its ductility when exposed to intermediate temperatures for more extended periods.

The strength of Cobalt L-605 is achieved thanks to solid-solution strengthening by tungsten in the first phase and strengthening with precipitated carbides in the second phase. Cobalt L-605 has very good forming characteristics and can be readily forged, hot-worked, or cold worked.

Thanks to all of its characteristics, Cobalt L-605 finds use in the aerospace industry. It is mainly used for manufacturing of gas turbine engine components, especially those that are often subjected to high heat. These include rings and blades for turbines, and combustion chamber parts (combustor liners).

Apart from the aerospace industry, Cobalt L-605 finds use in land-based gas turbines in power plants, and in industrial furnaces for muffles and liners in high-temperature kilns. Cobalt L-605 can also be used for manufacturing of high-temperature ball bearings and bearing races. This superalloy can also find a use for parts used in corrosive environments, mainly with wet chlorine, hydrochloric acid

Thanks to its biocompatibility, Cobalt L-605 can also be used in the medical industry, mainly for manufacturing of heart valves. That said, for these parts a special recrystallization process must be applied in order to control the grain size for a combination of strength and ductility.

 

Chemical Composition of Cobalt L-605

Element	Min (%)	Max (%)
Carbon, C	0.05	0.15
Manganese, Mn	-	≤ 2.00
Silicon, Si	-	≤ 0.40
Sulfur, S	-	≤ 0.015
Phosphorus, P	-	≤ 0.02
Chromium, Cr	19.0	21.0
Molybdenum, Mo	1.20	1.40
Iron, Fe	-	≤ 3.00
Tungsten, W	14.0	16.0
Nickel, Ni	9.0	11.0
Cobalt, Co	-	*Balance

Mechanical and Physical Properties

Property	Imperial	Metric
Density	0.335 lb/in3	9.27 g/cm3
Melting Range	2425 - 2570 °F	1330 - 1410 °C
Tensile Strength	154 ksi	1061 MPa
Tensile Strength, Yield 0.2%	75 ksi	517 MPa
Elongation in 2 inches (50 mm)	55 %	55 %
Elongation A5	25 %	25 %
Electrical Resistivity	34.9 µΩ in	88.6 µΩ cm
Magnetic Permeability at 200 oersteds	1.002	1.002
Thermal Conductivity	65 Btu⋅in/ft2 h °F	9.4 W/m K
Specific Heat	0.092 Btu/lb °F	385 J/kg °C
Coefficient of Thermal Expansion, RT - 200°F	6.8 × 10-6 in/in °F	12.3 µm/m °C
Resistance on air (up to the temperature listed)	1994 °F	1090 °C

Heat Treatment

High-temperature annealing is recommended to maintain the best properties of Cobalt L-605. Lower temperature annealing may cause carbide precipitation which is unwanted in superalloys such as Cobalt L-605. The most common annealing treatment is as follows:

• Annealing at 2150 °F to 2250 °F (1176 °C to 1232 °C)
• Rapid air cooling or water quenching

Select AMS Number:

AMS Number	Alloy	Type	UNS	Cross Ref. Spec	Misc./Shape
AMS 5537	L-605	Cobalt	R30605
AMS 5537 Foil	L-605	Cobalt	R30605	-	Foil
AMS 5537 Plate	L-605	Cobalt	R30605	-	Plate
AMS 5537 Sheet	L-605	Cobalt	R30605	-	Sheet
AMS 5537 Strip	L-605	Cobalt	R30605	-	Strip
AMS 5759	L-605	Cobalt	R30605
AMS 5759 Bar	L-605	Cobalt	R30605	-	Bar
AMS 5759 Custom Tube	L-605	Cobalt	R30605	-	Custom Tube
AMS 5759 Forging	L-605	Cobalt	R30605	-	Forging
AMS 5759 Ring	L-605	Cobalt	R30605	-	Ring
AMS 5796	L-605	Cobalt	R30605	-	Wire

Select ASTM Number:

ASTM Specification	Alloy	Type	UNS	Cross Ref. Spec
ASTM F1091-12	L-605	Cobalt	UNS R30605	AMS 5537, AMS 5759, AMS 5796
ASTM F90-14	L-605	Cobalt	UNS R30605	AMS 5537, AMS 5759, AMS 5796