Cobalt Alloy 25/ Haynes © Alloy 25/ Udimet L605/ Alloy L-605

 

HAYNES 25 (L605, Stellite 25, UNS R30605)

Ni 10.0, Cr 20.0, Mn 1.5, C 0.33, Si 0.40, Fe 3.00, S 0.030, Co Bal., P 0.040, W 15.00

 

High Performance Alloys stocks and produces HAYNES 25 (L605) in this grade in the following forms: Bar, wire spools, wire cuts, sheet/plate, strip, tube. 

 

Nominal Chemistry

The major alloying elements are as follows: Cobalt 50%, Chromium 20%, Tungsten 15% and Nickel 10%.

 

Features

• Outstanding high temperature strength
• Oxidation resistant to 1800° F
• Galling resistant
• Resistant to marine environments, acids and body fluids

Applications

• Gas turbine engine combustion chambers and afterburners
• High temperature ball bearings and bearing races
• Springs
• Heart valves

Provide all grade of these alloy by different shape & size is Our expertise

For any inquiry & request, don't hesitate to contact us

 

Properties

HAYNES 25 (L605) is a non-magnetic cobalt based superalloy. HAYNES 25 (L605) maintains good strength upto 2150°F. AMS 5759 requires minimum yield strength of 45,000 psi at room temperature. HAYNES 25 (L605) maintains good oxidation resistance up to 1900° F. HAYNES 25 (L605) has a unique ability to resist corrosion in very severe environments. Highly resistant to hydrochloric acid, nitric acid and wet chlorine (subject to need for exercising care in its selection at certain con¬centrations and temperatures)

 

Hardenability

HAYNES 25 (L605) hardness is typically 250 BHN and never higher than 275 BHN by specification. Not significantly hardenable. Does not respond to customary aging treatments, but strain aging at relatively low temperatures (700-1100° F) can improve creep and rupture strength when the alloy is in service at temperatures under 1300° F. Also, tensile and creep strength can be improved by cold working. HAYNES 25 (L605) is an austenitic alloy.

 

Chemistry

Chemical Requirements
	Ni	Cr	Mn	Si	Fe	S	Co
Max	11.00	21.00	2.00	0.40	3.00	0.030	Bal
Min	9.00	19.00	1.00

 

Tensile Data

Mechanical Property Requirements
	Ultimate Tensile	Yield Strength (0.2% OS)	Elong. in 4D %	R/A	Hardness
Min	125 Ksi	45.0 KSi	30
Max
Min	862 Mpa	310 MPa
Max

 

 

Provide all grade of these alloy by different shape & size is Our expertise

For any inquiry & request, don't hesitate to contact us

 

Specifications

Form	Standard
Metal Type	UNS R30605
Bar	AMS 5759 ASTM F90 GE B50T26A
Cold Worked Bars	MCI 1031 GPS 2051
Wire
Sheet	AMS 5537
Plate	AMS 5537
Foil	AMS 5537
Fitting
Welding Tube	GE B50T26A
Forging	AMS 5759
Weld Wire	AMS 5759
Weld Electrode
Din	2.4964

 

 

Performance Profile

Alloy L605 is the strongest of the formable cobalt alloys, useful for continuous service to 1800°F. Because of long and widespread use, this alloy has been the subject of many investigations to determine its properties over a wide range of conditions, thus making it an unusually well characterized material. Alloy L-605 is also known as alloy 25.

When exposed for prolonged periods at intermediate temperatures, alloy L-605 exhibits a loss of room temperature ductility in much the same fashion as other super alloys, such as X or 625.

Alloy L-605 is welded using gas tungsten arc, gas metal arc, shielded metal arc, electron beam and resistance welding. Submerged arc welding is not recommended. Use good joint fit-up, minimum restraint, low inter-pass temperature and cool rapidly from welding. For maximum ductility fabricated components should be annealed 2150-2250°F, rapid cool.

 

Corrosion Resistance

HAYNES 25 (L605) resistance to high temperature oxidation and carburization is good. The alloy, while not primarily intended for aqueous corrosion, is also resistant to corrosion by acids such as hydrochloric and nitric acid, as well as being resistant to wet chlorine solutions.

Density: 0.330 lbs./cubic inch

 

Machinability

RATING: 15% of B-1112
TYPICAL STOCK REMOVAL RATE: 25 surface feet/minute with high speed tools, 70 surface feet/minute with carbide.

COMMENTS:
All customary machining operations are easily performed. M40 series high-speed tools are customarily used. M2 alloy and carbide tools have limited application and are not recom¬mended for end milling, drilling or tapping. Sulphur chlorinated, water-based cutting fluids work successfully when machining this alloy

 

Provide all grade of these alloy by different shape & size is Our expertise

For any inquiry & request, don't hesitate to contact us

 

COLD-WORKED PROPERTIES

Cobalt Alloy L605 has excellent strength and hardness characteristics in the cold-worked condition. These high property levels are also evident at elevated temperature, making Alloy L605 quite suitable for applications such as ball bearings and bearing races. A modest additional increase in hardness and strength can be achieved through aging of the cold-worked material.

TYPICAL TENSILE PROPERTIES, COLD-WORKED SHEET*
Cold Reduction	Test Temperature		Ultimate Tensile Strength		0.2% Yield Strength		Elongation In 2 in. (51mm) %
	°F	°C	Ksi	MPa	Ksi	MPa
10	70 1000 1200 1400 1600 1800	20 540 650 760 870 980	155 114 115 87 62 39	1070 785 795 600 425 270	105 78 80 67 47 27	725 540 550 460 325 185	41 48 37 8 13 15
15	70 1000 1200 1400 1600 1800	20 540 650 760 870 980	166 134 129 104 70 40	1145 925 890 715 485 275	124 107 111 86 52 30	855 740 765 595 360 205	30 29 15 5 9 5
20	70 1000 1200 1400 1800	20 540 650 760 980	183 156 137 107 41	1260 1075 945 740 285	141 133 120 96 30	970 915 825 660 205	19 18 2 3 4

*Limited data for cold-rolled 0.050-inch (1.3 mm) thick sheet

 

 

TYPICAL HARDNESS AT 70°F (20°C), COLD-WORKED AND AGED SHEET*
Cold-Work %	Hardness, Rockwell C, After Indicated Level of Cold Work and Subsequent Aging Treatment
	None	900°F(480°C) 5 Hours	1100°F (595°C) 5 Hours
None 5 10 15 20	24 31 37 40 44	25 33 39 44 44	25 31 39 43 47

*Limited data for cold-rolled 0.070-inch (1.8 mm) thick sheet.

 

 

TYPICAL TENSILE PROPETYPICAL TENSILE PROPERTIES, COLD-WORKED AND AGED SHEET*RTIES, COLD-WORKED SHEET*
Condition	Test Temperature		Ultimate Tensile Strength		0.2% Yield Strength		Elongation In 2 in. (51mm) %
	°F	°C	Ksi	MPa	Ksi	MPa
15% CW + Age A	70 1200	20 650	168 128	1160 885	136 104	940 715	31 23
20% CW + Age A	70 1000 1200 1400 1600 1800	20 540 650 760 870 980	181 151 144 108 74 43	1250 1040 995 745 510 295	152 129 128 97 59 33	1050 890 885 670 405 230	17 19 8 2 6 5
	70 600 1000 1200 1400 1600 1800	20 315 540 650 760 870 980	191 165 149 140 116 71 42	1315 1140 1025 965 800 490 290	162 132 124 119 92 50 31	1115 910 855 820 635 345 215	19 28 23 13 7 9 12

*Limited data for cold-rolled 0.050-inch (1.3 mm) thick sheet.
Age A = 700°F (370°C)/1 hour
Age B = 1100°F (595°C)/2 hours

 

 

IMPACT STRENGTH PROPERTIES, PLATE.
Test Temperature	Typical Charpy V-Notch Impact Resistance
°F(°C)	Ft.-lbs.	Joules
-321 (-196) -216 (-138) -108 (-78) -20 (-29) Room 500 (260) 1000 (540) 1200 (650) 1400 (760) 1600 (870) 1800 (980)	109 134 156 179 193 219 201 170 143 120 106	148 182 212 243 262 297 273 230 194 163 144

 

Provide all grade of these alloy by different shape & size is Our expertise

For any inquiry & request, don't hesitate to contact us

 

THERMAL STABILITY

When exposed for prolonged periods at intermediate temperatures, Cobalt Alloy L605 exhibits a loss of room temperature ductility in much the same fashion as some other solid-solution-strengthened super alloys, such as HASTELLOY® ALLOY X OR INCONEL® ALLOY 625. This behavior occurs as a consequence of the precipitation of deleterious phases. In the case of Alloy L605, the phase in question is CO₂W laves phase. HAYNES alloy 188 is significantly better in this regard than Alloy L605.

ROOM-TEMPERATURE PROPERTIES OF SHEET AFTER THERMAL EXPOSURE*
Exposure Temperature °F(°C)	Hours	Ultimate Tensile Strength		0.2% Yield Strength		Elongation %
		Ksi	MPa	Ksi	MPa
None	0	135.0	930	66.8	460	48.7
1200 (650)	500 1000 2500	123.6 140.0 130.7	850 965 900	70.3 92.3 95.1	485 635 655	39.2 24.8 12.0
1400 (760)	100	115.3	795	68.9	475	18.1
1600 (870)	100 500 1000	113.6 126.1 142.0	785 870 980	72.1 77.3 81.7	495 535 565	9.1 3.5 5.0

*Composite of multiple sheet lot tests.

 

 

TYPICAL PHYSICAL PROPERTIES
	Temp.,°F	British Units		Temp.,°C		metric Units
Density Melting Range	Room	0.330	lb/in3	Room	1.93	G/cm3
	2425-2570			1330-1410
Electrical Resistivity	Room 200 400 600 800 1000 1200 1400 1600 1800	34.9 35.9 37.6 38.5 39.1 40.4 41.8 42.3 40.6 37.7	µohm-in µohm-in µohm-in µohm-in µohm-in µohm-in µohm-in µohm-in µohm-in µohm-in	Room 100 200 300 400 500 600 700 800 900 1000	88.6 91.8 95.6 97.6 98.5 100.8 104.3 106.6 107.8 101.1 95.0	µohm-cm µohm-cm µohm-cm µohm-cm µohm-cm µohm-cm µohm-cm µohm-cm µohm-cm µohm-cm µohm-cm
Thermal Conductivity	Room 200 400 600 800 1000 1200 1400 1600 1800	65 75 90 105 120 135 150 165 182 200	BTU-in/ft2 hr-°F  BTU-in/ft2 hr-°F BTU-in/ft2 hr-°F  BTU-in/ft2 hr-°F  BTU-in/ft2 hr-°F  BTU-in/ft2 hr-°F  BTU-in/ft2 hr-°F  BTU-in/ft2 hr-°F  BTU-in/ft2 hr-°F  BTU-in/ft2 hr-°F	Room 100 200 300 400 500 600 700 800 900 1000	9.4 10.9 12.9 14.8 16.8 18.7 20.7 22.6 24.7 26.9 29.2	W/m-K W/m-K W/m-K W/m-K W/m-K W/m-K W/m-K W/m-K W/m-K W/m-K W/m-K

 

TYPICAL PHYSICAL PROPERTIES (continued)
	Temp., ° F	British Units	Temp., ° C	Metric Units
Mean Coefficient of Thermal Expansion	70-200 70-400 70-600 70-800 70-1000 70-1200 70-1400 70-1600 70-1800 70-2000	6.8 microinches/in- ° F 7.2 microinches/in- ° F 7.6 microinches/in- ° F 7.8 microinches/in- ° F 8.0 microinches/in- ° F 8.2 microinches/in- ° F 8.6 microinches/in- ° F 9.1 microinches/in- ° F 9.4 microinches/in- ° F 9.8 microinches/in- ° F	25-100 25-200 25-300 25-400 25-500 25-600 25-700 25-800 25-900 25-1000 25-1100	12.3 µm/m- ° C 12.9 µm/m- ° C 13.6 µm/m- ° C 14.0 µm/m- ° C 14.3 µm/m- ° C 14.6 µm/m- ° C 15.1 µm/m- ° C 15.8µm/m- ° C 16.5 µm/m- ° C 17.0 µm/m- ° C 17.6 µm/m- ° C

 

 

DYNAMIC MODULUS OF ELASTICITY
Temp., ° F	Dynamic Modulus of Elasticity,  10 6 psi	Temp., ° C	Dynamic Modulus of Elasticity, GPa
Room 200 400 600 800 1000 1200 1400 1600 1800	32.6 32.3 31.0 29.4 28.3 26.9 25.8 24.3 22.8 21.4	Room 100 200 300 400 500 600 700 800 900 1000	225 222 214 204 197 188 181 174 163 154 146

 

Provide all grade of these alloy by different shape & size is Our expertise

For any inquiry & request, don't hesitate to contact us

 

METAL-TO-METAL GALLING RESISTANCE

Cobalt Alloy L605 exhibits excellent resistance to metal galling. Wear results shown below were generated for standard matching material room-temperature pin on disc tests. Wear depths are given as a function of applied load. The results indicate that Alloy L605 is superior in galling resistance to many materials, and is surpassed only by ULTIMETTM alloy and HAYNES alloy 6B. Both of these materials were specifically designed to have excellent wear resistance.

	Room-Temperature Wear Depth For Various Applied Loads
	3,000 lbs. (1.365 Kg)		6,000 lbs. (2,725 Kg)		9,000 lbs. (4,090 Kg)
Material	mils	µm	mils	µm	mils	µm
alloy 6B	0.02	0.6	0.03	0.7	0.02	0.5
ULTIMET alloy	0.11	2.9	0.11	2.7	0.08	2.0
Alloy L605	0.23	5.9	0.17	4.2	0.17	4.2
Alloy 188	1.54	39.2	3.83	97.3	3.65	92.6
HR-160™ alloy	1.73	43.9	4.33	109.9	3.81	96.8
214™ alloy	2.32	59.0	3.96	100.5	5.55	141.0
556™ alloy	3.72	94.4	5.02	127.6	5.48	139.3
230™ alloy	4.44	112.7	7.71	195.8	8.48	215.5
HR-120™ alloy	6.15	156.2	7.05	179.0	10.01	254.2

 

HIGH-TEMPERATURE HARDNESS PROPERTIES

The following are results from standard vacuum furnace hot hardness tests. Values are given in originally measured DPC (Vickers) units and conversions to Rockwell C/B scale in parentheses.

 

	Vickers Diamond Pyramid Hardness (Rockwell C/B Hardness)
	70°F (20°C)	800°F (425°C)	1000°F (540°C)	1200°F (650°C)	1400°F ( 760°C)
Solution Treated	251 (RC22)	171 (RB87)	160 (RB83)	150 (RB80)	134 (RB74)
15% Cold Work	348 (RC22)	254 (RC23)	234 (RC97)	218 (RC95)	--
20% Cold Work	401 (RC35)	318 (RC32)	284 (RC27)	268 (RC25)	--
25% Cold Work	482 (RC48)	318 (RC32)	300 (RC30)	286 (RC28)	--

 

AQUEOUS CORROSION RESISTANCE

HAYNES 25 (L605) was not designed for resistance to corrosive aqueous media. Representative average corrosion data are given for comparison. For applications requiring corrosion resistance in aqueous environments, ULTIMET alloy and HASTELLOY® corrosion-resistant alloys should be considered.

	Average corrosion Rate, mils per year (mm per year)
	1% HCl (Boiling)	10% H2SO4 (Boiling)	65% HNO3(Boiling)
C-22™ alloy	3 (0.08)	12 (0.30)	134 (3.40)
Alloy L605	226 (5.74)	131 (3.33)	31 (0.79)
Type 316L	524 (13.31)	1868 (47.45)	9 (0.23)

 

Provide all grade of these alloy by different shape & size is Our expertise

For any inquiry & request, don't hesitate to contact us

 

OXIDATION RESISTANCE

Cobalt Alloy L605 exhibits good resistance to both air and combustion gas oxidizing environments, and can be used for long-term continuous exposure at temperatures up to 1800°F (980°C). For exposures of short duration, Alloy L605 can be used at higher temperatures.

	COMPARATIVE BURNER RIG OXIDATION RESISTANCE 1000-HOUR EXPOSURE AT 1800°F (980°C)
	Metal Loss		Average Metal Affected		Maximum Metal Affected
Material	mils	µm	mils	µm	mils	µm
230 alloy	0.8	20	2.8	71	3.5	89
HAYNES alloy 188	1.1	28	3.5	89	4.2	107
HASTELLOY® alloy X	2.7	69	5.6	142	6.4	153
Alloy 625	4.9	124	7.1	180	7.6	193
Alloy L605	6.2	157	8.3	211	8.7	221
Alloy 617	2.7	69	9.8	249	10.7	272
Alloy 800H	12.3	312	14.5	368	15.3	389
Type 310 Stainless Steel	13.7	348	16.2	411	16.5	419
Alloy 600	12.3	312	14.4	366	17.8	452

 

Oxidation Test Parameters

Burner rig oxidation tests were conducted by exposing samples 3/8 in. x 2.5 in. x thickness (9 mm x 64 mm x thickness), in a rotating holder, to products of combustion of No. 2 fuel oil burned at a ratio of air to fuel of about 50:1. (Gas velocity was about 0.3 mach). Samples were automatically removed from the gas stream every 30 minutes and fan-cooled to near ambient temperature and then reinserted into the flame tunnel.

	COMPARATIVE OXIDATION RESISTANCE IN FLOWING AIR*
	1800°F (980°C)		2000°F (1095°C)		2100°F (1150°C)
Material	mils	µm	mils	µm	mils	µm
HAYNES alloy 188	0.6	15	1.3	33	8.0	203
230 Alloy	0.7	18	1.3	33	3.4	86
Alloy L605	0.7	18	10.2	259	19.2	488
Alloy 625	0.7	18	4.8	122	18.2	462
Alloy X	0.9	23	2.7	69	5.8	147
Alloy 617	1.3	33	1.8	46	3.4	86

*Flowing air at a velocity of 7.0 ft./min. (213.4 cm/min.) past the samples. Samples cycled to room temperature once a week. 
**Metal Loss + Average Internal Penetration.

 

Provide all grade of these alloy by different shape & size is Our expertise

For any inquiry & request, don't hesitate to contact us

 

Machining

  

The alloys described here work harden rapidly during machining and require more power to cut than do the plain carbon steels. The metal is ‘gummy,’ with chips that tend to be stringy and tough. Machine tools should be rigid and used to no more than 75% of their rated capacity. Both work piece and tool should be held rigidly; tool overhang should be minimized. Rigidity is particularly important when machining titanium, as titanium has a much lower modulus of elasticity than either steel or nickel alloys. Slender work pieces of titanium tend to deflect under tool pressures causing chatter, tool rubbing and tolerance problems.
Make sure that tools are always sharp. Change to sharpened tools at regular intervals rather than out of necessity. Titanium chips in particular tend to gall and weld to the tool cutting edges, speeding up tool wear and failure. Remember- cutting edges, particularly throw-away inserts, are expendable. Don't trade dollars in machine time for pennies in tool cost.

Feed rate should be high enough to ensure that the tool cutting edge is getting under the previous cut thus avoiding work-hardened zones. Slow speeds are generally required with heavy cuts. Sulfur chlorinated petroleum oil lubricants are suggested for all alloys but titanium. Such lubricants may be thinned with paraffin oil for finish cuts at higher speeds. The tool should not ride on the work piece as this will work harden the material and result in early tool dulling or breakage. Use an air jet directed on the tool when dry cutting, to significantly increase tool life.

Lubricants or cutting fluids for titanium should be carefully selected. Do not use fluids containing chlorine or other halogens (fluorine, bromine or iodine), in order to avoid risk of corrosion problems. The following speeds are for single point turning operations using high speed steel tools. This information is provided as a guide to relative machinability, higher speeds are used with carbide tooling.

Material	Speed Surface ft/mm	Speed %B1112
AISI B1112	165	100
Rne 41	12	7
25 (L-605)	15	9
188	15	9
N-155	20	12
Waspaloy	20	12
718	20	12
825	20	12
X	20	12
RA333	20-25	12-15
A-286	30	18
RA330	30-45	18-27
HR-120TM	30-50	18-30
Ti 6A1-4V - soln annealed - aged	30-40 15-45	18-30 9-27
RA 353 MA~	40-60	25-35
20Cb-3~	65	40
AL6xN~	65	40
RA309	70	42
RA310	70	42
304	75	45
321	75	45
446	75	45
Greek Ascoloy Annealed	90	55
Hardened Rc35	50	30
303	100	60
416	145	88
17-4 PH - soln treated - aged Hi 025	75 60	45 36

 

 

Availability:
L605 Plate	L605 Fittings	L605 Tube / Pipe
L605 Bar	L605 Sheet	L605 Coil /Strap
L605 Fasteners / Flanges	L605 Powder	L605 Welding Product

Specifications
UNS R30605
AMS 5507 Sheet Strip and Plate 
AMS 5759 Bar and Forging Stock
AMS 5796 Welding Wire
AMS 5797 (UNS W73605) Welding Rod
ASTM F90 Bar and Wire (surgical implant quality)
GE B50T26
GE B50A460 
Tradenames: Udimet Alloy L-605, Haynes 25, Nickelvac L-605

Disclaimer
Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.

Provide all grade of these alloy by different shape & size is Our expertise

For any inquiry & request, don't hesitate to contact us