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Stellite 6K

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Stellite 6K properties and heat treatment forged piece, Including Stellite 6K application and specifications, We have all specifications，Including Stellite 6K steel plate, Stellite 6K sheet, Stellite 6K square steel, Stellite 6K flat bar,Stellite 6K round bar,Stellite 6K forgings, we can own production and sales.

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forged/hot rolling/ extrusion of steel

We can produce the Stellite 6K has the following specifications:

Round bar steel: 1mm to 3000mm

Square-shape steel: 1mm to 2000mm

Plate steel:0.1mm to 2500mm

Width: 10mm to 2500mm

Lenth: We can supply any lenth based on the customer's requirement.

Forging: Shafts with flanks/pipes/tubes/slugs/donuts/cubes/other shapes

Tubings: OD: φ6-219 mm, with wall thickness ranging from 1-35 mm.

Finished goods condition: hot forging/hot rolling + annealing/normalizing + tempering/quenching + tempering/any conditions based on the customer's requirement

Surface conditions: scaled (hot working finish)/ground/rough machining/fine machining/based on the customer's requirement

Furnaces for metallurgical processing: electrode arc + LF/VD/VOD/ESR/Vacuum consumable electrode.

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Chemical composition % of the ladle analysis of grade Stellite 6K and Standards

Certified Mechanical Properties.
Covers Stellite®6B in the form of sheet and plate up to 1 inch thickness and round bar up to 3.5” diameter.
Minimum Properties of Wrought Stellite® 6B

Property
Value
Tensile Strength
130 ksi (896 MPa)
MIN
Yield Strength at 0.2% offset
70 ksi (483 MPa)
MIN
Elongation in 4D
5%
MIN
Reduction in Area
7%
MIN
Hardness
33-43 HRC
 

 
Properties Data
The properties listed in this booklet are typical or average values based on laboratory tests conducted by the manufacturer. They are indicative only of the results obtained in such tests and should not be considered as guaranteed maximums or minimums. Materials must be tested under actual service conditions to determine their suitability for a particular purpose. All data represent the average of four or less tests unless otherwise noted. The secondary units (metric) used in this booklet are those of the SI system.
Chemical Composition, Percent

Stellite®
Cobalt
Nickel
Silicon
Iron
Manganese
Chromium
Molybdenum
Tungsten
Carbon
6B
Bal.
3.00*
2.00*
3.00*
2.00*
28.00-32.00
1.50*
3.50-5.50
0.90-1.40
6K
Bal.
3.00*
2.00*
3.00*
2.00*
28.00-32.00
1.50*
3.50-5.50
1.40-1.90

 
*Maximum
Average Physical Properties
Physical Properties
Temp., degrees C
Metric Units Stellite
6B 6K
Temp., degrees F
British Units Stellite
6B 6K
Hardness Limits
Typical
 
22
33-43 RC 40-42* RC
36-40 RC 43-47 RC
 
72
33-43 RC 40-42* RC
36-40 RC 43-47 RC
Density
22
Kg/m3
8387 8387
72
lb/in.3
0.303 0.303
Melting Range
 
1265 to 1354˚C
 
2310 to 2470 deg. F
Electrical Resistivity
22
microhm-m
0.91 -
72
microhm-m
36 -
Thermal Conductivity
22
watt-cm/sq. cm-deg. C
72
Btu-in/sq.ft.hr.-deg. F
103 -
 
 
0.147 -
 
(546 ohms per cil. mil. ft.)
 
 
x 10-6/m/m.K
 
microinches/in.-deg. F
 
0-100
13.9 13.8
32-212
7.7 7.7
 
0-200
14.1 13.8
32-392
7.8 7.7
 
0-300
14.5 13.8
32-572
8.0 7.7
 
0-400
14.7 13.8
32-752
8.2 7.7
Mean Coefficient of
0-500
15.0 13.8
32-932
8.3 7.7
Thermal Expansion
0-600
15.3 14.0
32-1112
8.5 7.8
 
0-700
15.8 14.2
32-1292
8.8 7.9
 
0-800
16.3 14.5
32-1472
9.1 8.1
 
0-900
16.9 14.9
32-1 652
9.4 8.3
 
0-1000
17.4 15.5
32-1832
9.7 8.6
Electrical Conductivity
 
 
 
 
Compared to Copper, percent
22
1.90 -
72
1.90 -
 
 
J/kg•K Room
 
Btu/lb-deg. F
Specific Heat (calculated)
Room
423 -
 
0.101 -
Magnetic Permeability at 200 Oersteds (15.900
22
<1.2 <1.2
72
<1.2 <1.2
A/m)
 
 
 
 
Reflecting Power, percent
 
57-70
 
57-70
 
*Minimum depending on gauge
 
Average Hot Hardness

Stellite®
Test Temp.,
deg. F (deg. C)
Brinell Hardness at Temperature,
Mutual Indentation Method
 
1000
(538)
226
 
1200
(649)
203
6B
1400
(760)
167
 
1600
(871)
102

 

Average Compressive Strength

Stellite®
Form
Test Temp.
Average Compressive Strength
Ksi (MPa)
6B
1/2-in. (12.7 mm), Plate 1
Room
347 (2392)
6K
Sheet 1
Room
325 (2241)

 
Average Modulus of Rupture

Stellite®
Form
Test Temp.
Average Modulus of Rupture
Ksi (MPa)
6B
Sheet 1
Room
338 (2360)

 
Average Modulus of Elasticity

Stellite®
Form
Test Temp.
Average Modulus of Elasticity
psi x 106 (MPa)
6B
Sheet 1
Room
30.4 (210,000)
6B
5/8-in. (15.9 mm), Bar
Room
31.1 (214,000)

Average Izod Impact Strength (un-notched)

Stellite®
Form
Test Temp.
Average Izod Impact Strength (un-notched) ft. lbs. J
6B
1/2-in (12.7 mm), Plate 1
Room
62 84

 
Average Charpy Impact Strength

Stellite®
Test Temp.,
deg. F (deg. C)
Type of Test
Average Charpy Impact Strength, ft. lbs. (J)
Longitudinal Transverse
 
 
Un-notched
72 (98)
65 (88)
 
Room
notched
6 (8)
-
 
1000 (538)
Un-notched
81 (110)
-
6B
 
notched
15 (20)
-
1/2-in. (12.7 mm), Plate 1
 
Un-notched
116 (157)
-
 
1250 (677)
notched
15 (20)
-
 
1500 (816)
Un-notched
notched
126 (171)
15 (20)
-
-

1 Solution heat-treated at 2250 deg. F (1232 deg. C), air cooled
 
Average Room Temperature Data - Stellite® 6B

FORM
Condition
Ultimate
Tensile Strength,
Ksi (MPa)
Yield Strength
at 0.2% offset
Ksi (MPa)
Elongation in 2 in.
50.8 mm, percent
Hardness,
Rockwell C
Sheet,
0.040 in. (1.0 mm), thick
Solution Heat-treated*
145.0 (1000)a
90.1 (621)a
12a
36a
Sheet,
0.065 in. (1.7 mm), thick
Solution Heat-treated*
140.8 (971)a
86.7 (598)a
11a
36a
Sheet,
0.125 in. (3.2 mm), thick
Solution Heat-treated*
144.7 (998)a
89.8 (619)a
11a
37a
Sheet,
0.187 in. (4.8 mm), thick
Solution Heat-treated*
144.5 (996)a
89.3 (616)a
10a
37a

Solution heat-treated at 2250 deg. F (1232 deg. C), air cooled

a Average of 27-31 tests

Average Tensile Data 1

Stellite®
Form
Test Temp.,
Ultimate Tensile
Strength
Yield Strength
at 0.2% offset,
Elongation in 2 in.
50.8 mm, percent
deg. F (deg. C)
Ksi
(MPa)
Ksi
(MPa)
 
 
Room
146.0
(1007)
91.6
(632)
11
 
 
1500
(816)
73.9
(509)
45.4
(313)
17
 
0.063 in. (1.6 mm),
1600
(871)
55.8
(385)
39.2
(270)
18
 
Sheet
1800
(982)
32.6
(225)
19.8
(137)
36
 
 
2000
(1093)
19.5
(134)
10.9
(75)
44
 
 
2100
(1149)
13.3
(92)
7.7
(53)
22
 
 
Room
148.0
(1020)
88.0
(607)
7
6B
1/2 in. (12.7 mm),
1000
(538)
133.0
(917)
58.5
(403)
9
 
Plate
1250
(677)
115.0
(793)
60.6
(418)
9
 
 
Room
154.1
(1063)
92.6
(638)
17*
 
 
600
(316)
147.8
(1019)
74.5
(514)
30*
 
5/8 in. (15.9 mm),
1000
(538)
129.1
(890)
67.3
(464)
28*
 
Bar
1500
(816)
75.4
(520)
46.5
(321)
28
 
 
1600
(871)
58.3
(402)
37.9
(261)
34*
 
 
Room
176.5
(1217)
102.7
(708)
4
 
 
1200
(649)
146.0
(1007)
-
-
8
6K
0.063 in. (1.6 mm),
1500
(816)
70.2
(484)
44.5
(307)
17
 
Sheet
1800
(982)
34.1
(235)
19.3
(133)
28
 
 
2000
(1093)
17.4
(120)
8.6
(59)
53

1 Solution heat-treated at 2250 deg. F (1232 deg. C), air cooled.
*Elongation, percent in 1 in. (25.4 mm).

Average Cavitation-Erosion Data

Alloy
Test Duration, hrs.
Weight loss, mg.
Stellite® 6B
Type 304 stainless steel
100
7
42.3
39.9

Average Abrasive Wear Data

Alloy
Condition
Volume Loss,
mm3
Hardness,
Rockwell
Wear
Coefficient1
Stellite® 6B
Mill annealed
8.2
C-38
0.471 x 10-3
Stellite® 6K
Mill annealed
13.3
C-46
0.946 x 10-3
Stellite® 25
Mill annealed
53.0
C-24
2.00 x 10-3
 
1 hr. at 1600 deg. F
 
 
 
 
(871 deg. C)
 
 
 
1090 steel
water quenched +
37.2
C-55
8.00 x 10-3
 
4 min, at 900 deg. F
 
 
 
 
(482 deg. C)
 
 
 
Type 316
 
 
 
 
As received sheet
81.4
B-86
2.0 x 10-3
Type 304
 
 
 
 
As received sheet
102.1
B-92
3.00 x 1 0-3

Average Adhesive Wear Data*

Alloy
Condition
Ring Alloy
Volume Loss,
mm3
Wear
Coefficient1
Stellite® 6B
Mill annealed
4620 steel
0.293
3.70 x 10-5
Stellite® 6K
Mill annealed
4620 steel
0.561
8.73 x 10-5
Stellite® 25
Mill annealed
4620 steel
0.285
2.50 x 10-5
 
1 hr. at 1600 deg. F
 
 
 
 
(871 deg. C)
 
 
 
1090 steel
water quenched +
4620 steel
0.293
6.00 x 10-5
 
4 min, at 900 deg. F
 
 
 
 
(482 deg. C)
 
 
 

Average Coefficients Of Static Friction For Some Common Materials


 

Material Against
Stellite® 6B
Cast Iron
Bronze
Aluminium
Lead
Stellite® 6B
0.119
0.123
0.125
0.138
0.119
Cast Iron
0.123
0.199
0.245
0.213
0.225
Bronze
0.125
0.245
0.231
0.257
0.249
Aluminium
0.138
0.213
0.257
0.213
0.328
Lead
0.119
0.225
0.249
0.328
0.290

Coefficient represents tangent of angle of repose. Tests made on dry surface having better than 120 grit finishes. All values based on averages and are to be used comparatively and not as absolute values.
* Average of two or more tests against a case-hardened SAE 4620 steel ring (Rockwell C-63).
1 The wear coefficient (K) was calculated using the equation where V = Wear volume (mm3)

P = Load (kg)
L = Sliding distance (mm)
h = Diamond pyramid hardness
A combination of a low wear coefficient and a high hardness is desirable for good wear resistance.

Average Corrosion Data - Stellite® 6B*

Media
Concentration,
percent by Weight
Test Temp.,
deg F (deg. C)
Average Penetration Rate per Year**
mils mm
Acetic Acid
10
Boiling
0.08
0.002
Acetic Acid
30
Boiling
0.04
0.001
Acetic Acid
50
Boiling
0.02
<0.001
Acetic Acid
70
Boiling
0.06
<0.002
Acetic Acid
99
Boiling
0.03
<0.001
Chromic Acid
10
150 (66)
95
2.41
Formic Acid
10
Boiling
20
0.51
Formic Acid
30
Boiling
26
0.66
Formic Acid
50
Boiling
47
1.19
Formic Acid
70
Boiling
50
1.27
Formic Acid
88
Boiling
23
0.58
Hydrochloric Acid
2
Room
0.1
<0.003
Hydrochloric Acid
5
Room
63
1.60
Hydrochloric Acid
10
Room
108
2.74
Hydrochloric Acid
20
Room
93
2.36
Hydrochloric Acid
2
150 (66)
0.1
<0.003
Hydrochloric Acid
5
150 (66)
>1000
>25.4
Hydrochloric Acid
10
150 (66)
>1000
>25.4
Hydrochloric Acid
20
150 (66)
>1000
>25.4
Nitric Acid
10
Boiling
0.15
<0.004
Nitric Acid
30
Boiling
6
0.15
Nitric Acid
50
Boiling
>1000
>25.4
Nitric Acid
70
Boiling
>1000
>25.4
Phosphoric Acid
10
Boiling
Nil
Nil
Phosphoric Acid
30
Boiling
2
0.05
Phosphoric Acid
50
Boiling
19
0.48
Phosphoric Acid
70
Boiling
23
0.58
Phosphoric Acid
85
Boiling
611
15.5
Sodium Hydroxide
30
Boiling
13
0.33
Sulfuric Acid
10
Room
0.02
<0.001
Sulfuric Acid
30
Room
Nil
Nil
Sulfuric Acid
50
Room
0.4
0.01
Sulfuric Acid
77
Room
0.7
0.02
Sulfuric Acid
10
150 (66)
0.02
<0.001
Sulfuric Acid
30
150 (66)
0.09
<0.003
Sulfuric Acid
50
150 (66)
>1000
>25.4
Sulfuric Acid
77
150 (66)
176
4.5
Sulfuric Acid
2
Boiling
31
0.79
Sulfuric Acid
5
Boiling
91
2.31
Sulfuric Acid
10
Boiling
157
3.99
Sulfuric Acid
20
Boiling
360
9.14
Sulfuric Acid
50
Boiling
>1000
>25.4
Sulfuric Acid
30
Boiling
>1000
>25.4
Sulfuric Acid
77
Boiling
>1000
>25.4
Ferric Chloride
10
Room
13
0.33***
(10 days without crevice)
 
 
 
 
Ferric Chloride
10
Room
9**
0.23***
(10 days with crevice bolt)
 
 
 
 
Ferric Chloride +
5
Room
18
0.46***
Sodium Chloride (10 days)
10
 
 
 
Potassium Permanganate +
2
194 (90)
8
0
.20
sodium Chloride (120 hrs)
2
 
 
 

* Determined in laboratory tests. It is recommended that samples be tested under actual plant conditions.
** Corrosion rates for all duplicate samples based on an average of 4-24 hour test periods.
*** Samples pitted during test.

Average Stress Rupture and Creep Data

Stellite®
Test Temp.,
deg. F (deg. C)
Stress
Ksi (MPa)
Initial
Elongation,
percent
Life, hrs.
Time in hours
for total Elongation, % of:
0.5 1.0 2.0
Elongation
at Rupture,
percent
 
1000
(538)
60
(414)
0.70
192.81
-
-
-
0.8
 
1200
(649)
50
(345)
0.45
361.4
0.5
113.8
-
3.0
6B
1400
(760)
35
(241)
0.35
59.3
0.4
3.8
16.3
5.1
0.063 in. (1.6
1500
(816)
25
(172)
0.35
70.6
0.2
4.3
19.9
4.7
mm),
1600
(871)
19
(131)
0.10
57.9
0.5
2.2
11.1
4.3
Sheet2
1700
(927)
12
(83)
0.19
104.0
1.8
20.9
89.9
2.6
 
1800
(982)
8
(55)
0.05
113.4
5.1
22.7
57.6
5.5
 
2000
(1093)
2
(14)
0.004
116.7
4.4
-
-
13.3

1 Test discontinued before rupture.
2 Specimens were solution heat-treated at 2250 deg. F (1232 deg. C) and air cooled prior to testing.
Fusion Welding
Stellite® 6B (AMS 5894) and Stellite® 6K can be welded by gas tungsten-arc (TIG) with an argon flow of 25 CFH, gas metal-arc (MIG), shielded metal-arc (coated electrode), and oxy-acetylene in this order of preference. The oxy-acetylene method should be used with discretion and care in that Stellite will “boil” during Welding which may cause porosity. Use a 3x reducing flame to minimize oxidation, penetration, and inter-alloying.
Stellite® 6B (AMS 5894) and Stellite® 6K should be preheated and maintained at 1000°F (35 8°C) to prevent cracking during Welding and then still air cooled. Fixturing which would chill the weld rapidly should not be used. Standard weld joints are recommended. Inconel® 82, 92, or 625 filler metals are recommended for joining Stellite® 6B (AMS 5894) to softer materials such as carbon steel or stainless steel, while the harder cobalt- base filler metals such as Stellite® 6 and Stellite® 21 are recommended for joining Stellite® 6B (AMS 5894) to itself, especially if wear resistance is required in the weld areas. In the latter case, Inconel® 82, 92, or 625 may be used for root passes and then be overlayed with the harder
materials. Gas shielding of the root side of the gas tungsten-arc weldments is not mandatory but is recommended in order to improve weld penetration.
Adequate ventilation is required to control exposure to airborne dust, fumes, and particulate when machining, grinding or Welding Stellite alloys. MSDS sheets are available.
Brazing
Stellite® 6B (AMS 5894) and Stellite® 6K are readily joined to other materials by brazing. All forms of surface dirt such as paint, ink, oil, chemical residues, etc., must be removed from the mating parts by etching, solvent scrubbing, degreasing, or other means. In addition, fluxing will be required during torch brazing operations when using silver brazing filler metal to help clean the joint and allow the filler metal to flow more freely over the mating surfaces. Brush joining areas generously with brazing flux prior to heating. When torch or induction brazing, as soon as the brazing filler metal melts, the source of heat should be removed and the parts positioned. The assembly should then be pressed together to squeeze out the excess flux and still air cooled. The parts should not be quenched.
Other brazing filler metals (i.e., gold, palladium, or nickel-based alloys) are satisfactory for joining Stellite® 6B (AMS 5894) and Stellite® 6K. Brazing filler metal selection depends on the service conditions expected.
A close fit of the mating surfaces is recommended. The finished joints will have greater strength if the filler metal is very thin, generally 0.001 - 0.005” (0.03 - 0.13 mm) thick.
Brazing with high-temperature filler materials is generally performed in a furnace. Induction and resistance heating with salt-bath and
metal-bath dip brazing have limited application. Vacuum furnaces held at less than one micron pressure or controlled atmosphere furnaces, having adequate moisture control at brazing temperatures (less than 60° F ( 15°C) dew point), produce the most satisfactory results. Controlled atmospheres such as hydrogen or cracked ammonia are suitable for brazing Stellite® 6B (AMS 5894) and Stellite® 6K base materials.


Machining performance

Download Stellite 6K the mechanical properties of the report, the report provides detailed performance analysis and application. Download >>

Principal Design Features

One of the most widely used precipitation hardening grades in the business. While soft and ductile in the solution annealed condition, it is capable of high properties with a single precipitation or aging treatment. Characterized by good corrosion resistance, high harness, toughness and strength.

Machinability

Long, gummy chips characterize this alloys machinability. It can be machined in the annealed condition, however condition H1150M will yield best results. Post machining solution treatment of parts will be required prior to final hardening if machining in this condition.

Heat Treatment

CONDITION A--Soak at 1900 F (1038 C) for 30 minutes and cool below 60 F (16 C) for complete martensite transformation. CONDITION H 950- Treat Condition A material at 900 F(482 C) for 1 hour, air cool.. CONDITION H925, H1025, H1075, H1100, H1150- Soak solution treated material for 4 hours at specified temperature, air cool, CONDITION H1150M- Soak solution treated material at 1400 F (760 C) for 2 hours, air cool, then re-heat to 1150 F (620 C) for 4 hours and air cool.

Welding

Successfully welded by common fusion and resistance methods, this alloy should not be joined by oxyacetylene welding. AWS E/ER630 filler metal is recommended if required.

Forging

Soak for 1 hour at 2150 F (1177 C) prior to forging. Do not work below 1850 F (1010 C). Post-work solution treatment is required prior to final hardening.




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