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QuesTek® Innovations Ferrium® C61™ Case-hardened Gear Steel with Ultrahigh-strength Core

Category Metal , Ferrous Metal , Alloy Steel
Manufacturer QuesTek® Innovations
Trade Name Ferrium®
Port Ningbo port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF QuesTek® Innovations Ferrium® C61™ Case-hardened Gear Steel with Ultrahigh-strength Core.pdf
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Material Notes:
Description: Ferrium® C61™ is a member of a new class of martensitic secondary-hardening gear and bearing steels that utilize an efficient M2C precipitate strengthening dispersion. Because of the efficiency of this strengthening dispersion, a superior combination of properties can be attained for a given application. Ferrium® C61™ was designed to provide carburized surface properties similar to conventional gear steels such as AISI 9310 and EN36C with the added benefit of an ultra high-strength core along with excellent fracture toughness. C61™ should be considered for use in applications that require high case hardness, high strength, high toughness, and thermal resistance. C61™ has very high hardenability and only requires mild quenching.Typical Applications: Power transmission shaft, gears and other demanding applications in aerospace, energy, and racing/off-road/mission-critical vehicles and other industries where weight savings, compactness, high temperature resistance and high surface fatigue resistance are valued. The high core strength and high hardenability of Ferrium® C61™ particularly benefits structural components such as shafts with integral gearing.Workability:Fording: Forge at 1800-2100°F (982-1149°C) Heat Treatment:Normalizing: Heat uniformly to 1875°F(1024°C) and air cool..Annealing: Heat uniformly to 1250°F(677°C), hold for 2 to 8 hours and air cool.. Hardness should be less than 327 HBW.Carburizing and Hardening: Vacuum carburize at 1830°F (1000°C), followed by quenching in gas (1.5 Bar Nitrogen or higher) or oil medium.Refrigerate: To obtain optimum case hardness, a refrigeration treatment at -100°F (-73°C) or lower for 1 hour is recommended. This should be performed with minimal delay after completion of the quench.Temper: At 900°F (482°C)Product Forms: Ferrium® C61™ is manufactured in typical ingot, bar and billet forms.Ferrium is designed by Questek Innovations, LLC. and is manufactured by Latrobe Specialty Steel under license.
Physical Properties Metric English Comments
Density 7.98 g/cc
0.288 lb/in³
Mechanical Properties Metric English Comments
Hardness, Rockwell C 44
44
Distance from Quenched End 1 [in]
44
44
Distance from Quenched End 1 1/4 [in]
44
44
Distance from Quenched End 1 1/2 [in]
44
44
Distance from Quenched End 1 3/4 [in]
44
44
Distance from Quenched End 2 [in]
44.5
44.5
Distance from Quenched End 3/4 [in]
45
45
Distance from Quenched End 1/4 [in]
45
45
Distance from Quenched End 1/2 [in]
48 - 50
48 - 50
Typical Core Hardness
60 - 62
60 - 62
Typical Case Hardness
Hardness, Vickers 540

@Load 0.500 kg
540

@Load 1.10 lb
Depth from Surface .070 [in]
550

@Load 0.500 kg
550

@Load 1.10 lb
Depth from Surface .045 [in]
600

@Load 0.500 kg
600

@Load 1.10 lb
Depth from Surface .029 [in]
650

@Load 0.500 kg
650

@Load 1.10 lb
Depth from Surface .02 [in]
700

@Load 0.500 kg
700

@Load 1.10 lb
Depth from Surface .014 [in]
Tensile Strength at Break >= 1720 MPa
>= 250000 psi
Tensile Strength, Ultimate 1380 MPa

@Temperature 427 °C
200000 psi

@Temperature 800 °F
1520 MPa

@Temperature 204 °C
220000 psi

@Temperature 400 °F
1520 MPa

@Temperature 316 °C
220000 psi

@Temperature 600 °F
1650 MPa

@Temperature 21.1 °C
240000 psi

@Temperature 70.0 °F
Tensile Strength, Yield 1210 MPa

@Temperature 427 °C
175000 psi

@Temperature 800 °F
1340 MPa

@Temperature 316 °C
195000 psi

@Temperature 600 °F
1380 MPa

@Temperature 204 °C
200000 psi

@Temperature 400 °F
1550 MPa

@Temperature 21.1 °C
225000 psi

@Temperature 70.0 °F
>= 1430 MPa

@Strain 0.200 %
>= 208000 psi

@Strain 0.200 %
Elongation at Break >= 13 %
>= 13 %
15 %

@Temperature 21.1 °C
15 %

@Temperature 70.0 °F
15 %

@Temperature 204 °C
15 %

@Temperature 400 °F
15 %

@Temperature 316 °C
15 %

@Temperature 600 °F
15 %

@Temperature 427 °C
15 %

@Temperature 800 °F
Reduction of Area 68 %

@Temperature 21.1 °C
68 %

@Temperature 70.0 °F
68 %

@Temperature 204 °C
68 %

@Temperature 400 °F
68 %

@Temperature 316 °C
68 %

@Temperature 600 °F
68 %

@Temperature 427 °C
68 %

@Temperature 800 °F
Fatigue Strength <= 931 MPa

@# of Cycles >=1.00e+7
<= 135000 psi

@# of Cycles >=1.00e+7
<= 1030 MPa

@# of Cycles >=1.00e+7
<= 150000 psi

@# of Cycles >=1.00e+7
<= 1070 MPa

@# of Cycles >=1.00e+7
<= 155000 psi

@# of Cycles >=1.00e+7
<= 1100 MPa

@# of Cycles 6.30e+6
<= 160000 psi

@# of Cycles 6.30e+6
<= 1120 MPa

@# of Cycles 7.30e+6
<= 162000 psi

@# of Cycles 7.30e+6
<= 1140 MPa

@# of Cycles 130000
<= 165000 psi

@# of Cycles 130000
<= 1140 MPa

@# of Cycles 330000
<= 165000 psi

@# of Cycles 330000
<= 1140 MPa

@# of Cycles 8.00e+6
<= 165000 psi

@# of Cycles 8.00e+6
<= 1210 MPa

@# of Cycles 120000
<= 175000 psi

@# of Cycles 120000
<= 1280 MPa

@# of Cycles 80000
<= 185000 psi

@# of Cycles 80000
<= 1340 MPa

@# of Cycles 43000
<= 195000 psi

@# of Cycles 43000
Fracture Toughness 143 MPa-m½
130 ksi-in½
Charpy Impact 74.6 J
55.0 ft-lb
V-notch
Thermal Properties Metric English Comments
CTE, linear 9.54 µm/m-°C

@Temperature 24.0 - 93.0 °C
5.30 µin/in-°F

@Temperature 75.2 - 199 °F
9.59 µm/m-°C

@Temperature 24.0 - 204 °C
5.33 µin/in-°F

@Temperature 75.2 - 399 °F
10.76 µm/m-°C

@Temperature 24.0 - 316 °C
5.978 µin/in-°F

@Temperature 75.2 - 601 °F
11.09 µm/m-°C

@Temperature 24.0 - 427 °C
6.161 µin/in-°F

@Temperature 75.2 - 801 °F
11.28 µm/m-°C

@Temperature 24.0 - 538 °C
6.267 µin/in-°F

@Temperature 75.2 - 1000 °F
Component Elements Properties Metric English Comments
Carbon, C 0.15 %
0.15 %
Chromium, Cr 3.5 %
3.5 %
Cobalt, Co 18 %
18 %
Iron, Fe 67.67 %
67.67 %
Molybdenum, Mo 1.1 %
1.1 %
Nickel, Ni 9.5 %
9.5 %
Vanadium, V 0.080 %
0.080 %
Descriptive Properties Value Comments
Cycles of Failure 46100
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