INCOLOY ALLOY 901 TECHNICAL DATA

 

Type Analysis

Element

Min

Max

Nickel + Cobalt

40.0

45.0

Chromium

11.0

14.0

Silicon

--

0.40

Sulfur

--

0.03

Cobalt

--

1.00

Iron

Remainder

Aluminum

--

0.35

Carbon

--

0.10

Manganese

--

0.50

Molybdenum

5.00

6.50

Titanium

2.80

3.10

Copper

--

0.50

Description

A nickel-iron-chromium alloy containing titanium and aluminum for precipitation hardening and molybdenum for solid-solution strengthening. The alloy has high yield strength and creep resistance at temperatures to about 1110°F (600°C). A substantial iron content enables the alloy to combine high strength with good forging characteristics. Used in gas turbines for discs and shafts. Standard products form is round.

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Corrosion Resistance

Alloy 901 has good corrosion resistance to the atmospheres normally found in jet engine operations. It has slightly lower scaling resistance than such alloy as Types 309 and 310 stainless steel.

Heat Treatment

Solution Treatment
1975/2025°F (1080/1107°C), hold 2 hours at heat, and water quench.

Stabiliztion Treatment
1400/1475°F (760/802°C), hold 2 to 4 hrs, and air cool.

Precipitation Hardening Treatment
1300/1375°F (704/746°C), hold for 24 hours, and air cool.

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Workability

Hot Working
Alloy 901 is forged between 2050°F (1121°C) and 1850°F (1010°C), metal temperature. Light hot work may be continued down to 1600°F (871°C) but not below. Metal temperature should not exceed 2050°F (1121°C) during rapid working. Billets should be charged into a hot furnace and heated rapidly through the precipitation hardening range.

Weldability
Alloy 901 can be welded by the inert-gas-arc method. It is difficult to weld. All welding should be done in the solution treated condition. Cold worked parts should be re-solution treated before welding. A re-solution treatment is recommended after welding before stabilizing and aging.

Typical Mechanical Properties

Tensile Properties
Solution Treated: 2000°F (1093°C), 2 hours, water quenched. Stabilized: 1425°F (774°C), 4 hours , air cooled. Aged: 1350°F (732°C), 24 hours, air cooled.

Test
Temperature

0.2% Offset
Yield Strength

Ultimate
Tensile Strength

% Elongation
in 2"

% Reduction
of Area

°F

°C

ksi

MPa

ksi

MPa

70
800
1000
1200
1300
1400
1500

21.1
427
538
649
704
760
816

125.0
116.5
113
117
114
102.5
79

862
803
779
807
786
707
545

175
159
156
150
130
107.5
81

1207
1096
1076
1034
896
741
559

15.0
16.0
17.0
14.0
11.5
9.0
13.0

19.0
25.5
29.0
21.0
15.5
14.5
20.0

Stress Rupture Strength
Solution Treated: 2000°F (1093°C), 2 hours, water quenched. Stabilized: 1425°F (774°C), 4 hours , air cooled. Aged: 1350°F (732°C), 24 hours, air cooled.

Test
Temperature

Stress to Produce Rupture in

°F

°C

10 Hours

100 Hours

1000 Hours

ksi

MPa

ksi

MPa

ksi

MPa

1000
1200
1350
1500

538
649
732
816

--
96.5
60
35

--
665
414
241

120
90
51
22.5

827
621
352
155

100
75
33
11

689
517
228
76

 

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Physical Properties

Density, lb/cu in.......................................................................... 0.294

              Mg/cu m.......................................................................... 8.14

Melting Range, °F............................................................... 2335-2455

                          °C............................................................... 1280-1345

Specific heat, Btu/lb-°F................................................................ 0.103

                       J/kg-°C..................................................................... 431

 Permeability at 200 oersted (15.9 kA/m)......................................1.013

 Coeffiecent of Expansion,  68-212°F, 10(-6) in/in-°F................... 7.50

                                             20-100°C, æm/m-°C......................... 13.50

 Electrical Resistivity, ohm-cir mil/ft............................................... 674

                                     æê-m........................................................... 1.12

Incoloy 901/ Nickel Alloy 901/ Nimonic 901®


Technical Data Sheet

Chemical Composition Limits

Weight%

Ni

Cr

Mo

Ti

Co

Cu

Mn

Si

Al

C

S

Fe

Alloy 901

42.5

12.5

5.75

2.9

1.0 max

0.5 max

0.5 max

0.4 max

0.35 max

0.1 max

0.03 max

Bal

Alloy 901 is an age-hardenable super alloy which contains Titanium and Aluminium for precipitation hardening and molybdenum for soild-solution strengthening. Alloy 901 has high yield strength and creep resistance at temperatures to about 1110°F (600°C). As Alloy 901 has a substantial iron content it enables alloy 901 to combine strength with good forging characteristics. Alloy 901 is commonly used for gas turbine engine discs, shafts, rings, casings and seals.

Heat Treatment:
Solution Treatment: 1975-2025°F / 2 hrs + Air Cool
Stabilization Heat Treatment: 1425 - 1475°F / 2-4 hrs + Air Cool
Precipitation Heat Treatment: 1325 - 1375 / 24 hrs +Any Cool 

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Typical Mechanical Properties

Material

Tensile Strength ksi

Yield Strength ksi

Elongation in 4D(%)

Reduction of Area %

Hardness HB

Alloy 901

150

100

12

15

302-388


Availability:

 

 

 
 

INCOLOY 901 Plate

INCOLOY 901 Fittings

INCOLOY 901 Tube / Pipe

 

 

 

 

 

INCOLOY 901Bar

INCOLOY 901 Sheet

INCOLOY 901 Coil /Strap

 

 

 

 

 

INCOLOY 901 Fasteners / Flanges

INCOLOY 901 Powder

INCOLOY 901 Welding Product

 

 

 

 

 

Specifications
UNS N09901
Werkstoff Number 2.4662
BR HR 55
AMS 5660
AMS 5661
AECMA PrEN2176
AECMA PrEN2177
ISO 9723
ISO 9725
MSRR 7029, MSRR 7031 
Nimonic alloy 901 (tradename) 

 
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

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