Nickel-Based Super Alloy Inconel 625 - Properties and Applications by United Performance Alloys

Topics Covered

Background
Properties of Nickel Alloy Inconel 625
Chemical Composition of Inconel 625
Resistance to Corrosion and Oxidation of Inconel 625
Physical Properties of Inconel 625
Thermal Conductivity of Inconel 625
Electrical Resistivity of Inconel 625
Mechanical Properties of Inconel 625
Standards
Applications of Inconel 625

Background

United Performance Metals is a leading supplier of specialty stainless steel and high temperature alloys. In business since 1982, we have experience serving the needs of customers in diverse markets including aerospace, aircraft, automotive, medical, food service, house-wares, and many others.

United Performance Metals stocks a comprehensive inventory of stainless steel sheet, stainless steel coil and stainless steel plate. We are also specialists in high temperature and cobalt alloys including Inconel 625, Inconel 718, A-286, 188 Alloy and L605.

In addition to our comprehensive inventory, we also have complete in-house processing capabilities including leveling, shearing, slitting and edging. When you call, you’ll talk to experienced people who know their business, and yours. Make your life a little easier.

Properties of Nickel Alloy Inconel 625

Inconel 625 is a nickel-based super alloy that possesses excellent resistance to oxidation and corrosion in a broad range of environments. Additionally this alloy has outstanding strength and toughness at temperatures ranging from cryogenic to 2000°F. This alloy possesses a high degree of formability and shows better weldability than many other highly alloyed nickel based materials.

Chemical Composition of Inconel 625

Typical chemical analysis of Inconel 625.

Element
Percentage
Carbon
0.010 max
Manganese
0.50 max
Phosphorus
0.015 max
Sulfur
0.015 max
Silicon
0.50 max
Chromium
20.00 - 23.00
Nickel
Balance
Molybdenum
8.00 - 10.00
Iron
5.00 max
Titanium
0.40 max
Aluminum
0.40 max
Tantalum
0.05 max

Resistance to Corrosion and Oxidation of Inconel 625

The high level of chromium and molybdenum in Inconel 625 alloy provides a high level of pitting and crevice corrosion resistance to chloride contaminated media, such as sea water, neutral salts and brines.

Physical Properties of Inconel 625

  • Density: 0.303 lb/in3 (8.44 g/cm3)
  • Specific Gravity: 8.44
  • Melting Range: 2350 - 2460°F (1280 - 1350°C)
  • Specific Heat: 0.098 Btu/lb x °F (410 Joules/kg x °K)
  • Magnetic Permeability (75°F, 200 oersted): 1.0006

Thermal Conductivity of Inconel 625

Thermal conductivity data as a function of temperature for Inconel 625 is provided in the follwoing table.

Temperature Range

Linear Coefficients of Thermal Expansion1
x 10-6

Thermal Conductivity2 3
°C
°F
/°C
/°F
W/m·K
Btu/(hr/ft²/in/°F)
-157
-250
-
-
7.3
4.2
-129
-200
-
-
7.4
4.3
-73
-100
-
-
8.3
4.8
-18
0
-
-
9.2
5.3
21
70
-
-
9.9
5.7
38
100
-
-
10.0
5.8
93
200
12.8
7.1
10.7
6.3
204
400
13.1
7.3
12.6
7.3
316
600
13.3
7.4
14.2
8.2
427
800
13.7
7.6
15.7
9.1
538
1000
14.0
7.8
17.5
10.1
649
1200
14.8
8.2
19.0
11.0
760
1400
15.3
8.5
20.8
12.0
871
1600
15.8
8.8
22.8
13.2
927
1700
16.2
9.0
-
-
982
1800
-
-
25.3
14.6

1. Average coefficient from 70°F (21°C) to temperature shown
2. Measurements made at Battelle Memorial Institute
3. Material annealed 2100°F (1149°C)

Electrical Resistivity of Inconel 625

Electrical resistance data for Inconel 625 is given below.

Temperature
microhm-cm
°C
°F
21
70
128.9
38
100
129.6
93
200
131.9
204
400
133.9
316
600
134.9
427
800
135.9
538
1000
137.9
649
1200
137.9
760
1400
136.9
871
1600
135.9
982
1800
134.9
1093
2000
133.9

Mechanical Properties of Inconel 625

Typical room temperature tensile properties of Inconel 625 annealed at 1920°F (1065°C) follow.

Temperature
0.2% Yield Strength
Ultimate Tensile Strength
Elongation Percent
°F
°C
psi
MPa
psi
MPa
1920
1065
63,000
430
136,000
940
51.5

Standards

United Performance Metals Inconel 625 is supplied to AMS 5599 and UNS Designation N06625.

Applications of Inconel 625

Inconel 625 is typically used for:

  • Jet engine
  • Chemical processing equipment

For sizes and availability of Inconel 625 contact United Performance Metals.

Source: United Performance Metals

For more information on this source, please visit United Performance Metals

Comments

  1. Tayyab Hussain Tayyab Hussain Islamic Republic of Pakistan says:

    Do you have any alloy which can withstand 1700C (3000F) temperature? I want to use that material as a mold to make billets at my home foundry.

  2. Isaac Lin Isaac Lin United States says:

    You're missing the most important differentiator: 3.15-4.15% Niobium/Columbium

The opinions expressed here are the views of the writer and do not necessarily reflect the views and opinions of AZoM.com.

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