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Hunan Hemway Steel Co., Ltd.
Alloy 725, often referred to as Inconel 725 (where Inconel is a trademark of Special Metals Corp), is a nickel-chromium alloy with significant additions of molybdenum, niobium and titanium.
Alloy 725/Inconel 725 can be supplied in the hot worked, annealed and age-hardened conditions. It is age-hardened to achieve extremely high strength, approximately twice that of Alloy 625 in the annealed condition. This is through the precipitation of the ϒ” phase during a controlled heat treatment process.
Our Inconel 725 round bar & rod are ASTM B805 compliant. Various sizes and lengths can be offered. The precipitation strengthening properties of Inconel 725 round bar & rod allow it to exhibit excellent performance in harsh environments such as high temperature, high pressure, and strong corrosion. In addition, the alloy also has good weldability, machinability and castability. It can be used to manufacture parts of various complex shapes.
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|
Cr |
Ni |
Mo |
Co |
Nb (+Ta) |
Ti |
W |
Cu |
C |
Mn |
N |
Si |
P |
S |
Fe |
Al |
|
Min |
19.00 |
55.00 |
7.00 |
|
2.75 |
1.00 |
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Max |
22.50 |
59.00 |
9.50 |
|
4.00 |
1.70 |
|
|
0.03 |
0.35 |
|
0.20 |
0.015 |
0.01 |
Bal |
0.35 |
|
|
Bars up to 3” (76mm) diameter or section |
Bars greater than 10” (254mm) diameter or section |
Bars greater than 10” (254mm) diameter or section |
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0.2% Proof Stress, min |
827 N/mm2 |
120 ksi |
827 N/mm2 |
120 ksi |
827 N/mm2 |
120 ksi |
|
Tensile strength, min |
1034 N/mm2 |
150 ksi |
1034 N/mm2 |
150 ksi |
1034 N/mm2 |
150 ksi |
|
Elongation, 5.65√S0 and 4D |
20% |
|
20% |
|
20% |
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|
Reduction of Area |
35% |
|
35% |
|
35% |
|
|
Hardness (Rockwell C) |
<43 |
|
<43 |
|
<43 |
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Impact Strength (-60oC) Longitudinal, Typical |
54J av (47J min) |
40 ft.lb av (35 ft.lb min) |
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Impact Strength (-60oC) Transverse, Typical |
|
|
50J av (43J min) |
37 ft.lb av (32 ft.lb min) |
43J av (37J min) |
32 ft.lb av (27 ft.lb min) |
Notes:
Tensile testing shall be carried out in accordance with ASTM A370 or EN10002-1
Minimum properties quoted (tested at room temperature in a longitudinal direction)
Testing performed on each melt of material per heat treatment batch
|
Density (Kg.m-1) |
8310 |
|
Magnetic Permeability (20°C) |
< 1.001 |
|
Young’s Modulus (kN/mm2) |
204 |
|
Poissons Ration |
0.31 |
|
Specific Heat, 20°C (J/(g.K)) |
0.43 |
|
Electrical Resistivity, 20°C (µΩ-m) |
1.144 |
|
Thermal conductivity, 20°C (W/(m.K)) |
10.6 |
|
Mean coefficient of thermal expansion, 20-100°C (/K) |
13 x 10-6 |
