Mechanical properties of 0Cr25Ni6Mo3CuN

Nickel-based alloy 625 (UNS N06625/W.Nr. 2.4856) is a Ni-Cr-Mo alloy containing 9% Mo, 8-10% Ni and Cr, 3-5% Nb and other minor alloying elements. This alloy has a wide range of applications in the aerospace, medical, chemical and petrochemical industries due to its excellent combination of strength, ductility and corrosion resistance.

The mechanical properties of a material directly affect its ability to function efficiently in a given application. The mechanical properties of alloy 625 differ depending on the form or condition of the material. The basic mechanical properties for alloy 625 in an annealed condition are listed in Table 1.

Table 1. Basic mechanical properties of alloy 625 in the annealed condition

Property Value

Tensile Strength (psi) 80000

Yield Strength (psi) 70,000

Elongation (%) 40

% Elongation in 2 in. (50.8 mm) 35

Rockwell Hardness B 72

Alloy 625 has excellent mechanical properties at both elevated and cryogenic temperatures. At cryogenic temperatures (-253°C), alloy 625 can retain its strength up to about 173.9 MPa for tensile strength and 146.1 MPa for yield strength. In the temoprange from 0°C to 816°C, the strength of alloy 625 decreases slightly below its room temperature values.

At elevated temperatures, alloy 625 can retain its mechanical properties from temperatures up to about 982°C. Above this temperature, strength properties of the alloy start to decline rapidly. At 1100°C, it has a tensile strength of about 30-35 ksi and a yield strength of about 25-30 ksi.

Alloy 625 also has very good crack formation resistance. It has a low amount of precipitates at room temperature and high temperature. This feature makes alloy 625 relatively insensitive to stress corrosion cracking compared to other Ni-Cr-Mo alloy like Alloy C-276, which is prone to stress corrosion cracking in certain environments.

In addition to its excellent mechanical properties, alloy 625 also has good thermal and electrical conductivity. It is also highly resistant to oxidation, making it suitable for a variety of high temperature applications.

Overall, alloy 625 is an excellent nickel-based alloy for a wide range of applications due to its combination of excellent strength and ductility, corrosion resistance, crack formation resistance and thermal and electrical conductivity.

UNS S44617(Cr25Ni6Mo3CuN) is a stainless steel formulated for primary forming into wrought products. Cited properties are appropriate for the solution annealed and hot worked condition. It has a fairly low ductility among wrought austenitic stainless steels. In addition, it has a moderately low electrical conductivity.

The graph bars on the material properties cards below compare UNS S44617 stainless steel to wrought austenitic stainless steels (top), all iron alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means its 50% of the highest, and so on.

UNS S44617 stainless steel can be readily welded using appropriately selected techniques. It is data is greatly affected by the choice of welding procedure and filler material and should be evaluated carefully. It can also be machined, which makes it suitable for a wide range of applications.

The properties of UNS S44617 stainless steel include two common variations. This page shows summary ranges across both of them. For more specific values, follow the links immediately below. The graph bars on the material properties cards further below compare UNS S44617 stainless steel to other wrought stainless steels (top), all iron alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means its 50% of the highest, and so on.

Mechanical Properties

The mechanical properties of UNS S44617 stainless steel include yield strength, tensile strength, elongation, chapes, section modulus, elasticity and other mechanical properties.

For the solution annealed and hot worked condition the following properties are typical:

Yield Strength: 895 MPa (130 ksi)

Tensile Strength: 1060 MPa (154 ksi)

Elongation: 15-32 %

Hardness: 223-239 HBW

Thermal Properties

The thermal properties of UNS S44617 stainless steel include the following:

Thermal Expansion Coefficient: 14.5 µm/m-°C

Thermal Conductivity: 14.3 W/m-K

Specific Heat Capacity: 444 J/kg-K

Applications

UNS S44617 stainless steel is often used in a range of applications, including:

• Components for subsea use

• Marine and offshore applications

• Erosivity resistance

• Food processing equipment

• Chemical and petrochemical applications

• Heat exchangers and boilers