Inconel® 625 stainless steel, with a chromium-nickel and low carbon content, is used for its outstanding corrosion resistance, especially at elevated temperatures. This alloy has similar physical properties and fabrication characteristics as Type 304 at room temperature. The unique chemistry of Inconel® 625 increases the corrosion resistance in saltwater applications and against high-temperature oxidation. In the medical field, it has served the MRI compatible market due to its high nickel content that keeps a low magnetic permeability even at high strengths. Inconel® 625 is more expensive than 304, but is readily available.
Inconel is a registered trademark of Huntington Alloys Corporation.
|Columbium (Nb) + Tantalum||3.15%||4.15%|
Possible Mechanical Properties
|Hardness||28 HRC||42 HRC|
|Tensile Strength||130 ksi||200 ksi|
|Elastic modulus||30,000 ksi|
|Shear modulus||11,200 ksi|
|Mean specific heat (32-212F)||.098 Btu/lb/F|
|Thermal conductivity (32-212F)||112 BTU-in/hr-ft2 - F|
|Mean CTE (70-1700F)||9.0x10-6 in/in/F|
|Electrical resistivity (68F)||126 microohm-cm|
|Magnetic Permeability (Annealed)||1.0006|
Additional tubing specification information can be found in K001-15a Standard Specification for Miniature Laser Welded and Drawn Stainless Steel and Nickel-Chromium Alloy Tubing for General Use on the K-Tube’s website at bit.ly/stainlesssteeltubing
K-Tube has the capability to make tubing with the below wall thickness and outside diameter combinations. Tubing with an OD/Wall ratio lower than 20:1 can be drawn to the final dimensions. Tubing with an OD/Wall ratio between 20:1 and 40:1 must be centerless ground to the final dimensions. Improvements to K-Tube's capabilities are constantly improving, please inquire if your dimensions are outside of the listed dimensions.
Download The I-625 K-Tube Stainless Steel Data Sheet
Download the I-625 K-Tube Stainless Steel Data Sheet (PDF) to easily share all the details on this page with your team.