Its hardness and strength also make it suitable for the production of cutting tools, such as knives and blades. 440c stainless steel is martensitic, which implies that it is hardenable by heat treatment. Best resistance in the hardened and tempered and passivated condition. The applications of martensitic steels are limited by the loss of strength caused by over-tempering at high temperatures, and loss of ductility at temperatures below zero. Penn Stainless inventory now includes Alloy 440C (UNS S44000) in sheet, sheet coil, plate, round bar, processed flat bar and tubular products. Grade 440 stainless steels should not be used at temperatures below the relevant tempering temperature, due to loss of mechanical properties caused by over-tempering. It has the highest carbon content among them. x��ZY��~��P�3�����`��[�A�� A smooth polished surface also assists. Its very high carbon content is responsible for these characteristics, which make 440C particularly suited to such applications as ball bearings and valve parts. The standout properties of this type of steel are its hardness, mechanical strength and fatigue resistance. With its high carbon content 440C annealed stainless … If these grades are hardened machining becomes more difficult and probably impossible. ��r�[��&Zyk�"a#�i��m����ZK��z�9��۵=*�\1�pL�R`hh�'4�i����_��� ���߷��`�~H� ��j���9����9I���L��`z�B
h�e� W{�m\0Cu2��DX�. Stay up to date with the latest from Penn Stainless. I'm using 440C to produce a knife blade. Building Formula One’s First Natural Fiber Composite Racing Seat, Multistep Synthesis Followed via Benchtop NMR, Optimised OEM Chromatography Detectors & Systems, Quantum Microscope System Developed on HORIBA AFM Technology: ProteusQ, High-Performance Nanoscale FT-IR Spectroscopy, Automated Compression, Tensile, and Flexure Testing: AT2 Automated XY Stage, Think20 Labs Addressing Regulatory Challenges for Pesticides in Cannabis, Researchers Successfully Modify a Semiconductor to Create a Superconductor, Novel, Green Materials Could be Useful for Indoor Light Harvesting, Researchers Analyze Two Liquid States of Water Using X-Ray Lasers, A New Method to Print Solid-State Electrolyte Films for Next-Generation Batteries, Durable Electrocatalyst Helps Improve Hydrogen Fuel Production, Determining Stability-Based Value of Natural Oils with the Rancimat Test, The Influence of Flow Additives on Powder Behavior, An Introduction to Particle Analysis Software, Science Meets History: Conservators at The Mariners' Museum and Park Use SEM Data to Help Direct Conservation Efforts. Possible Alternative Grades
© 2020 Matmatch GmbH, All rights reserved. Tempering in the range 425-565°C is to be avoided because of reduced impact resistance and corrosion resistance. The steel is again heated to a temperature between 1010. However, care must be taken to avoid over-tempering, which results in a decline in its corrosion resistance. 440C stainless steels typically have a composition of 78 – 83.1% iron, 16 – 18% chromium, 1 – 1.2% carbon, 1% (max) silicon, 1% (max) manganese, 0.8% molybdenum, 0.04% phosphorus and 0.02% sulphur. A smooth polished surface also assists. Its excellent wear resistance makes it suitable for the production of valve components and ball bearings with industry-standard requirement Rockwell hardness of 58. stream
Heat Treatment
Properties of annealed 440c stainless steel [2], Full annealing is done at a temperature range between 850, 900 °C, after which it is slowly cooled in the furnace to about 600 °C and then air-cooled to room temperature. Grade 420 filler will give a high hardness weld (although not as high as the 440C), but 309 or 310 will produce soft welds with higher ductility. The corrosion resistance of grade 440C approximates that of grade 304 in many environments. Highest resistance can be achieved through hardening and polishing, and the properties of 440C steel make it ideal for knife blades and cutting instruments like surgical blades. 785 °C (sub-critical annealing) and then slowly cooled in the furnace until room temperature. %��������� Grade 440C is capable of attaining, after heat treatment, the highest strength, hardness and wear resistance of all the stainless alloys. 1 0 obj
Oil quenching is usually carried out for heavy sections. This combination of properties makes it useful in the production of cutting tools. It is magnetic both in its pre-hardened and post-hardened states. We want to use in Effluent Treatment plant which is quite corrosive. Corrosion Resistance Heat Resistance Heat Treatment Welding Machining Applications. If welding is necessary pre-heat at 250°C and follow welding with a full anneal. 190 Kelly Road I have the shape, grinds and polishing completed but am unsure how to heat treat such a small item - 75mm X 3mmAny advice would be appreciated!