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SS440c | X105CrMo17
Key Features
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Can be hardened to the highest strength of any stainless steel (up to ~60 HRC)
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High carbon martensitic stainless steel
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Good corrosion resistance in mild environments
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Suitable for applications requiring both strength and corrosion resistance
Size Range
Round Bar
80 mm To 300 mm Diameter
Flat Bar
80mm*80mm To 350mm*210mm
About the Steel
SS440C stainless steel is a high-carbon martensitic grade known for its exceptional hardness and wear resistance after heat treatment. It offers moderate corrosion resistance, making it suitable for applications exposed to mild corrosive environments. While it provides the highest strength among stainless steels, its toughness is lower compared to austenitic grades. SS440C is widely used in precision components, bearings, surgical tools, and cutting instruments where hardness and durability are critical.
Applications
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Cutlery & Surgical Instruments
Used in knives, scalpels, and precision blades requiring sharpness and durability.
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Bearings & Valves
Applied in high-load bearing surfaces and valve components for wear resistance.
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Aerospace & Automotive
Utilized in critical parts like ball bearings, shafts, and engine components.
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Industrial Tools & Dies
Preferred for cutting tools, gauges, and dies requiring high hardness.
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Measuring Instruments
Used in precision tools where dimensional stability and strength are essential.
Manufacturing
Process flow for manufacturing 440c steel
Melting
Ingots melted in EIF, impurities fully killed and followed LRF and VD process at Client's request. Ingots annealed
Forging
Press or Hammer Forged with reduction ratio of 2.5 to 3.5 times
Heat Treatment
Full annealing cycle post forging or any special QT process as per Client's TDC
Quality Test
Ultrasonic, Hardness, Mechanical, Microstructure testing of the metal at a NABL approved lab
Proof Machining
Proof machining of Forged Rounds and Flats as per Client's requirements
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