440M (1.4116N) stainless steel is a material produced by the French Ugitech brand. This material, which is of French origin internationally, is an original designed material that has been developed differently among its counterparts. In general terms, 440 M stainless steel; It is defined as an advanced version of 440 B (1.4112) and 440 C (1.4125) quality stainless steels.
Compared to these counterparts, 440 M (1.4116N) stainless steel offers higher performance in terms of corrosion resistance and machinability, and is also renowned for its ability to reach very high hardness levels after heat treatment. At the center of the development of 440 M were 440 A and 440 C grades.
440 M (1.4116N), developed by the French Ugitech factory, was created by adding Nitrogen to the content of 440 A (1.4112) 440 C (1.4125) materials. The material, which can gain hardness at approximately 57-60 HRC levels in case of heat treatment after forging, is similar to 420 (1.4034) stainless steel in terms of machinability in terms of its general structure.
Corrosion Resistance (* * *)
440M (1.4116N) grade stainless steel has a very high carbon content. Therefore, it cannot show a high corrosion resistance in environments where corrosion conditions are severe. Although it cannot perform well in terms of corrosion in terms of its own capabilities, its corrosion resistance is quite high compared to its counterparts.
Mechanical Properties (* * *)
440M (1.4116N) grade stainless steel shows standard mechanical properties after annealing. However, after heat treatment, the mechanical capabilities of 440M (1.4116N) quality stainless steel can reach very high levels. It performs at a much higher level than its counterparts in terms of surface hardness and it is difficult to be subjected to re-processing after receiving the hardness level.
Malleability (*)
440M (1.4116N) grade stainless steel, which contains high levels of carbon, does not perform successfully in terms of malleability. Especially after heat treatment, forging is not recommended in terms of breakability due to the very high carbon content. For this reason, steel of this quality should be shaped and forged after annealing and then strengthened by heat treatment while in its final form. These features, which are very advantageous in the production of knives and drill bits, make 440M (1.4116N) grade stainless steel one step ahead in this respect.
Weldability Feature (*)
Stainless steels with a high carbon content will produce carbides when welded. Perhaps one of the materials where this situation can occur most severely is 440M (1.4116N) grade stainless steel, because the carbon content in terms of the component is quite high. In this respect, 420 grade stainless steel, which is similar with its close properties, may be preferred where the welding process requirement is high.
Machinability Feature (* * * *)
When we consider its machinability in general, we see that 440M (1.4116N) grade stainless steel has similar properties and capabilities with 420 grade stainless steel. 440M (1.4116N) grade stainless steel, whose machinability is at a good level in this respect, shows a better performance compared to its counterparts 440B (1.4112) 440C (1.4125) steels.
Since the carbon content is high, the chips of the steel are easily broken and chip wrapping is minimized during the machining process.
440M (1.4116N) Stainless Steel Uses
Structurally developed from 440B (1.4112) and 440C (1.4125) grade stainless steels, 440M (1.4116N) stainless steel is generally used in environments where high surface hardness is required.
440M (1.4116N) grade stainless steel, which is especially advantageous in knife production and can have a hard superficial texture, can also be used in drill bits, medical coins and environments with high friction wear.
440M Steel Material List (Immediate Delivery from Stock)
Stainless Steel Rod: Min Diameter: 5 -Max Diameter: 110mm
Other size ranges available (within 2.5-3 weeks)
Stainless Steel Bar in 440B (1.4112) and 440C (1.4125): Min Diameter: 4mm -Max Diameter: 400mm
Other size ranges available (within 1 day)
Stainless Steel Plate (Blade material) 440C (N695) and N690: Min Edge: 1.6mm -Max Edge: 7mm Chemical Composition Grade: 440M /1.4116N)
Mechanical Properties at Room Temperature Grade:
440M (1.4116N) X50CrMoV15 Breaking strength: 650MPa (min)
Yield strength before heat treatment, (0.2%): Min 350MPa (min)
Hardness, Rockwell (HRC) before heat treatment: ~57-60 HRC (After heat treatment.)
Physical Properties at Room Temperature Self-mass (Specific gravity): 7700 kg/m³ Young's Modulus: 215000 N/mm² Electrical resistivity: 0.065x10^-6 Ωm Thermal conductivity: 30 W/m.K
Quality Properties
The 440M model is coded as 1.4116N in EN standards. The 440M model product is also coded as X50CrMoV15 in EN standards. This quality steel is known for its hardness of 57-60 HRC after heat treatment.
This stainless steel belongs to the martensitic stainless group with integrated nitrogens. Materials with the quality of the products have better machinability than the 420 model. Since stainless steels of this quality do not contain nickel, they can be magnetized. (After heat treatment, magnetism can drop to significantly lower levels and the material may become non-magnetizable).
440M Quality Stainless Steel Alternatives
(1.4112): Although 440 B has a lower profile than 440M in all specifications, it can be used as an alternative when grade 440M stainless steel is not available on the market.
440C (1.4125): Generally weaker than 440M in terms of both corrosion and brittleness, 440C stainless steel is more advantageous in terms of hardness, so it can be chosen as an alternative to 440M when high hardness is sought.
420 (1.4034): 1.4034, one of the rare versions of 420 grade, has a very high hardness level, but its corrosion resistance is not similarly good. It can be an alternative but may not be easily available.
420 (1.4021): This 420 grade is a very widely used and available steel grade. It is preferable to 440M steel where lower hardness requirements are required and cost reduction is desired.
