What is 440B stainless steel?
440B stainless steel is a high-carbon, martensitic stainless steel known for its exceptional hardness, wear resistance, and strength after heat treatment, making it suitable for applications like knife blades, surgical instruments, and high-wear parts. It achieves a high hardness of around Rockwell C 58-60 and offers moderate corrosion resistance, with properties similar to tool steels.
What material is 1.4112 equivalent to?
EN stainless steel grade 1.4112 is equivalent to AISI 440B (UNS S44003), a high-carbon martensitic stainless steel suitable for applications such as knives, surgical instruments, and tools. Its chemical designation, X90CrMoV18, describes its main alloying elements.
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440B (1.4112) Chemical Composition |
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| Grade | C | Mn | P | S | Si | Cr | Mo | V |
| 440B (1.4112) | %0.85-0.95 | %1.0 max | %0.040 max | %0.03 max | %1.00 max |
%17-19 |
%0.90-1.30 |
%0.07-0.12 |
Physical properties
Magnetisability: good
Density (kg/dm³): 7.7
Thermal conductivity (at up to 20°C): 15
Specific heat at 20°C (J/kg K): 430
Modulus of elasticity kN/mm² at 20°C: 215
Electronic resistance at room temperature (in Ω mm²/m): 0.80
Corrosion resistance
Due to its high chromium content, martensitic chromium steel AISI 440B/1.4112 has good corrosion resistance to non-chlorinated media such as water and water vapour in the quenched and tempered condition.
Is 440B stainless steel magnetic?
AISI 440B stainless steel, also known as 1.4112 and X90CrMoV18, is a martensitic chromium steel with a high carbon content. It is a magnetic steel with extremely high hardness and wear resistance, as well as good corrosion resistance. AISI 440B stainless steel (1.4112, X90CrMoV18) has a tensile strength of 750-950 N/mm² and a yield strength (R p0.2) of 550 N/mm².
Forgeability of 440B stainless steel
This material is not suitable for welding, but it exhibits good forging properties. Typical applications for this stainless steel (also known as tool steel) include the manufacture of cutting tools, such as various types of knives (in this case, blades and cutterheads), and surgical instruments.
What is the difference between 440B and 440C steel?
440B has a higher hardness and toughness than 440A and 440C for cutting tools, measuring tools, bearings and valves. The 440C has the highest hardness of all stainless steel and heat resistant steel for high quality cutting tools, nozzles and bearings. 440F is a free-cutting steel and mainly used in automatic lathes.
Is 440B a good knife steel?
Is 440B a knife steel? With a lower carbon content than others out of the 400 series of stainless steels the 440B can be sharpened very well as it is softer but will not hold an edge as well. However it still has a good balance of toughness, corrosion resistance and edge retention.
If you have a project need for 440B stainless steel bar, we welcome your order. GNEE has a large inventory of popular products for you to choose from. We process these products into a variety of practical product forms, including sheet, coil, tube, bar, and wire. For detailed chemical composition and free samples, please contact our factory today. We offer competitive pricing and excellent service.Mail:es@gescosteel.com
