Steel for knives 90X18mf

Technical characteristics

Stainless chromium steel 90X18MF is manufactured in accordance with GOST: 5949-75 and 5632-72, as well as technical specifications: 14-1-4628-89 и 14-1-1848-75. Steel 90X18MF is used to produce bars and strips by forging or rolling. Hot deformation is carried out at 1130-950°C followed by tempering at 750°C and cooling. This steel alloy in a hardened state is used in the chemical industry, the production of pumps, cutting tools in the food industry and medicine. The price is the best in this segment of rolled products.

Percentage composition of 90X18MF (5632-72)

Production

This steel grade is a martensitic alloy. It is melted in induction and open electric arc furnaces as well as in vacuum induction furnaces with final vacuum-arc remelting. Plastic deformation is carried out in the temperature range of 1100-900°С. Sections are produced by drawing, and sheets by rolling. In the case of rapid cooling, cracking is possible. The hardening temperature is 1045 °C and the tempering temperature is 200 °C. Hardening hardens the material as a result of the martensitic transformation. The structure of grained pearlite is given by annealing, after quenching the hardness of steel is 197-207 ^NV-1. Increasing the quenching temperature increases the proportion of residual austenite, the optimum hardness is reached at 1050 °C.

Physical properties (temperature 20°C)

- Specific gravity 7.67 ^g/cm3

- Thermal conductivity 0.147 - 10² W/(m - K).

- Modulus of elasticity 18 - 10 - ^{4 N/mm2}

- Electrical resistivity 0.68 ^Ohmxmm2/m

- The hardness of the steel is 200 NV MPa-1.

- Specific heat capacity is 0.483 - 103, J/(kg - K);

- Magnetic permeability in a 500 E field is 1.255 microTesla/m.

Corrosion rate

- in moist ammonia and hydrogen sulphide atmosphere up to 0.005 mm/year;

- in _{H2 S2} solution at a saturation of 2.5 g/l - up to 0.0135 mm/year;

- in _NH3 aqueous solution (t° 20 °C) up to 0.006 mm/year; and at 90 °C up to 0.097 mm/year;

- in a mixture of aliphatic hydrocarbons (t° 20-90 °C) - up to 0.003 mm/year.

Use

The method of forging or rolling produces sections and strips of steel, which are used in the medical and food industries. Rolled steel in hardened condition is used in the manufacture of chemical valves, gear pumps multistage pumps for metered delivery of the preparative environment, in the manufacture of cutting tools (according to GOST R 50 328.1-92). Products made of this steel meet high requirements to corrosion resistance and are able to withstand multiple heat treatment that is important for medical instruments. They can be processed in washing machines, they do not lose their properties in chlorinated water.

Competitive price to buy

Where to buy stainless steel for knives 90X18MF in bulk or in installments? Supplier "Auremo" offers to buy stainless steel for knives 90X18MF, the price is the best in this segment of rolled products. There is a wide selection of products in stock. We guarantee favorable conditions for retail and wholesale customers. Buy stainless steel for knives 90X18MF is easy by contacting your nearest office. Order the "Callback" service and the company manager will help you choose the product that best meets your requirements. Buy today. We offer the best quality-price ratio.