Martensitic stainless steel
- Carbon low alloy construction steel
- Heat treatable engineering steel
- Case-hardening alloy steel
- Structural alloy spring steel
- Aviation and aero steels
- Boiler alloy and low alloy steel
- Bearing alloy structural steel
- Wear resistance manganese steel - Hadfield steel
- Heat resistant and valve steel
- Structural alloy steel for nitriding
Stainless martensitic and precipitation hardening steel
- X12CrS13
- AISI 416
- X12Cr13
- AISI 410
- X20Cr13
- AISI 420
- X30Cr13
- AISI 420F
- X46Cr13
- UNS S42080
- X50CrMoV15
- X20CrMo13
- Z20CD14
- X14CrMoS17
- AISI 430F
- X39CrMo17-1
- 420Mod
- X105CrMo17
- AISI 440C
- X90CrMoV18
- AISI 440B
- X70CrMo15
- AISI 440A
- X17CrNi16-2
- Z15CN17-03
- 1.4044
- X3CrNiMo13-4
- F6NM
- AISI 415
- UNS S41500
- X4CrNiMo16-5-1
- S165M
- Z8CND17-04
- X5CrNiCuNb16-4
- 17-4PH
- X5CrNiCuNb17-4-4
- 17-4PH
- X5CrNiCuNb15-5
- 15-5PH
- UNS S15500
- XM-12
- X8CrNiMoAl15-7-2
- 15-7PH
- UNS S15700
- X7CrNiAl17-7
- 17-7PH
- UNS S17700
- X1CrNiMoAl12-9
- PH13-8Mo
- 13-8Mo
- AMS 5629
- CrNiMo13-5-2
- 1.4415
- X2CrNiMoV13-5-2
- S41426
- S41425
Stainless martensitic and precipitation hardened steel - characteristics and chemical composition
For more demanding applications in components and parts geared towards hardness, abrasion resistance, good hardenability, they are used resistant to martensitic corrosion steels. In relation to stainless steel, austenitic stainless and ferritic stainless, in these grades the carbon content is much higher, from 0.08 to 1.20%.
These steels are characterized by quite high corrosion resistance and at the same time retain the mechanical properties of structural carbon steels and in many cases tool steel. Like ferritic steels, they contain between 11% -19% Chromium, and Molybdenum - Mo, Vanadium - V, Copper - Cu, Nickel - Ni, Niobium - Nb, Nitrogen - N, Titanium & Aluminum - Ti and Al.
Martensitic steels - heat treatment
Supplied in most cases in the softened condition of delivery, in order to utilize their mechanical properties, a heat treatment consisting of hardening and tempering should be carried out. At a high temperature of about 1000-1100 ℃, the austenite is susceptible to hardening after cooling in the air so that the structure of the material is transformed into a martensite structure, where the next step is tempering. These steels have a strength of up to 1100 Mpa.
Hardening is carried out in the temperature range of 900-1100 ℃, tempering in the range of 200-800 ℃ depending on the grade. In relation to high-chromium steels, stainless martensitic steels do not exhibit relatively higher corrosion resistance, and the example is popular 4H13 steel.
Stainless martensitic bars and sheets - use
Martensitic stainless steels also belong to the group of magnetic steels, are not suitable for welding, and have limited ability to stamping or cold bending. They are used for the construction of easily replaceable non-weldable components as: steels for kracking equipment and pipes in the oil industry, steels for the manufacture of shafts for pumps, bolts, steels for the nitriding equipment, household items, steels for turbine and steam turbines, cutting tools, permanent for the rectification columns, constant for the valves of the engines and elements of the hydraulic presses, chokes, steels for molds for pressure casting, steels for working in the sea and water atmosphere (eg. H17N2), steels for making knives as well as steels for manufacture of rolling bearings.