Stainless Steel
Characteristics:
- Corrosion resistant alloy.
- It contains a minimum of 10.5% chromium oxidation sufficient to avoid caused by free radicals (air, humidity).
- Does not rust.
Form or Presentation: Plate, sheet, bar, tube, tubing and welding material.
Stainless steels can be divided into 7 categories:
- Ferritic
– Its main component is chromium.
– Corrosion resistant.
– Generally contain between 10.5% and 27% of chromium and nickel.
– Ex 409, 410S, 430.
- Austenitic.
– Usually it is not magnetic.
– High hardness by cold working.
– Resistant to corrosion and wear.
– Highly machinable.
– It can contain up to 0.015% carbon, at least 16% chromium and nickel or manganese.
– AL-6XN eg, 254 SMO, 304, 316, 320, 321, 347, 309.
- Martensitic.
– Strong and resilient.
– Can sr hardened under heat tratatamiento.
– Machinable.
– Magnetics.
– Contains chromium (12-14%), molybdenum (0.2-1%), nickel (0 – <2%), carbon (0.1 – <1%)
– Ex 410, 420, 440..
- Duplex.
They are classified into three sub classes:
Duplex Magra
Duplex Standard
Superduplex
– Mixed microstructure of austenite and ferrite on a 50/50 mix.
– More and better resistance to corrosion cracking.
– Eg 2205 and 2207..
- Martensitic PH.
– Moldable.
– Can be hardened with heat treatment.
– Its main alloying elements are chromium and nickel.
– Corrosion resistant.
– Ex 17-4PH.
- Superausteniti.
– Same austenitic structure.
– Improved level of chromium, nickel, molybdenum, copper and nitrogen.
– Axis.
-AL-6XN and 254 SMO
- Super Ferritic.
– Structure and ferritic alloys like properties.
– The levels of chromium and molybdenum improve.
– Resistant to high temperatures and corrosive environments.
UNS S15500
It’s a precipitation hardening alloy.
UNS S30815
It belongs to the group of the austenitic stainless steels. Thin.
UNS S30400, S30403
Austenitic steel made of chromium-nickel.
UNS S31000 / UNS S31008
Heat and rust resistant alloy in conditions of 2000 F°
UNS S17400
Precipitation hardening martensitic stainless steel. Compound of chromium-nickel-copper.
UNS S17700
Semi austenitic stainless steel in the annealed condition but martensitic in quenched condition. Precipitation hardening.
UNS N08020
Also known by other names: Carpenter 20, IncoloyMR, Alloy 20. *Incoloy is a registrated brand from Special Metals Corporation.
UNS S32750
It’s a super duplex stainless steel used in applications that require exceptional strength.
UNS S31600 / S31603
Steel which belongs to the austenitic group. Compound mainly of chromium- nickel-molybdenum.
UNS S31703
Molybdenum as the main component with a low carbon “L” content which gives it resistance in welding and other thermal processes.
UNS S32100
Austenitic alloy with stabilized titanium which helps reduce or avoid the carbide precipitation during the welding processes and in serving conditions.
UNS N08330
Offers a combination of strength and resistance to carburation, rust (2100 °F), nitriding and thermal shock thanks to the silicon content.
UNS S34700, S34709
It’s composed of stainless steel- nickel-niobium stabilized austenitic chromium to use in temperatures higher than 850 °C (1560 ° F).
UNS S4100
Stainless steel which belongs to the martensitic group. Of Chromium.
UNS S43000, N 1.4016
Austenitic alloy with stabilized titanium which helps reduce or avoid carbide precipitation during the welding processes and in serving conditions.
UNS S31803, S32205
It combines the favorable qualities of a ferritic alloy (high resistance to stress corrosion) with the ones of an austenitic alloy (fabrication facility and resistance to corrosion).
the welding processes and in serving conditions.
UNS N08367
It belongs to the super austenitic group. Extremely resistant to chloride pitting and corrosion in general due to the concentration of its components: It contains nickel (24%), molybdenum (6.3%) and Nitrogen.