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Stainless Steel

/main-products/titanium/

Stainless steel is a corrosion resistant steel alloy with a minimum of 10.5% chromium. There are different grades and surface finishes of stainless steel produced to accommodate the environment in which the material will be implemented. Unlike carbon steel, stainless steel does not rust when exposed to air and moisture due to the sufficient amount of chromium present. The chromium creates an invisible passive film of chromium oxide that will not let oxygen attack the surface and prevents rusting of the iron base.

Popular Stainless Steel Grades Available at Anton

Grade

UNS Specification

Available Forms

Duplex 2205

S31803, S32205

Plate, Sheet, Bar, Pipe, Strip, Foil & Tube (welded & seamless)

LDX 2101

S32750

Plate, Bar, Strip, Foil

Super Duplex 2507

S32750

Plate, Sheet, Bar, Pipe, Strip, Foil & Tube (welded & seamless)

Zeron 100

S32760

Plate, Bar, Pipe, Strip & Foil

Duplex 2304

S32304

Plate, Bar, Pipe, Strip & Foil

AL-6XN

N08367

Plate, Sheet, Bar, Pipe,  Strip, Foil & Tube (welded & seamless)

904/L

N08904

Plate, Bar, Pipe, Strip & Foil

254 SMO

S31254

Plate, Bar, Pipe, Strip & Foil

253 MA®

S30815

Plate, Bar, Pipe, Strip & Foil

321

S32100

Plate, Bar, Pipe, Strip, Foil & Tube (welded & seamless)

409

S40900

Plate, Bar, Pipe, Strip & Foil

330

N08330

Plate, Sheet, Bar, Pipe, Strip, Foil & Tube (welded & seamless)

347

S34700

Plate, Sheet, Bar, Pipe, Strip, Foil & Tube (welded & seamless)

309/S

S30900/S30908

Plate, Sheet, Bar, Pipe, Strip, Foil & Tube (welded & seamless)

310/S

S31000/S31008

Plate, Sheet, Bar, Pipe & Tube (welded & seamless), Fittings, Welding Products

304, 304/L

S30400, S30403

Plate, Sheet, Bar, Pipe & Tube (welded & seamless)

304H

S30409

Plate, Sheet, Bar, Pipe, Strip, Foil & Tube (welded & seamless)

316/L

S31600, S31603

Plate, Sheet, Bar, Pipe, Strip, Foil & Tube (welded & seamless)

316H

S31609

Plate, Sheet, Bar, Pipe, Strip, Foil & Tube (welded & seamless)

333

N06333

Plate, Sheet & Bar

410/S

S41000, S41008

Plate, Sheet, Bar, Pipe, Strip, Foil & Tube (welded & seamless)

430

S43000

Plate, Sheet, Bar, Pipe, Strip, Foil & Tube (welded & seamless)

15-5PH

S15500

Plate, Sheet, Bar, Pipe, Strip, Foil & Tube (welded & seamless)

17-4PH

S17400

Plate, Sheet, Bar, Pipe, Strip, Foil & Tube (welded & seamless)

17-7PH

S17700

Plate, Sheet, Bar, Pipe, Strip, Foil & Tube (welded & seamless)

Alloy 20

N08020

Plate, Sheet, Bar, Pipe, Strip, Foil & Tube (welded & seamless)

Stainless steels can generally be categorized into 7 categories:

Ferritic Stainless Steels
· Chromium is their major alloying element
· Ductility and formability less than austenitic grades
· Magnetic
· Highly corrosion resistant, less durable than austenitic
· Cannot be hardened by heat treatment
· Contain between 10.5%-27% chromium and very little nickel
· Common grades: part of the 400 series like 409, 410S, 430

Austenitic Stainless Steels
· Comprise of 70% of total stainless steel production
· Hardenable by cold working
· Usually non-magnetic
· High hardness and yield strength
· Contain a maximum of 0.015% carbon, minimum of 16% chromium and sufficient nickel and/or manganese
· Superaustenitic stainless steels (AL-6XN and 254 SMO)  have great resistance to chloride pitting and crevice corrosion
· Common grades: 300 series like 304, 316, 320, 321, 347,309

Martensitic Stainless Steels
· Highly machinable
· Very strong and tough
· Can be hardened by heat treatment
· Magnetic
· Contains chromium (12-14%), molybdenum (0.2-1%), nickel, (0 – < 2%), carbon (0.1 – < 1%)
· Common grades: 410, 420, 440

Duplex Stainless Steels
· Often divided into 3 sub classes
· Lean Duplex
· Standard Duplex
· SuperDuplex
· Mixed microstructure of austenite and ferrite about a 50/50 mix
· Higher strength and better stress corrosion cracking resistance than most austenitic alloys
· Greater toughness than ferritic alloys, especially at low temperatures
· Good resistance to localized corrosion, particularly pitting, crevice corrosion and stress corrosion cracking
· Common grades: 2205 and 2507

Precipitation-Hardening Martensitic Stainless Steels
· Designed to be formable in the solution annealed condition
· Can be hardened by heat treatment
· Contain chromium and nickel as major alloying elements
· Corrosion resistance is usually better than that of straight chromium ferritics
· Most common grade is 17-4PH

Superaustenitic Stainless Steels
· Same structure as austenitic alloys
· Enhanced levels of elements like chromium, nickel, molybdenum, copper and nitrogen
· Superior strength and corrosion resistance
· Common Grades: AL-6XN and 254 SMO

Superferritic
· Structure and properties similar to ferritic alloys
· Enhanced levels of chromium and molybdenum
· Increased resistance to high temperatures and corrosive environments like seawater