Stainless Steel Products

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.

Mega Mex is a stainless steel distributor of more than 20 grades of Stainless Steel.

Stainless Steel Products

Popular Stainless Steel Grades Available at Mega Mex

Grade UNS Specification Available Forms
S31803, S32205
Plate, Sheet, Bar, Pipe & Tube (welded & seamless), Fittings, Welding Material
S32750
Plate
S32750
Plate, Sheet, Bar, Pipe & Tube (welded & seamless), Fittings
S32760
Plate, Bar, Pipe, Fittings, Welding Material
Duplex 2304
S32304
Plate
N08367
Plate, Sheet, Bar, Pipe & Tube (welded & seamless), Fittings, Welding Material
904/L
N08904
Pipe
254 SMO
S31254
Bar, Pipe, Flanges and Fittings
S30815
Plate, Sheet, Bar, Pipe, Welding Material
S32100
Plate, Sheet, Bar, Pipe & Tube (welded & seamless), Fittings, Welding Products
409
S40900
Plate and Sheet
N08330
Plate, Sheet, Bar, Pipe (welded & seamless), Welding Products
347
S34700
Plate, Sheet, Bar, Pipe & Tube (welded & seamless), Fittings, Welding Products
309/S
S30900/S30908
Plate, Sheet, Bar, Pipe & Tube (welded & seamless), Welding Products
S31000/S31008
Plate, Sheet, Bar, Pipe & Tube (welded & seamless), Fittings, Welding Products
304, 304/L
S30400, S30403
Plate, Sheet, Bar, Pipe & Tube (welded & seamless), Fittings, Welding Products
304H
S30409
Plate, Bar, Pipe and Fittings
316/L
S31600, S31603
Plate, Sheet, Bar, Pipe & Tube (welded & seamless), Fittings, Welding Products
316H
S31609
Plate, Pipe and Fittings
333
N06333
Plate, Sheet & Welding Products
410/S
S41000, S41008
Plate, Sheet, Bar, Pipe
430
S43000
Sheet
15-5PH
S15500
Plate & Bar
17-4PH
S17400
Bar, Plate & Sheet
17-7PH
S17700
Bar
N08020
Plate, Sheet, Bar, Pipe & Tube (welded & seamless), Fittings, Welding Products

*Fittings include flanges, slip-ons, blinds, weld-necks, lapjoints, long welding necks, socket welds, elbows, tees, stub-ends, returns, caps, crosses, reducers, and pipe nipples.

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
Ferritic Stainless Steels

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
Martensitic Stainless Steels

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
Precipitation-Hardening Martensitic Stainless Steels

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
Superferritic