Megamex is a metal supplier for hastelloy, monel, inconel, stainless steel, carbon steel, metal fabrication, nickel alloys, and more.

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Stainless Steel Products

Stainless Steel Flanges and FittingsStainless 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. 

Popular Stainless Steel Grades Available at Mega Mex


Grade

UNS Specification

Available Forms

Duplex 2205

S31803, S32205

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

LDX 2101

S32101

Plate, Sheet, Bar, Welding Products

Super Duplex 2507

S32750

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

Zeron 100

S32760

Plate, Bar, Pipe, Fittings, Welding Material

Duplex 2304

S32304

Plate

AL-6XN

N08367

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

904/L

N08904

Pipe

254 SMO

S31254

Bar, Pipe, Flanges and Fittings

253 MA®

S30815

Plate, Sheet, Bar, Pipe, Welding Material

321

S32100

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

409

S40900

Plate and Sheet

330

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

310/S

S31000/S31008

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

317/L

S31700/S31703

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

Alloy 20

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:

Stainless Steel Pipe and TubingFerritic 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

Stainless Steel SheetMartensitic 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

Stainless Steep CoilPrecipitation-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

Stainless Steel BarsSuperferritic

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