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  • ASTM B366 WP20CB tee

ASTM B366 WP20CB tee

  • Material:ASTM B366 WP20CB
  • production:Equal Tee
  • Production standards:ASME B16.9



ASTM A 265, B 366, B 463
B 464, B 471, B 472, B 473
B 474, B 475
UNS N08020
Other common names: Carpenter 20, 20Cb-3®, Incoloy® alloy 20

Alloy 20, also known as Carpenter 20, is a nickel-iron-chromium austenitic alloy that was developed for maximum resistance to acid attack, specifically sulfuric acid. Thissuperalloy has excellent resistance to general corrosion, pitting, and crevice corrosion in chemicals containing chlorides and sulfuric, phosphoric, and nitric acids. It also contains niobium for stabilization against sensitization and resultant intergranular corrosion. Carpenter 20 combines excellent corrosion resistance with elevated mechanical properties and relatively easy fabrication. Although originally designed for use in sulfuric acid related industries, Alloy 20 is now a popular choice for a wide variety of industries including the chemical, food, pharmaceutical, and plastics industries. In addition, this superalloy is used in heat exchangers, mixing tanks, metal cleaning and pickling equipment, and piping.
There has long been a debate on whether Carpenter 20 is a stainless steel or a nickel alloy because the nickel content is right on the border of defining it as one way or the other. So, depending on who you talk to this alloy may be referred to as alloy 20 Stainless Steel or as a nickel alloy. Either way it is still great for corrosion resistance.
In what forms is Alloy 20 Available?
• Sheet
• Plate
• Bar
• Pipe & Tube (welded & seamless)
• Fittings (i.e. flanges, slip-ons, blinds, weld-necks, lapjoints, long welding necks, socket welds, elbows, tees, stub-ends, returns, caps, crosses, reducers, and pipe nipples)
• Wire

What are the characteristics of Alloy 20?
• Excellent general corrosion resistance to sulfuric acid
• Excellent resistance to chloride stress corrosion cracking
• Excellent mechanical properties and fabricability
• Minimal carbide precipitation during welding
• Excels in resisting corrosion to hot sulfuric acids
Chemical Composition, %
Ni Fe Cr Cu Mo Nb
32.00-38.00 Balance 19.0-21.0 3.0-4.0 2.0-3.0 8xC-1.0max
C Mn P S Si
.07max 2.0max .045max .035max 1.0max
In what applications is Alloy 20 used?
• Synthetic rubber manufacturing equipment
• Processing of pharmaceuticals, plastics and organic and heavy chemicals
• Tanks, piping, heat exchangers, pumps, valves, and other process equipment
• Acid cleaning and pickling equipment
• Chemical process piping, reactor vessels
• Bubble caps
• Petrochemical process equipment
• Food and dye production
ASTM Specifications
Pipe Smls Pipe Welded Tube Smls Tube Welded Sheet/Plate Bar Forging Fitting
B729 B464 B729 B468 B463 B473 B462 B366
Mechanical Properties
Annealed Material
Form Tensile Min. Yield Min. (.2% offset) Elongation Min. Reduction of Area Min.
Bar (hot or cold finished) 80 ksi 35 ksi 30% 50%
Sheet/Plate 80 ksi 35 ksi 30% -
*Incoloy® is a registered trademark of Special Metals Corporation group of Companies.
Standard Type Size
ASME B16.9

Long Radius Elbows,

Long Radius Reducing Elbows,

Long Radius Returns,

Short Radius Elbows,

Short Radius 180° Rerurns,

3D Elbows,

Straight Tees,

Straight Crosses,


Outlet Tees,

Reducing Outlet Crosses,

Lap Joint Stub Ends,


Size:1/2"-48" Wall Thickness:SCH5S-SCHXXS
ASME B16.28

Short Radius Elbows,

Short Radius 180° Returns

Size:1/2"-24" Wall Thickness:SCH5S-SCHXXS
ASME B16.49

30° 45° 60° 90° Long Radius 

Short Radius Bend

Size:1/8"-12" Wall Thickness:SCH5S-SCHXXS

Long Radius Elbows,

Straight and Reducing-on-the-Outlet Tees,

Lap Joint Stub Ends,


Long Radius 180° Returns,

Concentric Reducers,

Eccentric Reducers

Size:1/2"-24" Wall Thickness:SCH5S-SCHXXS

Long Radius Elbows,

3R Elbows,

Straight Tees,

Reducing Outlet 


Size:16"-60" Wall Thickness:SCH5S-SCHXXS

All Kind of Buttwelding Products 

or As Per Client's Drawing

As the Client's Demand
Material Standard Nickel Alloy

ASTM/ASME SB 366 Alloy 200/UNS N02200, 

Alloy 800HT/Incoloy 800HT/UNS N08811, 

Alloy 400/Monel 400/UNS N04400,

Alloy 800/Incoloy 800/UNS N08800, 

Alloy C-2000/UNS N06200, 

Alloy 925/Incoloy 925/UNS N09925, 

Alloy C-22/UNS N06022, 

Alloy 201/UNS N02201, 

Alloy C-276/Hastelloy C-276/UNS N10276,

Alloy 625/UNS N06625, 

Nimonic 80A/Nickel Alloy 80A/UNS N07080, 

Alloy K-500/Monel K-500, 

Alloy 20/UNS N08020, 

Alloy 800H/Incoloy 800H/UNS N08810

,Alloy 600/Inconel 600/UNS N06600, 

Alloy 31/UNS N08031,

Alloy 825/Incoloy 825/UNS N08825

Carbon Steel ASTM/ASME SA 234 WPB
Low Alloy Steel


WP11, WP22, WP9,

Low Temp Carbon steel ASTM/ASME SA420 WPL3-WPL 6
Duplex and Super Duplex Steel

ASTM/ASME SA 815 WPS31803, 

WPS32205,  WPS32750, 

WPS32760, WPS32550

Stainless Steel

ASTM/ASME SA403 WP 304, WP 304L, 

WP 304H, WP 304LN, WP 304N, 

ASTM/ASME A403 WP 316, WP 316L, 

WP 316H, WP 316LN, WP 316N, WP 316Ti,

ASTM/ASME A403 WP 321, 

WP 321H ASTM/ASME A403 WP 347,

WP 347H, WP 904L

High Strength Ferritic Steel


WPHY 46, WPHY 52, 

WPHY 60, WPHY 65, WPHY 70


ASTM/ASME SB337 Grade 1,

Grade 2, Grade 11, Grade 12

Cu Ni Alloy


UNS C70600 Cu/Ni 90/10

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