Fittings and Flanges

Fittings and Flanges

SS 446 Fittings and SS 446 Flanges or UNS S46600 is a ferritic stainless steel which provides good resistance to high temperature corrosion and oxidation. SS 446 is a high chromium ferritic heat resistant alloy which has excellent resistance to sulfidation, oxidation and other forms of hot corrosion.

Chemical properties for SS 446

GRADE

 

Cr

Mn

Si

Ni

C

P

S

Fe

SS 446

MIN

23

 

   

MAX

27

1.5

1

0.25

0.2

0.04

0.03

BALANCE

Stainless steel 446 Grade pipe fittings and flanges are the most corrosion resistant steel amongst the 400 series stainless steels. Its resistance to cyclic corrosion is equivalent to or superior to Type 309 and Type 310 steels.

Mechanical Properties

Grade

Tensile Strength

Yield Strength

Elongation

[MPA]

[MPA]

(% in 50mm) min

SS 446

485

275

20

Ferritic stainless steels 446 have useful resistance to mild atmospheric corrosion and most fresh waters. SS 446 grade is non-hardenable but has excellent corrosion resistance at very high temperatures. 

Physical Properties

Grade

Density (g/cm3)

Elastic Modulus (GPa)

Coeff of Thermal Expansion (μm/m/°C)

Thermal Conductivity (W/m.K)

0-100°C

SS 446

7.8

200

10.4

21.6

Specification of Flange 

The specified ASTM Standard Specification for Wrought Martensitic SS 446 Flanges is ASTM A182 with manufacturing standard such as ANSI/ASME B16.5, B16.48, BS4504, B 16.47 Series A & B, BS 10, EN-1092, DIN, etc.

According to application and uses in pipes and tubes SS 446 flanges are broadly grouped into different sort, for example, Welding Neck Flange(WNF) & Long Welding Neck Flange(LWNF), Slip-on Flange(SOF), Lap Joint Flange(LJW), Blind Flange, Socket Welding Flange (SWF), Threaded Flange(THW), Plate Flange.

SS 446 Flanges for the most part has different  face type, for example, Flat Face (FF), Raised Face (RF), Ring Type Joint (RTJ), blind flange, with various class rating as 50 LBS, 300 LBS, 600 LBS, 900 LBS, 1500 LBS, 2500 LBS, DIN Standard ND-6,10, 16,din 2.4856 , 25, 40 & ANSI B16.5.

Specification of Fittings

The Specification for Wrought Martensitic SS 446 Fittings is ASTM A403, having Specific manufacturing Standards as ASME/ANSI B16.9, ASME B16.28, MSS-SP-43. 

SS 446 Fittings are categorically available are Elbow, Reducer, Tee, Coupling, Bend, Stub End, Cap, Nipple, Washer, Cross, Union etc which are available in different  types such as Welded, Seamless and Fabricated having thickness range from 5s, 10s, 40s, 80s, 10, 20, 40, STD, 60, 80, XS, 100, 120, 140, 160, XXS available with NACE MR 01-75

Applications

SS 446 is a high chromium ferritic heat resistant alloy which has excellent resistance to sulfidation, oxidation and other forms of hot corrosion. It is used in various applications including Recuperators, Neutral salt pot electrodes, Spouts for conveying molten copper alloys, Oil burner parts, Combustion chambers.

  • Off-Shore Oil Drilling Companies
  • Power Generation
  • Gas Processing
  • Specialty Chemicals
  • Pharmaceutical Equipment
  • Chemical Equipment
  • Heat Exchangers
  • Condensers
  • Pulp and Paper Industry