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Stainless Steel 321/321H Pipe Fittings

Chemical Composition %

C

Cr

Mn

Ni

P

S

Si

Ti

Max

 

Max

 

Max

Max

Max

 

0.08

17.0-20.0

2.0

9.0-13.0

0.04

0.30

0.75

Trace *

* The titanium content shall not be less than 5 times the carbon content and not more than 0.60% Note: 321 H requires the titanium content to be not less than 4 times the carbon content and not more than 0.60%

AVAILABILITY
Seamless Pipe 1/4" - 24"
Weld Pipe 1/2" - 60"
Seamless Butt-Weld Fit. 1/2" - 24"
Welded Butt-Weld Fit. 1/2" - 60"
Threaded Fittings 1/4" - 4"
Forged Fittings 1/4" - 4"
Outlets 1/4" - 24"
Flanges 1/2" - 60" 

SPECIFICATlONS
ASTM  - A312, A403, A182, A479, A276
ASME  - SA312, SA403, SA182, SA479, SA276

DESCRIPTION
These titanium bearing stainless steels are stabilized against carbide precipitation and designed for operation within the damaging temperature range where carbide precipitation develops. In this type of steel, the carbon combines preferentially with titanium to form a harmless titanium carbide, leaving the chromium in solution to maintain full corrosion resistance. Type 321 is basic type 304 modified by adding titanium in an amount at least 5 times the carbon plus nitrogen contents.

DESIGN FEATURES
• Immune to intergranular corrosion when heated within the carbide precipitation range.
• Titanium addition eliminates the formation of chromium carbides at the grain boundaries by tying up the carbon and nitrogen as titanium carbides or nitrides.
•Better high temperature properties than 304 or 304L. Generally used for parts which are intermittently heated up to 1500 deg.F. For continuous service the alloy is good to 1650 deg.F.
• May be susceptible to chloride stress cracking.
• Excellent weldability in field.
• Type 321 H has high carbon (.04 - 10) for better high temperature creep properties.

TYPICAL APPLICATIONS
High temperature chemical process heat exchanger tubes Refineries High temperature steam service

TENSILE REQUIREMENTS
Tensile Strength (KSI) 75
Yield Strength (KSI) 30
KSI can be converted to MPA (Megapascals) by multiplying by 6.89.

SS 321 45 Degree Elbow   SS 321 90 Degree Elbow   SS 321 180 Degree Elbow   SS 321 Equal Tee
SS 321 45 Degree Elbow
SS 321 90 Degree Elbow
SS 321 180 Degree Elbow
SS 321 Equal Tee
SS 321 Unequal Tee   SS 321 Barred Tee   SS 321 Concentric Reducer   SS 321 Eccentric Reducer
SS 321 Unequal Tee
SS 321 Barred Tee
SS 321 Concentric Reducer
SS 321 Eccentric Reducer
SS 321 Lateral   SS 321 Y   SS 321 Long Radius Bend   SS 321 Long Stubend
SS 321 Lateral
SS 321 Y
SS 321 Long Radius Bend
SS 321 Long Stubend
SS 321 Short Stubend   SS 321 Cap   SS 321 Swage Nipple   SS 321 Barrel Nipple
SS 321 Short Stubend
SS 321 Cap
SS 321 Swage Nipple
SS 321 Barrel Nipple
SS 321 Spool   SS 321 Forged Fitting   SS 321 Threaded Fitting   SS 321 Bsp Threaded Fitting
SS 321 Spool
SS 321 Forged Fitting
SS 321 Threaded Fitting
SS 321 Bsp Threaded Fitting
SS 321 Bspt Threaded Fitting   SS 321 Npt Threaded Fittings   SS 321 Sockolet   SS 321 Weldolet
SS 321 Bspt Threaded Fitting
SS 321 Npt Threaded Fittings
SS 321 Sockolet
SS 321 Weldolet
SS 321 Elbolet   SS 321 Latrolet   SS 321 Nipolet   SS 321 Flangeolet
SS 321 Elbolet
SS 321 Latrolet
SS 321 Nipolet
SS 321 Flangeolet
SS 321 Sweepolet   SS 321 Socketweld Flange   SS 321 Weldneck Flange   SS 321 Blind Flange
SS 321 Sweepolet
SS 321 Socketweld Flange
SS 321 Weldneck Flange
SS 321 Blind Flange
SS 321 Lap Joint Flange   SS 321 Weldneck Rtj Flange   SS 321 Threaded Flange   SS 321 Orifice Flange
SS 321 Lap Joint Flange
SS 321 Weldneck Rtj Flange
SS 321 Threaded Flange
SS 321 Orifice Flange
SS 321 Spectacle Blind Flange   SS 321 Pipe        
SS 321 Spectacle Blind Flange
  SS 321 Pipe        


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