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Stainless Steel 347H Pipe Fittings

Chemical Composition %

C

Co

Cr

Mn

Ni

P

S

Si

Ta

Max

 

 

Max

 

Max

Max

Max

 

0.08

Trace*

17.0-20.0

2.0

9.0-13.0

0.04

0.30

0.75

Trace*

* The columbium plus tantalum content shall not be less than 10 times the carbon content and not more than 1.0% Note: 347H requires the columbium plus tantalum content to be not < 8 times the carbon content and not > 1.0%

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" 

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

DESCRIPTION
These types of stainless are austenitic chromium steels containing columbium. They are recommended for parts fabricated by welding which cannot be subsequently annealed. These types also are used for parts which are intermittently heated and cooled to temperatures between 800 deg. and 1600 deg.F. The addition of columbium produces a stabilized type of stainless that eliminates carbide precipitation, and consequently, intergranular corrosion.

DESIGN FEATURES
• Superior general corrosion resistance over Type 321 due to stabilization with columbium.
• Reduced tendencies to form continuous networks of chromium carbides at the grain boundaries.
• 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 maximum temperature is 1650 deg. F.
• Type 347H has high carbon (.04 - . 10) for better high temperature creep properties.
• Improved intergranular corrosion resistance.

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 347 45 Degree Elbow   SS 347 90 Degree Elbow   SS 347 180 Degree Elbow   SS 347 Equal Tee
SS 347 45 Degree Elbow
SS 347 90 Degree Elbow
SS 347 180 Degree Elbow
SS 347 Equal Tee
SS 347 Unequal Tee   SS 347 Barred Tee   SS 347 Concentric Reducer   SS 347 Eccentric Reducer
SS 347 Unequal Tee
SS 347 Barred Tee
SS 347 Concentric Reducer
SS 347 Eccentric Reducer
SS 347 Lateral   SS 347 Y   SS 347 Long Radius Bend   SS 347 Long Stubend
SS 347 Lateral
SS 347 Y
SS 347 Long Radius Bend
SS 347 Long Stubend
SS 347 Short Stubend   SS 347 Cap   SS 347 Swage Nipple   SS 347 Barrel Nipple
SS 347 Short Stubend
SS 347 Cap
SS 347 Swage Nipple
SS 347 Barrel Nipple
SS 347 Spool   SS 347 Forged Fitting   SS 347 Threaded Fitting   SS 347 Bsp Threaded Fitting
SS 347 Spool
SS 347 Forged Fitting
SS 347 Threaded Fitting
SS 347 Bsp Threaded Fitting
SS 347 Bspt Threaded Fitting   SS 347 Npt Threaded Fittings   SS 347 Sockolet   SS 347 Weldolet
SS 347 Bspt Threaded Fitting
SS 347 Npt Threaded Fittings
SS 347 Sockolet
SS 347 Weldolet
SS 347 Elbolet   SS 347 Latrolet   SS 347 Nipolet   SS 347 Flangeolet
SS 347 Elbolet
SS 347 Latrolet
SS 347 Nipolet
SS 347 Flangeolet
SS 347 Sweepolet   SS 347 Socketweld Flange   SS 347 Weldneck Flange   SS 347 Blind Flange
SS 347 Sweepolet
SS 347 Socketweld Flange
SS 347 Weldneck Flange
SS 347 Blind Flange
SS 347 Lap Joint Flange   SS 347 Weldneck Rtj Flange   SS 347 Threaded Flange   SS 347 Orifice Flange
SS 347 Lap Joint Flange
SS 347 Weldneck Rtj Flange
SS 347 Threaded Flange
SS 347 Orifice Flange
SS 347 Spectacle Blind Flange   SS 347 Pipe        
SS 347 Spectacle Blind Flange
  SS 347 Pipe        


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