What is the specification of 904L SS pipe?

What is the specification of 904L SS pipe?

904L stainless steel pipe is a super-austenitic stainless steel that meets standards such as ASTM A312 and ASTM B677. It is available in seamless or welded forms and features high chromium, nickel, molybdenum, and copper contents, providing excellent corrosion resistance, particularly in sulfuric and phosphoric acid environments. However, it typically contains the following composition: 19-23% chromium, 23-28% nickel, 4-5% molybdenum, and 1-2% copper, with low carbon elements to improve weldability. Specific sizes and specifications are dictated by specific standards.

 

904L stainless steel seamless pipe has a nominal inside diameter range of ½ inch to 16 inches, electric resistance welded pipe has a nominal inside diameter range of ½ inch to 24 inches, and 904L stainless steel electric fusion welded pipe has a nominal inside diameter range of 6 inches to 100 inches. Sizes range from 1/8 inch to 30 inches. These ASTM B677 UNS N08904 ERW pipes are designed for large-diameter pipes. They are available in sizes ranging from Sch20 to XXS. They are available with various pipe ends, such as flat ends, bevel ends, and threaded ends. For more information on products and pricing related to UNS N08904 seamless pipe, please contact us.

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Specification List of ASTM B677 UNS N08904 Pipes

Specifications	ASTM B673, B677 / ASME SB673, SB 677
Dimensions	ASTM, ASME and API
SS 904L Pipes	1/2″ NB – 16″ NB
ERW 904L Pipes	1/2″ NB – 24″ NB
EFW 904L Pipes	6″ NB – 100″ NB
Size	1/8″NB TO 30″NB IN
Specialized in	Large Diameter Size
Schedule	SCH20, SCH30, SCH40, STD, SCH80, XS, SCH60, SCH80, SCH120, SCH140, SCH160, XXS
Type	Seamless / ERW / Welded / Fabricated / LSAW Pipes
Form	Round, Square, Rectangular, Hydraulic Etc
Length	Single Random, Double Random & Cut Length.
End	Plain End, Beveled End, Treaded

Composition ranges of grade 904L stainless steels

Grade		C	Mn	Si	P	S	Cr	Mo	Ni	Cu
904L	min. max.	- 0.02	- 2	- 1	- 0.045	- 0.035	19 23	4 5	23 28	1 2

Mechanical Properties

Grade	Tensile Strength (MPa) min	Yield Strength 0.2% Proof (MPa) min	Elongation (% in 50mm) min	Hardness
				Rockwell B (HR B)	Brinell (HB)
904L	490	220	36	70-90 typical	150

Physical Properties

Grade	Density (kg/m3)	Elastic Modulus (GPa)	Mean Co-eff of Thermal Expansion (µm/m/°C)			Thermal Conductivity (W/m.K)		Specific Heat 0-100°C (J/kg.K)	Elec Resistivity (nΩ.m)
			0-100°C	0-315°C	0-538°C	At 20°C	At 500°C
904L	7900	190	15	-	-	11.5	-	500	952

 

Heat Resistance
Grade 904L stainless steels pipe offer good oxidation resistance. However, the structural stability of this grade collapses at high temperatures, particularly above 400°C.

 

Heat Treatment
Grade 904L stainless steels pipe can be solution heat-treated at 1090 to 1175°C, following by rapid cooling. Thermal treatment is suitable for hardening these grades.

 

Welding
Welding of grade 904L stainless steels pipe can be performed using all conventional methods. This grade does not require pre-heat and post-weld heat treatments. Grade 904L can be subjected to hot cracking in constrained weldment. Grade 904L electrodes and rods are used for welding grade 904L steels according to AS 1554.6.

 

Some of the major applications of grade 904L stainless steels pipe include:
Wiring in electrostatic precipitators
Oil refinery components
Seawater cooling devices
Gas scrubbing plants
Pulp and paper processing industries
Acetic, phosphoric and sulphuric acid processing plants

 

If you have project requirements for 904L stainless steel pipe, we welcome your order. GNEE has a large inventory of popular products for you to choose from. We can process these products into a variety of practical forms, including 904L SS Rectangular Pipe, 904L SS Electropolished Pipes/Tubes, 904L SS Round Pipe, 904L SS Handrail Pipe, 904L Thin-Wall Stainless Steel Pipe, 904L Polished Stainless Steel Pipe, and Stainless Steel 904L Capillary Pipe.

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