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904L Pipe, 904L Stainless Steel Tubes - ASTM A213 ASME SA 213 UNS N08094 904L Tubes





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Guanyu Tube is a Specialized Manufacturer of 904L Tubing and 904L Pipe. We offer our customers two choice of raw material Outokumpu Stainless Steel / China Origin

ASTM A213 904L ASTM B677 N08904 904L Stainless Steel Pipe is a non-stabilised low carbon(0.02% max) high alloy austenitic stainless steel, there is no carbon deposition in the case of general heat treatment and welding. Eliminates the risk of the corrosion of the crystals that occur after heat treatment and welding. The addition of copper to this grade gives it greatly improved resistance to strong reducing acids, particularly sulphuric acid,Phosphoric Acid, Organic Acid, Inorganic Acid.. It is also highly resistant to chloride attack, both pitting / crevice corrosion and stress corrosion cracking.

Stainless Steel Tube in Plywood Cases

904L Stainless Steel Pipe Properties and Character

ASME SA213 904L N08904 Stainless steel tubing is designed for harsh environments of the corrosion conditions. As the high chromium, nickel, molybdenum and copper content, 904L has excellent corrosion resistance. Such as the uniform corrosion, especially in dilute sulfuric acid.

904L Stainless Steel Other properties included:
- Good resistance to pitting and crevice corrosion ability
- High resistance to stress corrosion cracking capacity
- Good resistance to intergranular corrosion ability
- Good machinability and weldability

904L Tubing is non-magnetic in all conditions and has excellent weldability and formability. The austenitic structure also gives this grade excellent toughness, even down to cryogenic temperature. Many of the applications in which this grade has previously performed well can now be fulfilled at lower cost by duplex stainless steel 2205 (S31803 or S32205), so it is used less commonly than in the past.

ASTM A213 904L N08904 Stainless Steel Chemical Composition

Table 1.Composition ranges for 904L N08904 1.4539 Stainless Steel According to ASTM A213 /ASTM A312 and EN 10216-5

Grade - C Mn Si P S Cr Mo Ni Cu N
ASTM A213N08904 904L min. max. - 0.020 - 2.00 - 1.00 - 0.040 - 0.030 19.0 23.0 4.0 5.0 23.0
28.0
1.0
2.0
-
0.10
EN 10216-5 1.4539 min. max. - 0.020 - 2.00 - 0.70 - 0.030 - 0.010 19.0 21.0 4.0 5.0 24.0
26.0
1.2
2.0
-
0.15

904L N08904 Stainless Steel Tubes Mechanical Properties

Grade Tensile Strength Yield Strength 0.2% Proof Elongation (% in 50mm) Hardness Hardness
- (MPa) min (MPa) min min Rockwell B (HRB) Brinell (HB)
904L N08904 490 215 35 90 -
Rockwell Hardness value range is typical only; other values are specified limits.

904L N08904 Stainless Steel Physical Properties

Grade Density
Elastic Modulus
Mean Co-eff of Thermal Expansion (µm/m/°C) Mean Co-eff of Thermal Expansion (µm/m/°C) Mean Co-eff of Thermal Expansion (µm/m/°C) Thermal Conductivity
(W/m.K)
Thermal Conductivity
(W/m.K)
Specific Heat 0-100°C
Elec Resistivity
  (kg/dm³) (GPa) 0-100°C 0-315°C 0-538°C At 20°C At 500°C (J/kg.K) (nΩ.m)
904L 8.0 200 15 - - 13 - 500 850

904L Pipe Corrosion Resistance

Although originally developed for its resistance to sulphuric acid it also has a very high resistance to a wide range of environments. A PRE of 35 indicates that the material has good resistance to warm sea water and other high chloride environments. High nickel content results in a much better resistance to stress corrosion cracking than the standard austenitic grades. Copper adds resistance to sulphuric and other reducing acids, particularly in the very aggressive "mid concentration" range.

In most environments 904L has a corrosion performance intermediate between the standard austenitic grade 316L and the very highly alloyed 6% molybdenum and similar "super austenitic" grades.

In aggressive nitric acid 904L Stainless Steel Tubing has less resistance than molybdenum-free grades such as 304L and 310L.

For maximum stress corrosion cracking resistance in critical environments the steel should be solution treated after cold work.

904L Stainless Steel Pipe Heat Resistance

Good resistance to oxidation, but like other highly alloyed grades suffers from structural instability (precipitation of brittle phases such as sigma) at elevated temperatures. 904L should not be used above about 400°C.

904L Stainless Steel Tubing Heat Treatment

Solution Treatment (Annealing) - heat to 1090-1175°C and cool rapidly. This grade cannot be hardened by thermal treatment.

904L Stainless Steel Tubing Welding

904L can be successfully welded by all standard methods. Care needs to be taken as this grade solidifies fully austenitic, so is susceptible to hot cracking, particularly in constrained weldments. No pre-heat should be used and in most cases post weld heat treatment is also not required. AS 1554.6 pre-qualifies Grade 904L rods and electrodes for welding of 904L.

904L Stainless Steel Pipe Fabrication

904L is a high purity, low sulphur grade, and as such will not machine well. Despite this the grade can be machined using standard techniques.

Bending to a small radius is readily carried out. In most cases this is performed cold. Subsequent annealing is generally not required, although it should be considered if the fabrication is to be used in an environment where severe stress corrosion cracking conditions are anticipated.

904L Stainless Steel Tubing Applications

Typical application include:

·        904L Pipe in Processing plant for sulphuric, phosphoric and acetic acids

·         904L Pipe in Pulp and paper making processing

·         904L Stainless Steel Pipe in Components in gas scrubbing plants

·         TP904L Stainless Steel Pipe in Seawater cooling equipment

·         904LTubing in Oil refinery components

·         Wires in electrostatic precipitators

904L Pipe UNS N08904 Standard Specification

ASTM B677 - 04 Standard Specification for UNS N08904, UNS N08925, and UNS N08926 Seamless Pipe and Tube
ASTM A213 Seamless ferritic and austenitic alloy steel boiler, superheater and heat exchanger tubes
ASTM A269 Seamless and welded austenitic stainless steel tubing for general service
ASTM A312 Seamless and welded austenitic stainless steel pipes

Table Grade specifications for 904L N08904 Stainless Steel Tubes.

Grade UNS No British British Euronorm Euronorm Swedish Japanese JIS
Grade Grade BS En No Name SS JIS
904L N08904 904S13 - 1.4539 X1NiCrMoCuN25-20-5 2562 -

These comparisons are approximate only. The list is intended as a comparison of functionally similar materials not as a schedule of contractual equivalents. If exact equivalents are needed original specifications must be consulted.

904L N08904 Stainless Steel Pipe Possible Alternative Grades

Table Possible alternative grades to 904L stainless steel tubes.

Grade Why it might be chosen instead of 904L N08904
316L A lower cost alternative, but with much lower corrosion resistance.
6Mo A higher resistance to pitting and crevice corrosion resistance is needed.
2205 A very similar corrosion resistance, with the 2205 having higher mechanical strength, and at a lower cost to 904L. (2205 not suitable for temperatures above 300°C.)
Super duplex 2507 has an higher corrosion resistance is needed, together with a higher strength than 904L.

904L Stainless Steel Raw Material Mill Test Certificate issued by Outokumpu

904L Pipe 904L Tubes Marking and Packing



904L Pipe, 904L Tubing
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904L Stainless Steel Tubing Related Links

Stainless Steel Tube/Pipe/Tubing, Nickel Alloy Tubing, Brass Alloy Tubing, Copper Nickel Pipe Material Grades


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ASTM A213 | ASTM A269
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ASTM B161 / ASME SB 161 | ASTM B111
EN 10216-5
ASTM A789 ASME SA 789 S31803 S32205 S32101 S32750 S32760 S32304 S31500 S31260 Seamless Tubes
EN 10216-5 1.4462 1.4362 1.4162 1.4410 1.4501 Seamless Tubes
Nickel Alloy Tubing:

UNS N08020 Nickel Alloy 20 Tubing
UNS N02200 Nickel Alloy 200 Tube
UNS N02201 Nickel Alloy 201 Pipe
UNS N04400 400 Nickel Alloy Tubing
N06600 600 2.4816 Nickel Alloy Pipe
N06601 601 2.4851 Nickel Alloy Tubing
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DIN 2393 St28 St34.2 St37.2 St44.2 St52.3 Welded Precision Steel Tubes
EN 10305-2 E195 E235 E355 Welded Cold Drawn Precision Steel Tube