904L Stainless Steel Seamless Pipes and Tubes manufacturer-Saudi Arabia

904L Stainless Steel Seamless Pipes and Tubes manufacturer-Saudi Arabia

أنابيب الفولاذ المقاوم للصدأ 904L سلس وأنابيب الصانع المملكة العربية السعودية

904L is a non-stabilised low carbon high alloy austenitic stainless steel. The addition of copper to this grade gives it greatly improved resistance to strong reducing acids, particularly sulphuric acid. It is also highly resistant to chloride attack – both pitting / crevice corrosion and stress corrosion cracking. This grade 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 temperatures. 904L does have very substantial contents of the high cost ingredients nickel and molybdenum. 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.

904L Stainless Steel Pipes and Tubes Product Range 

904L Stainless Steel Pipes and Tubes Specifications: ASTM A/ASME SA 269/677 904L Stainless Steel Pipes and Tubes Sizes (Seamless): 1/2″ NB – 8″ NB

904L Stainless Steel Pipes and Tubes Sizes (ERW): 1/2″ NB – 24″ NB

904L Stainless Steel Pipes and Tubes Sizes (EFW): 6″ NB – 100″ NB  

904L Stainless Steel Pipes and Tubes Wall Thickness available:

Schedule 5S – Schedule XXS (heavier on request)

904L Stainless Steel Pipes and Tubes Other Materials Testing:


904L Stainless Steel Pipes and Tubes Dimensions:

All Pipes is manufactured and inspected/tested to the relevant standards including ASTM, ASME and API etc.

Key Properties

These properties are specified for flat rolled product (plate, sheet and coil) in ASTM B625. Similar but not necessarily identical properties are specified for other products such as pipe, tube and bar in their respective specifications.


Table 1. Composition ranges for 904L grade of stainless steels.

Grade C Mn Si P S Cr Mo Ni Cu
904L min.max. -0.020 -2.00 -1.00 -0.045 -0.035 19.023.0 4.05.0 23.028.0 1.02.0

Mechanical Properties

Table 2. Mechanical properties of 904L grade stainless steels.

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 35 70-90 typical
Rockwell Hardness value range is typical only; other values are specified limits.

Physical Properties

Table 3. Typical physical properties for 904L grade stainless steels.

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 8000 200 15 13 500 850

Grade Specification Comparison

Table 4. Grade specifications for 904L grade stainless steels.

Grade UNS No Old British Euronorm Swedish SS Japanese JIS
BS En No Name
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.

Possible Alternative Grades

Table 5. Possible alternative grades to 904L stainless steel.

Grade Why it might be chosen instead of 904L
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 Higher corrosion resistance is needed, together with a higher strength than 904L.

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Click on below for other Stainless Steel Grades Pipes & tubes available in High quality :


Stainless Steel Pipes & Tubes / أنابيب الصلب غير القابل للصدأ وأنابيب

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