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Alloy 904L (UNS N08904) is a superaustenitic stainless steel that is designed for moderate to high corrosion resistance in a wide range of process environments. The combination of high chromium and nickel content, coupled with additions of molybdenum and copper, assure good to excellent corrosion resistance.
With its highly alloyed chemistry — 25% nickel and 4.5% molybdenum, 904L provides good chloride stress corrosion cracking resistance, pitting and general corrosion resistance superior to 316L and 317L molybdenum enhanced stainless steels
Alloy 904L is easily welded and processed by standard shop fabrication practices.
The corrosion resistance of grade 904L is intermediate between super austenitic grades, with 6% molybdenum content, and standard 316L austenitic grades. Grade 904L is less resistant to nitric acid than grades 304L and 310L, which are free of molybdenum. This steel grade needs to be solution treated following cold working, to achieve maximum stress corrosion cracking resistance under critical environments.
Chemical Composition of ASTM A240 TP 904L Stainless Steel Plates and Sheets
Chemistries per ASTM A240 and ASME SA-240:
Grade
C
Mn
Si
P
S
Cr
Mo
Ni
Cu
904L
min.max.
-0.02
-2
-1
-0.045
-0.035
1923
45
2328
12
Mechanical Properties of ASTM A240 TP 904L Stainless Steel Plates and Sheets The typical mechanical properties of grade 904L stainless steels are given in the table below: Mechanical properties of grade 904L 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
36
70-90 typical
150
Physical Properties of ASTM A240 TP 904L Stainless Steel Plates and Sheets
The physical properties of grade 904L stainless steels are tabulated below: Typical physical properties of grade 904L 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
7900
190
15
-
-
11.5
-
500
952
Grade Specification Comparison of ASTM A240 TP 904L Stainless Steel Plates and Sheets
The following table outlines the approximate grade comparisons of 904L stainless steels: Grade specifications of grade 904L 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
-
Possible Alternative Grades of ASTM A240 TP 904L Stainless Steel Plates and Sheets The suitable alternatives to 904L stainless steels are tabulated below:
Possible alternative grades to grade 904L stainless steels
Grade
Reasons for choosing grade 904L
316L
A lower cost alternative, but with much lower corrosion resistance.
6Mo
A higher resistance to pitting and crevice corrosion 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.
Advantages
1.Good Quality and Complete Specifications The cutting is flat and smooth,advanced technology reliable quality complete specifications.
2.Accurate Tolerance Advanced machine production,exquisite workmanship,accurate thickness strict testing,each product is produced in strict accordance with the requirements. 3.Support Customization There are many product styles, complete specifications,support customization. 4.Professional Packaging Single box packaging.standard export sea-worthy packing and standard carton or according to customers demand for steel customized.
Certificates
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Exporter,Seller
Year Established:
2006
Total Annual:
15000000-20000000
Employee Number:
400~500
Ecer Certification：
Verified Supplier
Hongtu Metal was founded in 2006 with a registered capital of 27 million US dollars. It is a comprehensive, modern and high-quality enterprise integrating steel production, processing and sales. Since its establishment, the company has developed rapidly. It has built long-term and stable cooper... Hongtu Metal was founded in 2006 with a registered capital of 27 million US dollars. It is a comprehensive, modern and high-quality enterprise integrating steel production, processing and sales. Since its establishment, the company has developed rapidly. It has built long-term and stable cooper...
