Product Details
No.1 2B Finish No. 8 BA /Bright Annealed Satin Finish Hairline
Finish EN1.4539 ASTM A240 TP 904L Stainless Steel plate
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.
|
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
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Single box packaging.standard export sea-worthy packing and
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customized.
Certificates
Company Profile
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 cooperative relations with Shandong Iron and
Steel, Rizhao Iron and Steel, Shanxi Tisco, Shanghai Baoshan Iron
and Steel, Xiwang Special Steel and other major domestic steel
plants. It is the first-class agent of major steel plants and has
been selected as excellent agent and excellent cooperator for many
times. In order to provide better services to customers, the
company has set up a professional foreign trade team to solve
one-stop steel export business for customers.
