Exotic Alloys SS 904L Industrial Valves Overview
Zeon Exports supplies Exotic Alloys SS 904L (UNS N08904) industrial valves – ball, gate, globe and check types – a low-carbon super austenitic stainless steel with copper addition for outstanding resistance to sulfuric acid and chloride environments.
Exotic Alloys SS 904L Industrial Valves control and isolate flow in chemical processing, pulp bleaching and flue gas cleaning process lines. Its high nickel and molybdenum content, roughly double that of 316L, combined with copper addition gives outstanding resistance to sulfuric acid, pitting and stress corrosion cracking.
- Copper addition gives strong sulfuric acid resistance across concentrations
- Tensile ≥490 MPa, yield ≥220 MPa in the annealed condition
- EN 10204 3.1 certified, export-ready worldwide
Quick Specifications of Exotic Alloys SS 904L Industrial Valves
Exotic Alloys SS 904L Industrial Valves are produced to internationally recognized specifications.
| Field | Detail |
|---|---|
| Material/Grade | Exotic Alloys SS 904L |
| UNS | N08904 |
| DIN/Werkstoff Number | 1.4539 |
| Form | Ball, Gate, Globe, Check Valves |
| Finish | As specified |
| Heat Treatment | Solution Annealed |
| Certification | EN 10204 3.1 |
Equivalent Grades of SS 904L
SS 904L is recognized under several international designations below.
| UNS | DIN/Werkstoff Number | Common Trade Name |
|---|---|---|
| N08904 | 1.4539 | 904L |
Chemical Composition of SS 904L
Composition for UNS N08904; exact limits can vary slightly by specification and heat.
| Element | Composition (%) |
|---|---|
| Chromium (Cr) | 19.0 – 23.0 |
| Nickel (Ni) | 23.0 – 28.0 |
| Molybdenum (Mo) | 4.0 – 5.0 |
| Copper (Cu) | 1.0 – 2.0 |
Physical Properties of Exotic Alloys SS 904L
Typical physical properties for 904L; confirm exact heat-specific figures against the mill test certificate.
| Property | Value |
|---|---|
| Density | ~8.0 g/cm3 (typical) |
| Melting Range | ~1320–1390°C (typical) |
| Magnetic Behaviour | Essentially non-magnetic (annealed) |
Mechanical Properties of Exotic Alloys SS 904L Industrial Valves
Minimum mechanical properties for annealed UNS N08904.
| Property | Minimum Value |
|---|---|
| Tensile Strength | ≥490 MPa (71 ksi) |
| Yield Strength (0.2% offset) | ≥220 MPa (31 ksi) |
| Elongation | ≥35% |
| Condition | Solution Annealed |
Corrosion Resistance of Exotic Alloys SS 904L
Exotic Alloys SS 904L Industrial Valves were developed for medium-concentration sulfuric acid and chloride-bearing environments.
- Acid resistance: copper addition makes it useful across all concentrations of sulfuric acid.
- Pitting and crevice resistance: high molybdenum and nickel give strong resistance to chloride pitting and crevice attack.
- Chloride SCC resistance: high nickel content resists chloride stress corrosion cracking that limits standard austenitic grades.
Heat Resistance of Exotic Alloys SS 904L
Exotic Alloys SS 904L valves are non-magnetic in the annealed condition and offer good toughness at cryogenic temperatures, but are generally selected for moderate-temperature aqueous and chemical service. Confirm exact service limits against the governing standard and application before specifying.
Key Properties of Exotic Alloys SS 904L Industrial Valves
Beyond corrosion and heat performance, 904L valves offer these additional properties.
- Good weldability using matched filler metal
- Good formability similar to standard austenitic stainless steels
- Good toughness maintained at cryogenic temperatures
- Widely used across chemical and pulp & paper processing
Benefits of Exotic Alloys SS 904L Industrial Valves
Choosing 904L valves from Zeon Exports delivers measurable advantages for your project.
- Reliable sulfuric acid resistance across a wide concentration range
- Full MTC 3.1 documentation for project QA/QC requirements
- Multiple valve types and end connections to match project specs
- Reliable bulk supply with consistent ready stock
- Competitive export pricing for large industrial orders
- Fast dispatch to global project sites and ports
Related Products
Explore related Exotic Alloys products from Zeon Exports.
Request a Quote for Exotic Alloys SS 904L Industrial Valves
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Call: +91 98205 33105
Email: info@zeonexports.com
Website: www.zeonexports.com
Address: A-7/9, Saboo Building, Ardeshir Dady Cross Lane, Cawasji Patel Tank Road, Mumbai – 400004
Frequently Asked Questions About Exotic Alloys SS 904L Industrial Valves
Common questions about Exotic Alloys SS 904L Industrial Valves, answered below.
Q1: What is Exotic Alloys SS 904L?
Ans. SS 904L (UNS N08904) is a low-carbon super austenitic stainless steel with copper addition for acid resistance.
Q2: Which valve types are available in SS 904L?
Ans. We supply ball, gate, globe and check valves with 904L bodies and trim.
Q3: Is SS 904L resistant to sulfuric acid?
Ans. Yes, copper addition makes it useful across all concentrations of sulfuric acid.
Q4: Is SS 904L magnetic?
Ans. SS 904L is essentially non-magnetic in the annealed condition.
Q5: Is SS 904L resistant to chloride stress corrosion cracking?
Ans. Yes, its high nickel content resists chloride stress corrosion cracking that limits standard austenitic grades.
Q6: What certification is provided with orders?
Ans. Every order ships with EN 10204 3.1 mill test certificates confirming grade, heat and dimensions.
Q7: Does Zeon Exports supply custom valve sizes?
Ans. Yes, valves are available in custom sizes and end connections on request for bulk industrial orders.
Q8: How is SS 904L different from Alloy 20?
Ans. SS 904L offers broader chloride and general acid resistance, while Alloy 20 is optimized specifically for maximum sulfuric acid resistance.
