Stainless Steel 904L Round Bar Supplier Mumbai for Corrosion-Resistant Industrial Applications
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Meta Description: 904L Round Bar Supplier Mumbai supplying UNS N08904 stainless steel bars for chemical processing, sulphuric acid, marine, pharmaceutical and heat exchanger applications.
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Table of Contents
- What Is 904L Round Bar?
- 904L Stainless Steel UNS N08904 and EN 1.4539
- 904L Chemical Composition
- 904L Round Bar Corrosion Resistance
- 904L Mechanical Properties
- 904L Round Bar Applications
- 904L Machining and Fabrication
- 904L Round Bar Sizes and Finishes
- 904L Round Bar Specifications
- What Affects 904L Round Bar Price?
- How to Buy 904L Round Bar
- 904L Round Bar Supplier in Mumbai
- Frequently Asked Questions
- Request a Quote
What Is 904L Round Bar?
904L Round Bar is a high-alloy austenitic stainless steel round bar designed for applications where very high corrosion resistance is required.
The material is identified by:
UNS: N08904
EN: 1.4539
Grade: 904L
904L contains relatively high levels of nickel and molybdenum compared with conventional austenitic stainless steels. This alloying combination gives the material strong resistance to a range of corrosive environments.
Outokumpu identifies 904L as a high-nickel and molybdenum-alloyed austenitic stainless steel with very high corrosion resistance, particularly in applications involving medium-concentration sulphuric acid.
External technical reference:
Read Outokumpu’s 904L stainless steel technical information.
For industrial buyers, 904L Round Bar is therefore considered when the service environment is significantly more demanding than what standard stainless grades can comfortably handle.
904L Stainless Steel UNS N08904 and EN 1.4539
A proper enquiry should identify 904L using its recognized designations.
Commercial Grade: 904L
UNS: N08904
EN Material Number: 1.4539
Product: Round Bar
Outokumpu lists EN 1.4539 and UNS N08904 for its 904L product.
For a purchasing requirement, specify:
Material: Stainless Steel 904L
UNS: N08904
EN: 1.4539, where applicable
Product: Round Bar
Diameter: Required size
Length: Required length
Condition: As specified
Finish: As specified
Quantity: Required quantity
Testing: As required
The applicable product standard should always be confirmed from the customer’s drawing or purchase order.
904L Chemical Composition
904L is designed around a high-alloy chemistry in which nickel and molybdenum play an important role in its corrosion resistance.
A representative composition published by Outokumpu is:
| Element | Approximate Typical Content |
|---|---|
| Carbon (C) | 0.01% |
| Chromium (Cr) | 19.8% |
| Nickel (Ni) | 24.2% |
| Molybdenum (Mo) | 4.3% |
| Copper (Cu) | 1.4% |
| Iron (Fe) | Balance |
These are representative values rather than a substitute for the limits in the applicable product specification.
The high nickel level, combined with chromium, molybdenum and copper, contributes to 904L’s performance in corrosive environments.
For supplied material, the actual chemistry should be checked against the Mill Test Certificate (MTC).
904L Round Bar Corrosion Resistance
Corrosion resistance is the primary reason engineers specify 904L.
Outokumpu describes 904L as having very high corrosion resistance and specifically identifies applications involving medium-concentration sulphuric acid.
The material is also used in selected applications involving:
- Chemical processing
- Petrochemical service
- Seawater handling
- Desalination
- Heat exchangers
- Pharmaceutical processing
- Pulp and paper bleaching equipment
- Hydrometallurgy
The actual corrosion performance always depends on the service environment.
Important variables include:
Chemical concentration
Operating temperature
Chloride content
Flow conditions
Contaminants
Exposure time
Therefore, 904L should not be selected based only on the phrase “corrosion resistant.”
The complete operating environment should be reviewed before final material selection.
904L Mechanical Properties
904L is primarily selected for corrosion performance, but its mechanical properties are also important when round bar is machined into shafts, pins, fittings or other components.
Outokumpu’s published data for 904L plate, sheet and strip under ASTM A240 shows representative minimum values of approximately:
| Property | Representative Value |
|---|---|
| Yield Strength | 220 MPa |
| Tensile Strength | 490 MPa |
| Elongation | 35% |
These figures are for the specific product form and specification shown by Outokumpu and should not automatically be applied to every 904L Round Bar.
For round-bar procurement, use the mechanical requirements applicable to the selected bar specification and delivery condition.
904L Round Bar Applications
Chemical Processing Equipment
Chemical processing is one of the major application areas for 904L.
The alloy is suitable for selected process components where resistance to corrosive chemicals is important.
Sulphuric Acid Service
904L was developed with strong resistance to sulphuric-acid environments in mind.
Outokumpu identifies handling medium-concentration sulphuric acid as a typical application.
Petrochemical Equipment
Petrochemical processing can expose components to combinations of chemicals and elevated temperatures.
904L can be considered for selected applications where its corrosion characteristics are beneficial.
Heat Exchangers
Heat exchangers operating with aggressive process fluids can require high-alloy stainless steels.
904L is listed among materials used for heat-exchanger applications.
Seawater and Desalination
904L can be used for selected seawater-handling and desalination applications, depending on the exact environment. Outokumpu specifically lists both desalination and seawater handling among typical applications.
Pharmaceutical and Food Processing
904L is also used in selected food, beverage and pharmaceutical applications where corrosion resistance and process compatibility are important.
Pumps, Valves and Machined Components
904L Round Bar can be machined into components such as:
- Shafts
- Pins
- Valve components
- Pump components
- Bushes
- Fasteners
- Special-purpose machined parts
The suitability of the grade depends on the process fluid and mechanical requirements.
904L Machining and Fabrication
904L is an austenitic stainless steel, and machining should be planned according to its material behaviour.
Typical operations include:
- Turning
- Milling
- Drilling
- Threading
- Boring
- Grinding
As with other corrosion-resistant austenitic stainless steels, proper tool selection and cutting conditions are important.
For CNC production, stable workholding, appropriate cutting parameters and adequate coolant can help control heat and tool wear.
Machining parameters should be established for the specific grade, bar condition, machine and tool system rather than copied directly from carbon-steel machining tables.
Welding
904L is weldable using suitable procedures.
For critical fabrication, the welding procedure should be selected according to the applicable engineering specification, filler-metal requirements and service environment.
The material should not be treated like an ordinary mild-steel fabrication grade simply because it is supplied as a round bar.
904L Round Bar Sizes and Finishes
904L Round Bar may be required in different diameters, lengths and finishes depending on the final application.
Common requirements include:
Bright Round Bar
Suitable where improved surface quality and dimensional control are required.
Cold-Finished Round Bar
Used for applications requiring controlled dimensions.
Turned or Peeled Bar
Useful where the starting diameter needs closer dimensional control.
Ground Round Bar
Suitable for precision-machined applications.
Cut-to-Length Bar
Useful where components are produced in repetitive machining operations.
Manan Steel & Metals lists 904L Round Bar within its stainless-steel round-bar range.
View the Stainless Steel 904L Round Bar product range from Manan Steel & Metals.
904L Round Bar Specifications
A clear purchase specification should include the material designation and product requirements.
| Requirement | Example |
|---|---|
| Grade | Stainless Steel 904L |
| UNS | N08904 |
| EN | 1.4539 |
| Product | Round Bar |
| Diameter | ___ mm |
| Length | ___ mm |
| Finish | Bright / Ground / Turned |
| Condition | As specified |
| Quantity | ___ kg / pieces |
| Testing | MTC / PMI / Mechanical / Other |
Depending on the project, customers may specify ASTM, ASME, EN or another recognized standard.
The exact standard should be confirmed before ordering because different standards cover different product forms.
What Affects 904L Round Bar Price?
The 904L Round Bar price depends on the full technical and commercial requirement.
Nickel and Molybdenum Content
904L contains significant amounts of nickel and molybdenum, which contribute to its specialty-alloy cost.
Diameter
Larger diameters require more raw material and can involve different processing requirements.
Length
Cut-to-length requirements can affect material utilization and processing.
Finish
Bright, peeled, turned and ground finishes require different manufacturing processes.
Quantity
Pricing for a production requirement can differ from pricing for a small quantity.
Testing
MTC, PMI, mechanical testing, dimensional inspection and third-party inspection can influence the quotation.
Availability
The availability of the required diameter and condition can affect both price and delivery.
For an accurate 904L Round Bar price in Mumbai, buyers should send the complete specification instead of relying on a generic online price.
How to Buy 904L Round Bar
A good industrial enquiry should contain:
Material: Stainless Steel 904L
UNS: N08904
EN: 1.4539, if required
Standard: Applicable product standard
Diameter: ___ mm
Length: ___ mm
Condition: ___
Finish: ___
Quantity: ___ kg / pieces
Testing: ___
Application: Chemical / Marine / Pharmaceutical / Heat Exchanger / Other
For corrosion-critical applications, providing the service medium and operating temperature can also be useful.
This helps the supplier understand the technical requirement rather than treating the enquiry as a generic stainless-steel bar purchase.
904L Round Bar Supplier in Mumbai
For companies searching for a 904L Round Bar Supplier Mumbai, Manan Steel & Metals supplies stainless-steel and specialty round bars for industrial requirements.
The current Manan round-bar range lists Stainless Steel 904L Round Bar among its stainless-steel grades.
Explore the Manan Steel & Metals stainless steel round-bar range.
When sending a 904L enquiry, mention:
904L / UNS N08904
Required diameter
Required length
Applicable standard
Condition
Finish
Quantity
Testing/documentation
Application
Providing the UNS designation helps avoid confusion with other high-alloy stainless grades.
Frequently Asked Questions
What is 904L Round Bar?
904L Round Bar is a high-alloy austenitic stainless-steel round bar designed for demanding corrosion-resistant applications.
What is the UNS number of 904L?
The UNS number of 904L is N08904. Outokumpu also identifies the grade as EN 1.4539.
Is 904L suitable for sulphuric acid?
904L is specifically recognized for resistance in suitable sulphuric-acid environments, including medium-concentration sulphuric acid. Actual suitability depends on concentration, temperature and other service conditions.
Where is 904L Round Bar used?
904L can be used in selected chemical-processing, petrochemical, pharmaceutical, seawater, desalination and heat-exchanger applications.
Is 904L austenitic stainless steel?
Yes. 904L is an austenitic stainless steel with high nickel and molybdenum content.
Can 904L Round Bar be machined?
Yes. 904L can be machined using conventional metal-cutting operations with tooling and cutting parameters suitable for austenitic stainless steel.
What affects 904L Round Bar price?
Diameter, length, finish, quantity, specification, testing, availability and the cost of nickel- and molybdenum-bearing raw materials can affect the final quotation.
How can I buy 904L Round Bar in Mumbai?
Send the required 904L / UNS N08904 grade, diameter, length, standard, finish, quantity and testing requirements to Manan Steel & Metals.
Request a Quote for 904L Round Bar
Manan Steel & Metals
Shop No. 2, Hira Building, 97 Khetwadi Main Road (Nanubhai Desai Road), Girgaon, Mumbai – 400004, Maharashtra, India
Phone: 7977369869
Email: manansteel@gmail.com
Website: www.manansteel.com
For a faster quotation, send:
Material: Stainless Steel 904L
UNS: N08904
EN: 1.4539
Diameter: ___ mm
Length: ___ mm
Condition: ___
Finish: ___
Quantity: ___ kg / pieces
Testing: ___
Application: ___
For corrosion-critical applications, also mention the process medium and approximate operating conditions.