SS 904L Round Bar

904L Stainless Steel is an a commercial grade of authentic stainless steel which has a very low carbon content and is non stabilized. It is high in nickel and copper alloy and is blended with copper to increase its resistance to acids like sulphuric acid which is also a good reducing agent. This is usually resistant in both mild as well as aggressive condition. It has a high percentage of nickel and molybdenum.  It is also resistant to other things like crevice and stress corrosion. It is tough, weldable and is not magnetic but gives superb formability. Alloy 904L, UNS N08904 are the usual trade names for 904L.

Corrosion Resistance

This grade of 904L has a great resistance to chloride attack and warm seawater and is less resistant to nitric acid. Thus a 904L free of molybdenum is not as resistant to nitric acid and the steel grade has to be treated with solution after a cold working so as to obtain maximum  stress corrosion cracking resistance under special environments.


Usually the 904L brand of stainless steel can be welded by conventional methods. It does not need any post or pre heat treatment. It is subjected to a lot of heat and cracking in confined welding treatment. Usually Grade 904L electrodes as well as rods are used


♦ Types & Range of SS 904L Round Bar ♦

Types: Round Bar, Hex Bar, Bright Bar, Forged Bar, Square Bar, Hollow Bar, Black Bar
Range: 5 mm To 500 mm Dia in 100 mm TO 6000 mm Length available with NACE MR 01-75.



♦ Standard of SS 904L Round Bar ♦

Standard:  ASTM / ASME SB 366, ASTM / ASME B 677 , ASTM / ASME B 677.


♦ Other Product Names ♦

  • Nickel Alloy 904
  • Alloy 904L
  • A904
  • UNS N08904
  • SS 904L
  • Werkst. nr. 1.4539


♦ Key Properties of SS 904L Round Bar ♦

  • Weldability
  • Machinability
  • Heat Treatment
  • Pickling
  • Good resistance to pitting and crevice corrosion.
  • Very good resistance to stress corrosion cracking.
  • Good resistance to intergranular corrosion.
  • Good formability and weldability.
  • Maximum service temperatures of
  • 450 deg.C. (824 deg.F)

♦ Application of SS 904L Round Bar ♦

  • Nuclear Components
  • Thermocouples
  • Heat Exchanger
  • Petrochemical
  • Chlorination Equipment
  • pharmaceuticals
  • chemicals fertilizers
  • paper & pulp
  • Dairy
  • Power
  • Oil extractions

♦ Chemical Composition ♦

Cmax. Mnmax. Simax. Pmax. Smax. Cr Mo Ni Cu
0.020 2.00 1.00 0.045 0.035 19.00 ~ 23.00 4.00 ~ 5.00 23.00~28.00 1.00 ~2.00


♦ Mechanical Properties ♦.

Grade Tensile Strength (MPa) min Yield Strength 0.2% Proof (MPa) min Elongation (% in 50mm) min Hardness
Rockwell B (HR B)
904L 490 220 36 70-90


Physical Properties ♦

Elastic Modulus
Mean Co-eff of Thermal Expansion (µm/m/°C)  –
0-100°C 15
Thermal Conductivity
(W/m.K)  At 20°C
Specific Heat 0-100°C
Elec Resistivity
♦ Material & Specification of SS 904L Round Bar ♦

Material & Specifications:

Specialty Steel Exotic & UNS N08904 ASTM B677.


♦ Forms of SS 904L Round Bar ♦

  • SS 904L Bars
  • SS 904L Rods
  • SS 904L Forged Round Bars
  • SS 904L Square Bars
  • SS 904L Hollow Bar
  • SS 904L Black Bars
  • SS 904L Threaded Bars
  • SS 904L Hexagon Bars
  • SS 904L Cold Drawn Bars
  • SS 904L Bright Bars
  • SS 904L Spring Steel Bars
  • SS 904L Hex Bars
ss 904l Round bar

♦ Siddhagiri is there for you ♦

Siddhagiri Metals and Tubes is a market giant for manufacturing and supplying SS 904L Round Bar. All our products that we deal with are of high quality, in accordance with international standards and are available in all possible shapes and sizes.

The strategies that we form are guided towards total customer satisfaction. Our main objective to satisfy our customers first by listening to the very detail provided by them, helping them get the right products with suitable specifications. Our specialised unit looks after carrying out strict quality check for each and every product individually eventually keeping no scope for defective products and seeing more happy faces.Siddhagiri Metals and Tubes has been a leading distributor of Stainless Steel and Alloy Steel Products since long. We have been manufacturing and supplying the best quality products and are experts in sourcing the basic requirements of the clients for nickel based alloys. We aim at providing the most unique services and have gained our customer’s confidence due to our expertise and propulsion in these alloys. We handle our customer’s requirement as supreme need and extend our sincere dedication in figuring out their needs.

♦ Quality Assurance ♦

At Siddhagiri Metal, all fittings and Flanges are liable to strict assessment at every phase of the creation process, from beginning material buying to item dispatch. They are outwardly inspected for adjustment to ASTM, ASME, MSS, DIN, EN, and JIS codes and principles. Upon solicitation, authority ensured Inspection Agencies can be brought into witness the material reports, measurements and quality congruity of items.

♦ Our Test Certificate Includes ♦

  • Positive Material Identification – PMI Testing
  • Chemical Analysis – Spectro Analysis
  • Mechanical Testing Such as Tensile, Elongation, Reduction of Area
  • Micro Test
  • Macro Test
  • Hardness Test
  • Pitting Resistance Test
  • Intergranular Corrosion (IGC) Test
  • Flaring Test
  • Flattening Test
  • Hydrostatic Test
  • Radiography Test
  • Dye Penetrant Test (DP Test)
  • Ultra Sonic Test (UT)
  • Impact Test
  • Bend Test

♦ Documentations: We provide the following records on requirement along with our supplies ♦

  • Certificate of Origin legalized/attested by Chamber of Commerce or Embassy
  • Commercial Invoice including HS Code
  • Packing List including number of boxes, net weight and gross weight, Marks and Numbers
  • Fumigation Certificates
  • Test Certificates certifying NACE MR0103, NACE MR0175
  • Heat Treatment Charts
  • Additional Testing from NABL approved Laboratory required as per the client
  • Letter of Guarantee
  • Material Test Certificates as per EN 10204 3.1, EN 10204 3.2
ss 904l Round bar
ss 904l Round bar


When it comes to a deal or a negotiation, obviously it cannot be with zero error. There are some problems that customers typically face. These are :-

  • Non availablity of a product
  • Packaging Defects
  • Late Deliveries
  • Material Inconistent with standards
  • Dubious Practices
  • Product Performance
  • Commission may result in high pricing of Goods.

♦ Marking & Packing ♦

Products are packed to make sure that there is no harm during transportation. In case of exports, conventional business appearance is done in wood made cases. All fittings and flanges are noticeable with Quality, Lot No, Size, Level and our business indicate. On special demands we can also, make customized tagging on our products.

♦ Price Basis ♦

We can provide any of the following cost foundation based upon on your requirement:

  • Ex-works
  • FOB Nhava Sheva
  • CFR, CIF, CPT your location port
  • Door to Entrance Distribution Responsibility Compensated as well as Duty Unpaid

♦ Delivery Time ♦

If the products are available in stock, we take 2 days from the date of invoice of advance payment to clear the delivery and send it to slot. And in-case the products are not availabe in stock, plenty of your time taken for manufacturing relies on the size, amount and quality. However we can declare the fact that we can contest with anyone in Indian on Distribution efforts and most of plenty of your time our manufacturing time is the least. We have bound with powerful logistic associates in Indian which can perform any type of delivery activites and make sure that there is no wait in delivery.

♦ Inspection ♦

We welcome level sensible examination, last level examination from any of your associate or 3rd party examination organizations. We consistently have examinations continuous at our property from worldwide recommended Inspection Agencies such as TUV, Llyods, BVIS, SGS, DNV etc.

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