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ASTM A276 AISI 304 Stainless Steel Round Bar Suppliers

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ASTM A276 SS 304 Bars, 304 Stainless Steel Bar, SS 304 Round Bar, Stainless Steel Bars, Stainless Steel UNS S30400 Forged Bar, 304 Black Bars, Stainless Steel Round Bar, Stainless Steel 304 Rectangle Bar Exporter, Stainless Steel 304 Bar Suppliers in Mumbai, India

SS Round Bar, 304 Stainless Steel, Suppliers, Manufacturers in India, JIS SUS 304 Flat Bar Exporter, 304 SS Square Bar, 304 SS Bar Leading Manufacturer, Stainless Steel 304 DIN 1.4301 Bar & Rod, Manufacturers & Suppliers of Stainless Steel 304 Black Round Bar, Stainless Steel 304 Polish Bar, Stainless Steel 304 Flat Bar


Our company manufactures Stainless Steel Bright Bars, Mild Steel Bright Bars, Alloy Steel Bright Bars, as well as many other Stainless Steel Materials and Grades. Our manufacturing unit meets international quality standards, making us one of INDIA’s top 10 stainless steel bright bar exporters.

Tri Alloys can manufacture AISI 304 Grades Steel Round Bars, Hex Bars, Forged Bars, Hollow Bars, and Square Bars with special emphasis on 200 series (low nickel).

Stainless 304 Round Bar Definition is Recognized as the Prominent Manufacturer, Exporter, and Supplier of a broad assortment of Stainless Steel 304 Round Bar. The offered SS 304 Round Bar is designed with utmost precision in conformity with international quality standards.

In the manufacturing industry, or in any industry that relies on machinery, steel bars are a core component. Among its applications are automotive, textile, fabrication, construction, cement, shipbuilding, paper and pulp, defense, heavy earth moving equipment, and aerospace.

A479 refers to ASME SA479 grade 304 round bars used in boilers and pressure vessels, whereas A276 refers to ASME SA276 grade 304 rods for reforging and free machining. ASTM a276 type 304 round bars come in a variety of conditions, including A, H, B, S, and T.

There are different requirements for furnishing in each state. The condition A indicates that the bar has been annealed, and the condition H indicates that it has been hardened and tempered at a relative temperature. Conditions T and S, on the other hand, indicate that the bar has been set and tempered at a relatively high temperature, Condition S indicates that it has been strain hardened or relatively lightly cold worked, and Condition B indicates that it has been cold worked severely. ASTM A479 type 304 bars undergo heat treatment and corrosion testing.

Stainless Steel 304 Round Bar Definition is recognized as a leading manufacturer, exporter, and supplier of Stainless Steel 304 Round Bar. In compliance with international quality standards, our offered SS 304 Round Bar is designed with utmost precision.

It can be categorically stated that steel bars are a core component of any manufacturing industry, or any industry that relies on machinery for that matter. Applications include automotive, textile, fabrication, construction, cement, shipbuilding, paper and pulp, defense, heavy earth moving equipment, and aerospace.

As the standard “18/8” stainless steel, grade 304 is the most versatile and widely used stainless steel, available in a wider variety of products, forms, and finishes. It has excellent forming and welding properties. Due to its balanced austenitic structure, Grade 304 can be deeply dipped without intermediate annealing, making it ideal for manufacturing illustrated stainless parts like sinks, hollow-waASTM A276 AISI 304 Stainless Steel Round Bars has special forming and welding properties, which can be carried out either with or without filler. A post-annealing treatment may be required after welding. 304 stainless steel round bars are corrosion-resistant and perform well under many atmospheric conditions. As a result of oxidation and corrosion, these bars are highly resistant to chloride and other chemical reactions. 

At temperatures between 870°C and 925°C, stainless steel round bars provide sporadic service. These grades are composed of 8% nickel and 18% chromium, making them more substantial than other alloys. There are several types and sizes of these bars, including square, rectangle, hex, flat, etc. These bars range in size from 1-6 meters. They have a tensile strength of 75000 psi, and a yield strength of 30000 psi. E-applications often require special “304 DDQ” (Deep Drawing Quality) variants.

All industries demand ASTM A276 round bars because of their quality and high demand. For factory applications, these bars are enriched with excellent properties. 

304 Stainless Steel Bar Corrosion Resistance

In many environments and when in contact with various corrosive media, 304 has excellent corrosion resistance. Chloride-containing environments can cause pitting and crevice corrosion. Above 60°C, stress corrosion cracking can occur.

304 Stainless Steel Bar Heat Resistance

304 has good oxidation resistance in intermittent service up to 870°C and continuous service up to 925°C. If corrosion resistance in water is required, continued use at 425-860°C is not recommended. Due to its resistance to carbide precipitation, 304L is recommended.

304H is recommended when high strength is required at temperatures above 500°C and up to 800°C. Aqueous corrosion resistance will be retained by this material

304 Stainless Steel Bar Fabrication

Stainless steel should only be fabricated with stainless steel-specific tools. Before using any tool or work surface, it must be thoroughly cleaned. By taking these precautions, stainless steel is protected from cross-contamination by easily corroded metals that may discolor the surface.

304 Stainless Steel Bar Cold Working

The stainless steel 304 hardens readily. Often, cold working methods require an intermediate annealing step to alleviate work hardening and prevent tearing or cracking. During annealing, internal stresses should be reduced and corrosion resistance should be optimized.

304 Stainless Steel Bar Hot Working

Forging methods that require hot working should be performed after uniform heating to 1149-1260°C. To ensure maximum corrosion resistance, the fabricated components should be rapidly cooled.

304 Stainless Steel Bar Machinability

Machinability of 304 is good. The following rules can be used to enhance machining:

It is important to keep cutting edges sharp. Excess work hardening is caused by dull edges.

The cuts should be light, but deep enough to prevent work hardening.

Swarf should be kept clear of the work area by using chip breakers.

Due to austenitic alloys’ low thermal conductivity, heat concentrates at the cutting edges. Consequently, coolants and lubricants must be used in large quantities.

Heat treatment cannot harden 304 Stainless Steel Bars Heat Treatment

304 stainless steel.

After heating to 1010-1120°C, rapid cooling is used for solution treatment or annealing.

304 Stainless Steel Bar Weldability

The fusion welding performance of type 304 stainless steel is excellent. For stainless steel 304, grade 308L filler rods and electrodes are recommended. Post-weld annealing may be necessary for heavy welded sections. If post-weld heat treatment is not possible, grade 321 may be used.

Why use 304 Stainless Steel Bar

  • Austenitic stainless steels are extensively used to force down to liquid helium temperatures (-269°C). In impact toughness tests, there is no clearly defined transition from ductile to brittle fracture.
  • From ambient to 1100 degrees Celsius, stainless steel is used in a variety of applications.
  • As ferritic types have lower strengths at elevated temperatures than austenitic types, they may be limited to lower temperatures in practice. Extended exposure to temperatures over 450°C can also cause embrittlement in ferritic types.
  • 304 stainless steel round bars are suitable for most processing techniques and can be used indoors and outdoors. Semi-smooth, dull grey finish with sharp, defined edges and accurate dimensions throughout.
  • Aside from its high strength and corrosion resistance, 304 stainless steel is ideal for shelves, brackets, braces, sculptures, and other architectural applications. Chemical processing, food and beverage processing, and aerospace applications also use it.

304 Stainless Steel Bar Useful Information

You can also read about the following:

  • Steel bar Comparative/similar specifications
  • Steel bar Standards and specifications by country
  • Steel bar Standards and specifications by the company

1.4301 Bar and Section

Types 1.4301 and 1.4307 are grades 304 and 304L, respectively. The most versatile and widely used stainless steel is type 304. Some people still refer to it by its old name, 18/8, derived from its nominal composition of 18% chromium and 8% nickel.

304 stainless steel is an austenitic grade that can be deeply drawn. Due to this property, 304 is the most commonly used grade in sinks and saucepans.


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Specification of ASTM A276 AISI 304 Stainless Steel Round Bar

SS 304 304S31 S30400 SUS 304 X5CrNi18-10 1.4301 1.4301 08Х18Н10 Z7CN18‐09


Standards ASTM, ASME
Designation A 276, SA 276
Grade Stainless steel 304 Round Bars

Inox 304 Round Bars

FORM: Rod, Solid Round

ASTM: ASTM A276-10 (Standard Specification for Stainless Steel Bars and Shapes)

Alloy: 304

Characteristics: Semi-smooth, dull grey finish. Accurate dimensions throughout length.

Workability: Good candidate for some processing techniques. Great corrosion resistance.

Applications: Designed for close tolerance. Shafts, Hinges, Dowels

Stainless Steel Bar Specifications

ASTM A276 This specification encompasses cold-finished or hot-finished bars, including rounds, squares, and hexagons, and hot-rolled or extruded shapes, such as angles, tees, and channels in the more commonly used types of stainless steels.
ASTM A479 This specification includes cold and hot finished stainless steel bars, including rounds, squares, and hexagons, and hot-rolled or extruded shapes such as angles, tees, and channels.
ASTM A484 This specification includes wrought stainless steel bars, shapes, forgings, and billets or other semi-finished materials, except wire, for forging. The materials are available in four types of conditions.
ASTM A582 This specification includes cold or hot finished bars, which are suitable for machining processes. This specification includes rounds, squares, and hexagons, from common types of stainless free-machining steels.
ASTM B473 This specification includes nickel alloy bar & wire, which can be produced in a solution-annealed condition, stabilised-annealed condition, or annealed condition.

ASTM A276 AISI 304 Stainless Steel Round Bar Chemical Composition

Grade C Mn Si P S Cr Mo Ni N
SS 304 0.08 max 2 max 0.75 max 0.040 max 0.030 max 18 – 20 8 – 11

ASTM A276 AISI 304 Stainless Steel Round Bar Mechanical & Physical Properties

Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
8.0 g/cm3 1400 °C (2550 °F) Psi – 75000 , MPa – 515 Psi – 30000 , MPa – 205 35 %

ASTM A276 AISI 304 Stainless Steel Round Bar Condition

H&T Hardened and tempered.
ANN Annealed
PH Precipitation hardened.


ASTM A276 AISI 304 Stainless Steel Round Bar Sizes

Type SIZES (mm) SIZES (Inches) ISO Tolerance
Cold Drawn and Polish 3.00 – 75.00 1/8 – 3.00 h8-h9-h10-h11
Cold Drawn and Ground 10.00 – 75.00 5/6 – 2.50 h8-h9-h10-h11
Peeled and Polished 40.00 – 150.00 1.50 – 6.00 h11, h11-DIN 1013
Peeled and Ground 20.00 – 50.00 3/4 – 2.00 h9-h10-h11


Different designations & equivalent steel number of ASTM A182 F1: ASTM A213 T1, A335 P1, A182 F1, A387Gr.1

European EU EN: 16Mo3

USA AISI / ASTM: A204Gr.A, A204Gr.B

Germany DIN,WNr: 1.5415, 15Mo3, 16Mo3

Japan JIS: STBA12

France AFNOR: 15D3

England BS: 1503-243B, 240, 243

Italy UNI: 15Mo3, 16Mo3

Spain UNE: 16Mo3

Sweden SS: 2912

Poland PN: 16M

Czechia CSN: 15020

Austria ONORM: 15Mo3KW

Inter ISO: F26, P26, TS26

Forging Specification: A182 F1

Common Designation: C-1/2 Mo Low Alloy Steel

Casting Grade: ASTM A217 Grade WC1



Other Equivalent Alloy Steel Round Bar & Flat Bar

Material Group Common Name Type UNS Forging Spec. Casting Spec. Equivalent DIN DIN W. No Application
Low Alloy Steel Moly Steel C-1/2Mo K12822 A182-F1 cl2 A217-WC1 15M03 1.5415 Up to 470ºC* (875ºF)
Alloy Steel Chrome Moly 1.1/4Cr-1/2Mo K11572 A182-F11 cl2 A217-WC6 13CRM044 1.7335 Up to 593ºC (1100ºF)
2.1/4Cr-1Mo K21590 A182-F22 cl3 A217-WC9 10CRM0910 1.7380 Up to 593ºC (1100ºF), HP steam
5Cr-1/2Mo K41545 A182-F5/F5a A217-C5 12CRMO195 1.7362 High temp refinery service
9Cr-1Mo K90941 A182-F9 A217-C12 X 12 CrMo 9 1 1.7386 High temp erosive refinery service
9Cr-1Mo-V   A182-F91 A217-C12A X 10 CrMoVNb 9 1 1.4903 High pressure steam

ASTM A276 AISI 304 Stainless Steel Round Bar Equivalent Grades









SS 304



SUS 304





Bar – Up to 160mm Dia / Thickness

Mechanical Property


Proof Stress

190 Min MPa

Tensile Strength

500 to 700 MPa

Elongation A50 mm

45 Min %

Hardness Brinell

215 Max HB

304 Stainless Steel Bar Alloy Designations

Stainless Steel Grade 1.4301/304 also corresponds to the following designations but may not be a direct equivalent:






ASTM A276 AISI 304 Stainless Steel Round Bar Equivalent Grades

SS 304 S30400 1.4301 Z7CN18‐09 X5CrNi18-10 SUS 304 304S31 08Х18Н10

ASTM A276 AISI 304 Stainless Steel Round Bar Tolerances

Surface Finish Cond.
H 6 H 12 H 7 H 9 H 10 H 8 H 11
Turned Round Round Round Round
Polished Round Round Round Round Round Round Round
Drawn Round, Square, Hexagon Round Round Round, Square, Hexagon
Ground Round Round Round Round Round Round Round


Stainless Steel 304 Round Bar Range

SS 304 Round Bar Specification

ASTM A276 / ASTM A479 /ASTM A182 / ASME SA276 / ASME SA479 / ASME SA182

SS 304 Round Bar Manufacturing Process

Hot Rolled / Cold Rolled / Hot Forging / Rolling / Machining

SS 304 Round Bar Other Grades

202 / 304 / 304L / 304H / 309S / 310S / 316 / 316L / 316Ti / 317L / 321 / 321H / 347 / 347H / 904L etc.

UNS No. – UNS S30400, UNS S30403, UNS S31008, UNS S31620, UNS S31603, UNS S31603, UNS S31635, UNS S31703, UNS S32100, UNS S34700, UNS S34709, UNS S8904

DIN / EN No. – 1.4301, 1.4307, 1.4845, 1.4401, 1.4404, 1.4571, 1.4438, 1.4541, 1.4550, 1.4551, 1.4539

AFNOR: Z2 CN 18.10, Z 6 CND 17-11, Z 2 CND 17-12,Z3 CrNi 22.05 AZ

EURONORM: FeMi35Cr20Cu4Mo2, FeMi35Cr20Cu4Mo2, X1CrNiMo17 12 2, X3CrNiMo17 12 2, FeMi35Cr20Cu4Mo2, X2CrNiMoN 22.5.3

SS 304 Round Bar Dimension

Round Bars : Outside Diameter in the range of 4mm to 500mm

Bright Bars : Outside Diameter in the range of 4mm to 200mm

Hex Bars : 18mm to 57mm (11/16″ to 2-3/4″)

Square Bars : 18mm to 57mm (11/16″ to 2-3/4″)

Flat Bars : 1/2″to 10″in thickness range of 2 mm to 150mm, Custom Size Stainless Steel Flats available

SS 304 Round Bar Length

2 metres to 7.5 metres ( 8 feet to 24 feet), or Custom Length as per Requirement

SS 304 Round Bar Forms and Shape

Round, Square, Hex (A/F), Rectangle, Billet, Ingot, HRAP, Bright, Shaft, Forging Etc.

SS 304 Round Bar Finish

Black, Bright Polished, Rough Turned, NO.4 Finish, Matt Finish, BA Finish

SS 304 Round Bar Dimension Standard

ASTM A 484 / ISO h11 / ISO K12 Tolerances F8 / h8, h9, h10, h11, h12, k12, k13, A-484, EN-10060, DIN-1013 etc.

SS 304 Round Bar Heat Treatment

Condition A in which the bars are Annealed

Condition H in which the bars are Hardened and Tempered at a relative Temperature

Condition T in which the bars are Hardened and Tempered at a relatively High Temperature

Condition S in which the bars are Strain Hardened or relatively Light Cold Worked

Condition B in which the bars are Relatively severe Cold work.

Solution Annealed, Ageing and Double Ageing

SS 304 Round Bar Surface Finish

Centreless Ground & Belt Polished, up to Ra value = 0.2 um (12 RMS), and Grit Polished of up to 180 to 600

SS 304 Round Bar Chamfering

Available in 30°, 45° & 60° through fully automatic, both-end chamfering machine

SS 304 Round Bar Other Testing

NACE MR0175, IGC TEST, Intergranular Corrosion Test as per ASTM A262 Practice E, Charpy Impact Test, Macro, Grain Size, Hardness, Magnetic Particle Inspection (MPI), 100% tested thru Digital Ultrasonic Flaw Detector, as per ASTM A-388, EN 10308 (class 1to4),API 6A/ISO 10423:2003-PSL3,SEP 1920:1984 ( class A,B,C), MIL STD 2154 etc.

SS 304 Round Bar Value Added Services

Rolling, Drill, Punch, CNC Machining, Sand Blasting, Shot Blasting, Heat Treatment, Anti-rust Paint, Polishing

SS 304 Round Bar Packaging

Loose / Carat / Wooden Pallet / Wooden Box / Plastic Cloth Wraps

S304 Round Bar Shipment & Transportation

By Road – Truck / Train Partial Load, Full Load, By Sea – Break-bulk Conventional Vessel / FCL (Full Container Load) / LCL (Less Container Load) / 20 Feet Container / 40 Feet Container / 45 Feet Container / High Cube Container / Open Top Container, By Air – Freighter Civil Passenger and Cargo Planes

SS 304 Round Bar Material Test Certificate

Manufacturer Test Certificate As Per EN10204 3.1, 3.2 / Laboratory Test Certificate From NABL Approved Lab. / Under Third Party Inspection Agency Like SGS, TUV, DNV, LLOYDS, ABS, Bureau of Indian Standards BIS Approved ETC

SS 304 Round Bar Documentation

Commercial Invoice which includes HS Code / Packing List including net weight and gross weight, number of boxes, Marks and Numbers / Certificate of Origin legalised/attested by Chamber of Commerce or Embassy / Fumigation Certificates / Raw Material Test Reports / Material Traceability Records / Quality Assurance Plan (QAP) / Heat Treatment Charts / Test Certificates certifying NACE MR0103, NACE MR0175 / Material Test Certificates (MTC) as per EN 10204 3.1 and EN 10204 3.2 / Guarantee Letter / NABL approved Laboratory Test Reports / Welding Procedure Specification/Procedure Qualification Record, WPS/PQR / Form A for the purposes of the Generalised System of Preferences (GSP)


Types of ASTM A276 AISI 304 Stainless Steel Round Bars

  • ASTM A314 303 stainless steel round bars

  • ASTM A276 304 stainless steel round bars

  • ASTM A276 304L stainless steel round bars

  • ASTM A276 304H stainless steel round bars

  • ASTM A276 316 stainless steel round bars

  • ASTM A276 316L stainless steel round bars

  • ASTM A276 316H stainless steel round bars

  • ASTM A276 316Ti stainless steel round bars

  • ASTM A276 321 stainless steel round bars

  • ASTM A276 321H stainless steel round bars

  • ASTM A276 329 stainless steel round bars

  • ASTM A276 347 stainless steel round bars

  • ASTM A276 347H stainless steel round bars

  • ASTM A276 310 stainless steel round bars

  • ASTM A276 310S stainless steel round bars

  • ASTM A276 317 stainless steel round bars

  • ASTM A276 317L stainless steel round bars

  • ASTM A276 314 stainless steel round bars

  • ASTM A276 410 stainless steel round bars

  • ASTM A582 416 stainless steel round bars

  • ASTM A276 420 stainless steel round bars

  • ASTM A276 430 stainless steel round bars

  • ASTM A276 430F stainless steel round bars

  • ASTM A276 431 stainless steel round bars

  • ASTM A276 440C stainless steel round bars

  • ASTM A276 446 stainless steel round bars

  • ASTM A276 422 stainless steel round bars

  • ASTM B649 904L stainless steel round bars

  • 17-4 PH stainless steel round bars

  • 15-5 PH stainless steel round bars

  • 13-8 PH stainless steel round bars

  • Alloy A286 stainless steel round bars

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  • Nitronic 50 stainless steel round bars

  • Nitronic 60 stainless steel round bars

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Types of Round Bars

Black Bars, Bar, Bright Bar, Square Bar, Hex Bar, Rods

Applications Industry ASTM A276 AISI 304 Stainless Steel Round Bar

•   Thermal pipe plants

•   Pharmaceutical industry

•   Oil Refineries

•   Textile Industries

•   Nuclear plants

•   Chemical Industries

•   Dairy Products

•   Power Plant

•   Food Products

•   Petrochemicals industry

•   Sugar industry

•   Engineering industry

•   Chemical industry

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