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420 Stainless Steel Round Bar

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420 Stainless Steel Round Bar Suppliers & Manufacturer

420 Stainless Steel Round Bar

Sachin Steel Centre is a leading manufacturer and supplier of 420 stainless steel round bars, offering high-quality solutions to clients across India and internationally. Our facility specializes in producing 420 SS round bars with precision, adhering to strict quality standards and ensuring consistent performance for industrial applications.

Our stainless steel 420 round bars are manufactured using advanced techniques, including cold drawing, hot rolling, and annealing, to deliver superior hardness, tensile strength, and wear resistance. They are also suitable for structural and fabrication purposes in engineering, construction, and earth-moving equipment. With proper heat treatment, the bars can achieve exceptional hardness, abrasion resistance, and mechanical strength. At Sachin Steel Centre, quality is our top priority. Each batch of 420 SS round bars undergoes rigorous inspection and testing, including mechanical and chemical analysis, impact testing, and dimensional checks. We provide detailed documentation, including mill test reports, material certifications, and guarantee letters to ensure reliability and traceability for our clients.

Contact us today to discuss your requirements and get a tailored solution for your project.

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Table Of Content

About 420 Stainless Steel (SS) Round Bar

Stainless Steel 420 Round Bar is a premium martensitic stainless steel designed for applications requiring exceptional hardness, wear resistance, and moderate corrosion resistance. Known for its high strength and ability to withstand heavy-duty conditions. This grade of stainless steel ensures excellent toughness, high tensile strength, and superior surface finish after proper heat treatment. Its hardness and durability make it suitable for cutting tools, shafts, plunger rods, precision machinery parts, and industrial equipment. 

Due to its martensitic structure, the SS 420 bar can be heat-treated or tempered to achieve the desired hardness, improving resistance to abrasion and oxidation. Finishes include bright, polished, black, hot-rolled, and cold-drawn, allowing customization based on performance and aesthetic requirements. They perform exceptionally well in moderate corrosive environments, offer excellent fatigue life, and maintain phase stability under high stress. The ability to heat treat these bars enhances hardness and mechanical properties, while their excellent machinability ensures easy fabrication into components with precise tolerances.

Types of 420 Stainless Steel Round Bar

Hex Bar

SS 420 Hex Bar

Bright Bar

SS 420 Bright Bar

Rectangular Bar

SS 420 Rectangular Bar

Square Bar

SS 420 Square Bar

Polished Bar

SS 420 Forged Bar

Flat Bar

SS 420 Flat Bar

Request Quote on Types of SS 420 Round Bars
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Specification of Stainless Steel 420 Round Bar

Material Stainless Steel 420
Size Tolerances h10 and h11
Chamfering Available in 30°, 45° & 60° through fully automatic, both-end chamfering machine
Heat Treatment Annealed, Solution Annealed
Size range 12 mm – 46 mm (1/2 inch- 1 ¾ inch)
Flat Bar Size Range Thickness: 2 -100mm / Width: 10 to 500mm
Crack Test Magnetic Particle Inspection (MPI)
Length 2 meters to 7.5 meters ( 8 feet to 24 feet), or Custom Length as per Requirement
Available Forms Rod, Channel, Rectangle, Precision Ground, Blocks, Round, Threaded, Profiles, Rings, Round Rod, Triangle, Hollow, Half Round, Ingot, Square, Hex (A/F), Rectangle, Billet, Forging etc.
Tolerance H8, H10, H9, H11, H12, K10, H13K9, K12 K11 or as per clients’ requirements
Manufacturing Technique Hot Rolled, Cold Drawn, Cold Rolled, Forged
Surface Finish Cold (bright) drawn, centreless ground, peeled, Rough Turned, smooth turned, hot rolled, hot rolled annealed, Grinding, Bright, slit rolled edge, Polish, Centreless Ground & Black

Chemical Composition of 420 SS Round Bars

Grade C Mn Si P S Cr Ni
420 0.15
max		 1.00
max		 1.00
max		 0.04
max		 0.03
max		 min: 12.0
max: 14.0		 –

Equivalent Grades of 420 SS Round Bar

STANDARD WERKSTOFF NR. UNS JIS BS GOST AFNOR EN
SS 420 1.4021 S42000 SUS 420 J1 420S29 – – FeMi35Cr20Cu4Mo2

420 Stainless Steel Round Bars Size Chart

Nominal Diameter (mm) Nominal Diameter (Inches) Length (mm) Finish Options Tolerances Process
4 0.157″ 1000 – 6000 Bright, Polished h9 Cold Drawn
6 0.236″ 1000 – 6000 Bright, Polished h9 Cold Drawn
10 0.393″ 1000 – 6000 Bright, Polished h9 Cold Drawn
12 0.472″ 1000 – 6000 Bright, Polished h9 Cold Drawn
16 0.630″ 1000 – 6000 Bright, Polished h9 Cold Drawn
20 0.787″ 1000 – 6000 Peeled, Polished h11 Cold Drawn
25 0.984″ 1000 – 6000 Peeled, Polished h11 Cold Drawn
30 1.181″ 1000 – 6000 Peeled, Polished h11 Cold Drawn
40 1.575″ 1000 – 6000 Black, Rough Turned h11 Hot Rolled
50 1.969″ 1000 – 6000 Black, Rough Turned h11 Hot Rolled
60 2.362″ 1000 – 6000 Black, Rough Turned h13 Hot Rolled
80 3.150″ 1000 – 6000 Black, Rough Turned h13 Hot Rolled
100 3.937″ 1000 – 6000 Black, Rough Turned h13 Hot Rolled
150 5.906″ Custom Black, Rough Turned As per Spec Forged
200 7.874″ Custom Black, Rough Turned As per Spec Forged
250 9.843″ Custom Black, Rough Turned As per Spec Forged
300 11.811″ Custom Black, Rough Turned As per Spec Forged

Mechanical Properties of Stainless Steel 420 Round Bars

Tempering Temperature (°C) Tensile Strength (MPa) Yield Strength
0.2% Proof (MPa)		 Elongation
(% in 50mm)		 Hardness Brinell
(HB)
Annealed * 655 345 25 241 max
399°F (204°C) 1600 1360 12 444
600°F (316°C) 1580 1365 14 444
800°F (427°C) 1620 1420 10 461
1000°F (538°C) 1305 1095 15 375
1099°F (593°C) 1035 810 18 302
1202°F (650°C) 895 680 20 262

Stainless Steel 420 Bars Dimension Chart

Type Diameter / Width (mm) Length (mm) Tolerances Finish Options Standards Manufacturing Process
Round Bars 4 – 500 1000 – 6000 h9, h11, h13 Bright, Black, Peeled, Polished ASTM A276, ASTM A479, ASME SA276, ASME SA479 Hot Rolled, Cold Drawn, Forged
Square Bars 6×6 – 150×150 1000 – 6000 ±0.5mm Hot Rolled, Cold Drawn, Bright ASTM A276, ASTM A484 Hot Rolled, Cold Drawn
Flat Bars 3×10 – 100×500 1000 – 6000 ±0.5mm Mill Finish, Polished ASTM A276, ASTM A484 Hot Rolled, Sheared & Edged
Hex Bars 6 – 105 1000 – 6000 h11, h13 Cold Drawn, Polished ASTM A276, ASTM A479 Cold Drawn, Hot Rolled
Forged Bars 50 – 500 As Required As per spec Black, Rough Turned ASTM A182, ASTM A276 Forged, Rough Machined

420 Stainless Round Bars Weight Chart

Diameter Weight Chart Dia Weight Chart
(mm) per metre (kg) (in) per metre (kg)
3mm 0.06 1/8″ 0.06
4mm 0.10 3/16″ 0.14
5mm 0.16 1/4″ 0.25
6mm 0.22 5/16″ 0.39
7mm 0.30 3/8″ 0.56
8mm 0.40 7/16″ 0.77
10mm 0.62 1/2″ 1.00
12mm 0.89 9/16″ 1.22
14mm 1.22 5/8″ 1.56
15mm 1.40 11/16″ 1.89
16mm 1.59 3/4″ 2.25
18mm 2.01 7/8″ 3.07
20mm 2.48 1″ 4.03
22mm 3.00
24mm 3.57
25mm 3.88

A276 420 Round Bar Physical Properties

Tempering Temperature (°C) Tensile Strength (MPa) Yield Strength 0.2% Proof (MPa) Elongation (% in 50 mm) Hardness Brinell (HB) Impact Charpy V (J)
Annealed * 480 min 275 min 16 min – –
204 1475 1005 11 400 30
316 1470 961 18 400 36
427 1340 920 18.5 405 #
538 985 730 16 321 #
593 870 675 20 255 39
650 300 270 29.5 225 80

Applications of Stainless Steel 420 Round Bars

    • Petrochemical Industry
    • Chemical Industry
    • Oil and Gas Industry
    • Pulp & Paper Indusry
    • Power Plant Industry
    • Food Processing Industry
    • Pharmaceuticals Industry
    • Energy Industry
    • Aerospace Industry
Application Industries

Frequently Asked Questions About 420 stainless steel round bar

SS 420 Round Bar is a martensitic stainless steel known for its high hardness, strength, and corrosion resistance. It contains 12–14% chromium and a minimum of 0.15% carbon, making it suitable for applications requiring durability and wear resistance.

These bars are widely used in manufacturing valve parts, pump shafts, motor shafts, cutlery, surgical instruments, and components in the aerospace and automotive industries due to their excellent mechanical properties

Sachin Steel Centre provides SS 420 Round Bars in diameters from 4mm to 350mm and lengths ranging 1m to 6m, available in bright, polished, or black finishes to suit diverse industrial applications.

It typically contains 12–14% chromium, 0.15% minimum carbon, and small amounts of manganese, silicon, phosphorus, and sulfur.

Yes, SS 420 can achieve a mirror-like finish after proper heat treatment and polishing, making it suitable for decorative and functional applications.

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