Get a Quote

EN31 Round Bars / Alloy Steel Rods

En31 Round Bar Manufacturers, En31 Rod Suppliers.

Most Reliable Stockists, Suppliers & Exporters of En31 Bright Bar, En31 Round Bar, En31 Flat Bar, En31 Hexagon Bar, En31 Square Bar, En31 Steel Flat Bar, En31 Rectangular Bar in India, Indonesia, Singapore, Houston, USA, Canada, UK, Australia, UAE, and South Africa.

Buy En31 Rod, En31 Steel Bar, En31 Hex Bar, En31 Mild Steel Bar, En31 Steel Rod, Carbon & Alloy Steel En 31 Bright Bar, En31 Black Bar, En31 Forged Bar, En31 Ground Bar, En31 Hollow Bar in all Sizes at Market Leading Prices.

En31 Steel Bars & Rods

EN31 Steel is a quality High Carbon Alloy Steel which offers a high degree of hardness with compressive strength and abrasion resistance. SIddhgiri Tubes are well known EN31 Bright Round Bars and Rods Manufacturers, Stockists, Suppliers, and Exporters. We are only manufacturing from prime quality billets and blooms. The wide array of EN31 Round and Flat Bars which we manufacture for our clients are of high quality and these round bars are used for making machineries and OEM Auto components. These En 31 Hex and Square bars have been made keeping in mind the quality parameters which have been set by the industry in the market. EN31 Round Bar are always export and supply with the test certificates and can be supplied in bulk quantity as well as retail quantity as per buyers needs. EN31 alloy Steel round bars are supplied by us to various industries globally.

Heat uniformly and thoroughly at the selected tempering temperatures and hold for at least one hour per inch of total thickness.
Heat uniformly to 800°C, equalise, then furnace cool. (Hardness about 229 Brinell).
Stress Relieving:
If machining operations have been heavy or if the tool has an unbalanced section, remove stresses before hardening by heating up to 700°C, equalise, then cool slowly.
Heat uniformly to 800/820°C until heated through. Allow 30 minutes per inch of ruling section and quench immediately in oil. 
Forge at 1000°/1050°C.  Heat slowly, allowing sufficient time at the forging temperature for the steel to be thoroughly soaked through. Re-heat as often as necessary to keep the temperature above 850°C. After forging cool very slowly, preferably in a furnace

En 31 Round Bar Specifications

Grade EN31
Specification 100Cr6, AISI SAE E52100, 100Cr6, 2258, 100C6
Round Bar Size Diameter: 3-~800mm
Square Bar size 4 to 100mm
Flat Bar Size Thickness: 2 -100mm
Width: 10 to 500mm
Hex Bar Size 2-100mm A/F
Rectangles Size 33 x 30mm to 295 x 1066mm
Hollow Bar 32mm OD x 16mm ID to 250mm OD x 200mm ID)
Angle Bar Size 3mm*20mm*20mm~12mm*100mm*100mm
Channel Bar 80 x 40mm to 150 x 75mm section; 5.0 to 6.0mm thickness
Section 3.0 to 12.0mm thickness
Billet Size 1/2″ to 495mm Diameter
Finish Cold (bright) drawn, centreless ground,smooth turned, Rough Turned, Bright, peeled, hot rolled,
hot rolled annealed, slit rolled edge, Polish, Grinding, Centreless Ground & Black
Tolerance K9, K10, K11, K12, H8, H9, H10, H11, H12, H13, or as per clients’ requirements
Surface Polished, Bright, Cold Drawn, Hot Rolled Pickled, Sand Blasting Finished, Hairline
Condition Hardened & Tempered, Annealed
Technique en31 Hot Rolled, Cold Rolled, Cold Drawn, Forged Round Bar, Rods
Processing Bar cutting to 650mm
Form en31 Welding Rod, Round, Round Rod, Rings, Hollow, Rod, T-Bar, Channel Bar, Flat Bar, Square, Blocks,
Precision Ground Bar, Triangle, Rectangle, Hex (A/F), Threaded, Ingot, I/H Bar, Half Round Bar, Profiles, Billet, Forging etc.
En31 Steel Bars and Rods Conforms To NACE MR0175/ISO 15156

En 31 Steel Equivalent Grades

BRITISH BS 970:1991 535A99
BRITISH BS 970:1955 EN31

En31 Round Bar Chemical Composition

Carbon 0.95 / 1.10
Manganese 0.40 / 0.70
Silicon 0.10 / 0.35
Sulfur Max 0.050
Phosphorus Max 0.040
Chromium 1.20 – 1.60

En31 Round Rods & Bars Properties

Soft annealing °C Cooling Hardness HB
780-800 Furnace max. 207
Stress-relief annealing °C Cooling
600 – 650 Furnace
1st pre-heating °C 2nd and 3rd Hardening °C Quenching Tempering °C Hardness after Teperature HRC
up to approx. 400 in an air-circulating furnace 800 and 900 800-820 810 °C Oil ,Quench at least twice 150-200 61 – 63

En31 Steel Bar & Rod Available Shapes / Types

EN-31 Steel Polished Round Bar EN-31 Steel T-Bar
EN-31 Steel Square Bar EN-31 Steel Triangle Bar
EN-31 Steel Flat Bar EN-31 Steel Hex Bar
EN-31 Steel Hollow Bar EN-31 Steel Round Bar
EN-31 Steel Precistion Ground Bar EN-31 Steel Threaded Bar
EN-31 Steel Rods EN-31 Steel Half Round Bar

En31 Round Bars Sizes Charts

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
Cut to size on request (tolerance +2/-0 mm). Standard lengths of en31 Bars 2000 mm up to 6000 mm available
5.0 45.0
6.0 50.0
7.0 55.0
8.0 60.0
9.0 65.0
10.0 70.0
12.0 75.0
16.0 80.0
20.0 90.0
25.0 100.0
30.0 130.0
35.0 160.0
40.0 200.0

En31 Round Bars Surface Finish

CD Cold drawn P Polished
BD Bright drawn SRE Slit rolled edge
CG Centreless ground HF Hot finished
CF Cold finished HRAP Hot rolled annealed and pickled
P&T Peeled and turned RT Rough turned/peeled
ST Smooth turned PR Peeled and reeled

En31 Rods & Bars Condition

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

Why Choose Us To Buy En31 Bars & Rods?

  • State of the Art Manufacturing Facilities to product highest quality En31 Bars and Rods.
  • Technically Qualified Engineers & Professionals team Market experience En 31 Round Bars in confirmation with International standards.
  • Use of sophisticated machinery to give a perfect finish to our Mild Still En31 Round Bars.
  • Strong market networks to distribute En31 Hex Bars Cost-effective.
  • Self-Inspection Reports.
  • 100% commitment to Quality and Delivery of En31 Bright Bars.
  • Raw-Material Test Certificates.
  • Striving towards reduction of lead time.
  • More investments and keeping pace with advancing technologies.

En31 Round Bars and Rods Applications

  • Pumps/Electric Motor Industry
  • Automobile Industry
  • Defence Sector
  • Railways
  • Health & Sports
  • Agriculture
  • Oil & Gas
  • Textile Industry
  • Food Processing Industry
  • Houses & Fittings
  • Mining
  • Miscellaneous
Industrial Applications

Countries We Supply & Export En31 Bars & Rods

Afghanistan, Albania, Algeria, Armenia, Australia, Austria, Azerbaijan, Bahrain, Bangladesh, Belgium, Bhutan, Brazil, Bulgaria, Cameroon, Canada, Chile, Colombia, Congo, Costa Rica, Denmark, Egypt, Finland, France, Georgia, Germany, Ghana, Greece, Greenland, Haiti, Hong Kong, Iceland, India, Indonesia, Iran, Iraq, Ireland, Israel, Italy, Jamaica, Japan, Jordan, Kazakhstan, Korea, Kuwait, Lebanon, Macao, Malaysia, Mexico, Monaco, Myanmar, Nepal, Netherlands, New Zealand, Nigeria, Norway, Oman, Peru, Philippines, Poland, Portugal, Qatar, Romania, Saudi Arabia, Serbia, Singapore, Slovakia, South Africa, Spain, Sri Lanka, Sweden, Switzerland, Tanzania, Thailand, Tunisia, Turkey, Turkmenistan, Uganda, Ukraine, UAE, United Kingdom, USA, Uzbekistan, Viet Nam, Yemen.

Privacy Settings
We use cookies to enhance your experience while using our website. If you are using our Services via a browser you can restrict, block or remove cookies through your web browser settings. We also use content and scripts from third parties that may use tracking technologies. You can selectively provide your consent below to allow such third party embeds. For complete information about the cookies we use, data we collect and how we process them, please check our Privacy Policy
Consent to display content from Youtube
Consent to display content from Vimeo
Google Maps
Consent to display content from Google
Consent to display content from Spotify
Sound Cloud
Consent to display content from Sound
Translate »
Get a Quote
Send Inquiry Using WhatsApp