High-Strength Carbon Steel Circles & Rings – Available in Grades IS 2062 E250, E350, E410 & EN Series – Surface Options Include HR, Shot Blasted, Oiled, and Machined – Used in Flanges, Gear Blanks, Base Plates, and Ring Forgings.
We are a reputed manufacturer and supplier of premium Carbon Steel Circles and Rings, offering precision-engineered products designed for critical industrial applications. Our carbon steel circles and rings are produced using advanced cutting and rolling techniques to ensure accurate dimensions, smooth edges, and superior mechanical properties. Manufactured in compliance with international standards such as ASTM A105, ASTM A516, and EN 10028, these products are trusted worldwide for their strength and reliability.
Our Carbon Steel Circles and Rings are available in a wide range of sizes, with thicknesses from 5 mm up to 100 mm, and diameters ranging from 100 mm to over 3000 mm. We supply various grades including CS ASTM A105, ASTM A350 LF2, ASTM A516 Grade 70, and EN 10028 P235GH, meeting diverse requirements for pressure vessels, flanges, and heavy machinery components. Each product batch undergoes rigorous quality inspection and is delivered with full mill test certificates (MTC) to ensure traceability and compliance.
These carbon steel circles and rings find extensive use in the manufacturing of flanges, gears, valves, rings for heavy machinery, and structural components across multiple industries. Their excellent tensile strength, weldability, and impact resistance make them ideal for applications in oil & gas, petrochemical, power generation, and heavy engineering sectors. The products perform reliably in harsh environments, including high-pressure and high-temperature conditions, ensuring long service life and safety.
Our key target markets include Europe, Russia, Saudi Arabia, Oman, Qatar, and the USA, where there is strong demand for high-quality carbon steel circles and rings. We provide customized solutions, competitive pricing, and timely delivery to support projects across these regions. With a commitment to quality and customer satisfaction, we serve as a trusted partner for carbon steel circles and rings, meeting the stringent requirements of global industrial standards.
Precision Carbon Steel Circles & Rings – Supplied as Flange Rings, Spacer Rings, Round Blanks, and Washers – Available in Sizes from OD 50mm to 2000mm, Thickness 3mm to 100mm – Manufactured to ASTM A36, ASTM A516, ASTM A105 Standards.
Carbon Steel Circles & Rings Specifications
| Product | Carbon Steel Circles & Rings |
| Grades | A36, A105, A516 Gr 60/70, A350 LF2, EN8, EN9, EN19, EN24, C45, C55, C60 |
| Standards | ASTM A36, A105, A516, A350, EN Series, ASME, DIN |
| Size Range | Diameter: 50mm to 2000mm (2” to 80”) Thickness: 5mm to 150mm |
| Form | Solid Circles, Forged Rings, Rolled Rings, Flame Cut Blanks |
| Types | Hot Rolled, Forged, Machined, Flame Cut |
| Surface Finish | Black, Bright, Rough Machined, Polished, Shot Blasted |
| Manufacturing Methods | Forging, Rolling, Flame Cutting, CNC Machining |
| Applications | Flange Manufacturing, Pipe Fittings, Valves, Gear Blanks, Heavy Engineering, Oil & Gas |
| Properties | High Strength, Toughness, Weldability, Machinability |
| Certifications | ISO 9001:2015, EN 10204 3.1, NACE MR0175, PED 2014/68/EU |
Types of Carbon Steel Circles & Rings
Blank Circles / Discs
Supplied in custom diameters and thicknesses as per client specifications.
Flange Rings
Rings used as components for flanges in piping systems, pressure vessels, etc.
Gasket Rings
Gasket Rings are Available in standard and custom sizes as per ASME or DIN specifications.
Spacer Rings
Rings used to maintain space between mechanical parts commonly used in equipment.
Washer Rings
Smaller rings used as washers for load distribution under bolts and nuts.
Split Rings
C-shaped or snap-fit rings used to hold assemblies in grooves or shafts.
Profile Cut Rings
Custom-shaped rings cut from plates using CNC, laser, or waterjet, for specific machinery.
Forged Rings
Heavy-duty rings forged for strength, used in aerospace, marine industry or heavy machinery.
Equivalent of Carbon Steel Circles
| ASTM | EN (Europe) | DIN (Germany) | BS (UK) | JIS (Japan) | IS (India) |
|---|---|---|---|---|---|
| A36 | S235JR | St37-2 | 43A | SS400 | IS 2062 Gr A |
| A516 Gr 60 | P265GH | HI | 161-430A | SPV235 | IS 2002 Gr 1 |
| A516 Gr 70 | P355GH | 17Mn4 | 161-430B | SPV355 | IS 2002 Gr 2 |
| A105 | C22.8 | 1.0460 | 360C | SF440A | IS 1875 Gr 1 |
| A350 LF2 | P355N | 1.0562 | 50D | SB450 | IS 1875 Gr 2 |
| EN8 (C40/C45) | C45E | 1.1191 | 080M40 | S45C | IS 1570 C45 |
| EN9 (C55) | C55E | 1.1203 | 070M55 | S55C | IS 1570 C55 |
| EN19 | 42CrMo4 | 1.7225 | 708M40 | SCM440 | IS 5517 |
| EN24 | 34CrNiMo6 | 1.6582 | 817M40 | SNCM439 | IS 1570 |
Chemical Composition of MS Rings
| Grade | C (%) | Mn (%) | P (%) | S (%) | Si (%) | Other Elements |
|---|---|---|---|---|---|---|
| A36 / IS 2062 | ≤ 0.26 | 0.60 – 0.90 | ≤ 0.04 | ≤ 0.05 | ≤ 0.40 | — |
| A516 Gr 60 | ≤ 0.21 | 0.75 – 1.20 | ≤ 0.035 | ≤ 0.035 | 0.13 – 0.45 | — |
| A516 Gr 70 | ≤ 0.27 | 0.85 – 1.20 | ≤ 0.035 | ≤ 0.035 | 0.13 – 0.45 | — |
| A105 | ≤ 0.35 | 0.60 – 1.05 | ≤ 0.035 | ≤ 0.040 | ≤ 0.35 | Cu ≤ 0.40, Ni ≤ 0.40 |
| EN8 (C40/C45) | 0.40 – 0.45 | 0.60 – 0.90 | ≤ 0.04 | ≤ 0.05 | ≤ 0.40 | — |
| EN9 (C55) | 0.50 – 0.60 | 0.60 – 0.90 | ≤ 0.04 | ≤ 0.05 | ≤ 0.40 | — |
| EN19 (42CrMo4) | 0.38 – 0.45 | 0.60 – 0.90 | ≤ 0.035 | ≤ 0.035 | 0.10 – 0.40 | Cr 0.90 – 1.20, Mo 0.15 – 0.30 |
| EN24 (34CrNiMo6) | 0.36 – 0.44 | 0.45 – 0.70 | ≤ 0.035 | ≤ 0.035 | 0.10 – 0.35 | Cr 1.30 – 1.70, Ni 1.30 – 1.70, Mo 0.15 – 0.30 |
Mechanical Properties of Carbon Steel Circles & Rings
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| A36 / IS 2062 | 400 – 550 | 250 min | 20 – 23 | 119 – 159 |
| A516 Gr 60 | 415 – 550 | 220 min | 21 min | 137 – 187 |
| A516 Gr 70 | 485 – 620 | 260 min | 21 min | 149 – 197 |
| A105 | 485 min | 250 min | 22 min | 170 – 207 |
| EN8 (C40/C45) | 550 – 700 | 280 – 300 | 16 – 18 | 170 – 220 |
| EN9 (C55) | 600 – 800 | 300 – 350 | 12 – 14 | 200 – 240 |
| EN19 (42CrMo4) | 850 – 1000 | 650 – 800 | 13 – 15 | 248 – 302 |
| EN24 (34CrNiMo6) | 850 – 1000 | 680 – 850 | 13 – 16 | 250 – 320 |
Dimension Chart of Carbon Steel Circles
| Nominal Sizes in (Inch) | 19 Gauge | 24 Gauge | 22 Gauge | 20 Gauge | 18 Gauge | 26 Gauge |
|---|---|---|---|---|---|---|
| .4.5″ | 0 – 085 | 0.049 | 0 – 062 | 0 – 080 | .0 – 107 | 0 – 040 |
| 9″ | 0 – 330 | 0 – 178 | 0 – 230 | 0 – 301 | 0 – 388 | 0 – 145 |
| 6.5″ | 0 – 153 | 0 – 093 | 0 – 128 | 0 – 150 | 0 – 200 | 0 – 074 |
| 7″ | 0 – 190 | 0 – 107 | 0 – 136 | 0 – 176 | 0 – 235 | 0 – 088 |
| 8″ | 0 – 240 | 0 – 140 | 0 – 180 | 0 – 230 | 0 – 307 | 0 – 115 |
| 15″ | 0 – 860 | 0 – 495 | 0 – 650 | 0 – 808 | 1 – 080 | 0 – 405 |
| 10″ | 0 – 380 | 0 – 220 | 0 – 280 | 0 – 360 | 0 – 480 | 0 – 180 |
| 12″ | 0 – 540 | 0 – 318 | 0 – 403 | 0 – 518 | 0 – 690 | 0 – 253 |
| 14″ | 0 – 750 | 0 – 430 | 0 – 558 | 0 – 708 | 0 – 940 | 0 – 352 |
| 16″ | 0 – 960 | 0 – 563 | 0 – 736 | 0 – 921 | 1 – 228 | 0 – 460 |
| 18″ | 1 – 200 | 0 – 712 | 0 – 907 | 1 – 116 | 1 – 595 | 0 – 683 |
| 5.5″ | 0 – 119 | 0 – 066 | 0 – 085 | 0 – 109 | 0 – 146 | 0 – 054 |
| 11″ | 0 – 450 | 0 – 266 | 0 – 338 | 0 – 435 | 0 – 580 | 0 – 218 |
| 13″ | 0 – 640 | 0 – 371 | 0 – 608 | 0 – 508 | 0 – 811 | 0 – 304 |
| 7.5″ | 0.212 | 0 – 123 | 0 – 157 | 0.201 | 0.270 | 0 – 100 |
| 5″ | 0 – 095 | 0 – 055 | 0 – 070 | 0 – 090 | 0 – 120 | 0 – 045 |
| 20″ | 1 – 400 | 0 – 880 | 1 – 120 | 1 – 340 | 1 – 920 | 0 – 785 |
| 8.5″ | 0 – 270 | 0 – 156 | 0 – 202 | 0 – 262 | 0 – 347 | 0 – 130 |
| 17″ | 1 – 080 | 0 – 635 | 0 – 809 | 0 – 940 | 1 – 382 | 0 – 560 |
| 6″ | 0 – 136 | 0 – 079 | 0 – 100 | 0 – 130 | 0 – 172 | 0 – 064 |
| 9.5″ | 0 – 342 | 0 – 198 | 0 – 252 | 0 – 324 | 0 – 472 | 0 – 162 |
| 19″ | 1 – 350 | 0 – 794 | 1 – 010 | 1 – 300 | 1 – 732 | 0 – 750 |
Carbon Steel Rings Weight Chart
| Diameter (mm) | Thickness (mm) | Weight (kg) |
|---|---|---|
| 100 | 0.5 | 0.35 |
| 150 | 0.8 | 0.90 |
| 200 | 1.0 | 1.57 |
| 250 | 1.2 | 2.45 |
| 300 | 1.5 | 3.93 |
| 350 | 2.0 | 5.99 |
| 400 | 2.5 | 8.73 |
| 450 | 3.0 | 11.83 |
| 500 | 3.5 | 15.38 |
| 600 | 4.0 | 21.25 |
| 700 | 5.0 | 30.43 |
| 800 | 6.0 | 40.80 |
| 900 | 8.0 | 63.62 |
| 1000 | 10.0 | 88.25 |
| 1200 | 12.0 | 127.47 |
| 1500 | 15.0 | 196.35 |
Worldwide Supply of Carbon Steel Circles & Rings
Russia, Bahrain, Cyprus, Egypt, Iran, Iraq, Israel, Jordan, Kuwait, Lebanon, Oman, Palestine, Qatar, Saudi Arabia, Syria, Turkey, United Arab Emirates (UAE), Yemen, United States of America (USA), Albania, Andorra, Austria, Belarus, Belgium, Bosnia and Herzegovina, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Liechtenstein, Lithuania, Luxembourg, Malta, Moldova, Monaco, Montenegro, Netherlands, North Macedonia, Norway, Poland, Portugal, Romania, San Marino, Serbia, Slovakia, Slovenia, Spain, Sweden, Switzerland, Ukraine, United Kingdom, Vatican City.
