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40C8 Round Bars | 40C8 Flat Bars
IS 40C8 is designation of PLAIN CARBON STEEL.
The designation of plan carbon steel consists of the following three quantities.
- A figure indicating 100 times the average percentage of CARBON a letter C.
- A figure indicating 10 times the average percentage of MANGANESE.
As 40C8 indicates a plain carbon steel with
0.4% (40/100) CARBON,
0.8% (8/10) MANGANESE.
IS 40C8 also known as 080M40. Unalloyed medium carbon steel. IS 40C8 is a medium strength steel, good tensile strength. Suitable for shafts, stressed pins, studs, keys etc. Available as normalized or rolled IS 40C8 is supplied round drawn/turned, round hot rolled, hexagon, square, flats and plate. IS 40C8 is usually supplied untreated but can be supplied to order in the normalized or finally heat treated (quenched and tempered to ”Q” or “R” properties for limiting ruling sections up to 63mm), which is adequate for a wide range of applications.
Chemical Composition of 40C8 | C40 :
| Grade | C | Mn | Si | S | P | |
| 40C8 | Min | 0.35 | 0.60 | 0.10 | - | - |
| Max | 0.45 | 0.90 | 0.35 | 0.35 | 0.35 | |
Application of plain carbon steel:
Depending upon the percentage of carbon, plain carbon steels are classified into the following category:
- Low carbon steel
- Medium carbon steel
- High carbon steel
Some of the important applications of plain carbon steel are following below:
- 7C4 used for components made by severe drawing operation such as automobile bodies and hoods.
- 10C4 used for case hardened components such as cams and cam shafts, gudgeon pin, sprocket and spindle.
- 30C8 used for cold formed and case hardened parts such as socket, tie road, yoke, lever and rocker arm.
- 40C8 used for transmission shaft, crank shaft, connecting road, bolts, couplings, and cold headed parts.
- 45C8 used for machine tool spindle, transmission shaft, bolts and gears of large dimensions
- 50C4 used for transmission shaft,, worms, gears and cylinders.
- 55C8 used for components with moderate wear resistance such as gears, cam, sprocket, cylinder and key.
- 60C4 used for machine tool spindle, hardened bolt and pinion.
- 65C6 used to make coil and leaf spring.
Different designation of Carbon Steel IS 40C8 :
- SAE/AISI 1040
- BS 080M40
- IS C40 (OLD)
- UNS G10400
- AFNOR - XC42H1
- AISI - 1040
- BS - 080M40
- BS - 080A40
- BS - CS40
- DIN - Ck40
- EN - C40E
- GB - 40Mn
- GB - #40
- GOST - 40
- JUS - C.1434.2
- JUS - C.1434.1
- KS - SM40C
- UNE - C35k
- UNE - F.1140
- UNI - CS40
- UNS - G10400
- W-Nr - 1.1186
Client / Customer can procure smaller quantities of IS 40C8 / SAE / AISI 1040 Online ready stock from us at any designation by sending us an email at
We are also specialist in High speed steel, Hot die steel, Cold work tool steel, High carbon high chromium tool steel, Alloy steel, Carbon steel, Forging steel, and Bright bars. Having a rich industry experience of more than a decade, we are one of the most trusted organizations engaged in trading and supplying an exclusive range of Special Steels and we are stockiest & dealer of M2, M35, M42, H13, H11, D2, D3, CW-1, OHNS, HCHCR, SKD-11, Din-1.2379, Din-1.2714, P20, P20+S, P20+Ni, 42Crmo4, EN24, EN31, EN19, EN353, EN36C, EN41B, EN47, EN1A, EN8, EN8D, EN9, EN3B, EN8M, EN19, EN43B, EN32B, IS2062, SCM420,ASTM SA-36, ASTMSA105, SAE1018, SAE1020, SAE4140, SAE8620, 16MNCR5, 20MNCR5, C20, C35, C40, C45, C50, C60, CK45, 20C8, 40C8, 45C8, 55C8, C55MN75, SAE52100, S40C, S355J2G3. for various sizes from 16mm to 1000 mm in different sections like Round, Flat, Square, Hexagon plate and various profile conforming to IS, BS, ASTM, DIN and other international standards and specifications.
Cities we Supply our Carbon Steel 40C8 Round Bars to:
Mumbai, Lucknow, Coimbatore, Imphal, Mysore, Ratlam, Delhi, Kanpur, Darjeeling, Jalandhar, Nagpur, Solapur, Kolkata, Allahabad, Dehradun, Jammu, Nashik, Srinagar, Chennai, Ahmedabad, Faridabad, Jamshedpur, Bhadravati, Chattisgarh, Durgapur, Asansol, Hospet, Bellary, Visakhapatnam, Nellore, Surat, Bangalore, Chandigarh, Ghaziabad, Jhansi, Patna, Siliguri, Hyderabad, Amritsar, Noida, Kochi (Cochin), Mangalore, Indore, Vadodra, Bhubaneswar, Bikaner, Bhavnagar, Tirupur, Ankleshwar, Warangal, Agartala, Thoothukudi, We offer fastest delivery in India including Thiruvanthapuram, Jaipur, Aizawl, Guwahati, Kozhikode, Raipur, Vishakhapatnam, Jabalpur, Bhopal, Gwalior, Ludhiana, Rajahmundry, Thane, Agra, Bhubaneshwar, Gurgaon, Madurai, Rajkot, Varanasi, Bhilai, Haridwar, Meerut, Ranchi, Ahmednagar, Akola, Amravati, Aurangabad, Baramati, Beed, Bhandara, Bhiwandi, Buldhana, Chandrapur, Chimur, Dahanu, Dhule, Dindori, Erandol, Gadchiroli, Hatkanangle, Hingoli, Ichalkaranji, Jalgaon, Jalna, Karad, Khed, Yavatmal, Kolaba, Kolhapur, Kopargaon, Latur, Malegaon, Mumbai, Nagpur, Nanded, Nandurbar, Nashik, Osmanabad, Pandharpur, Parbhani, Rajapur, Ramtek, Ratnagiri, Raver, Sangli, Satara, Shirdi, Shirur, Solapur, Thane, Wardha, Washim, Andhra Pradesh, Jammu and Kashmir, Nagaland, Uttarakhand, Haryana, Lakshadweep, Arunachal Pradesh, Jharkhand, Odisha, West Bengal, Himachal Pradesh, Assam, Karnataka, Punjab, Andaman and Nicobar Islands, Puducherry, Bihar, Kerala, Rajasthan, Chandigarh, Meghalaya, Chhattisgarh, Madhya Pradesh, Sikkim, Dadar and Nagar Haveli, Mizoram, Goa, Maharashtra, Tamil Nadu, Daman and Diu, Tripura, Gujarat, Manipur, Telangana, Delhi, Uttar Pradesh in India, Faridabad, Fatehpur, Gandhidham, Gandhinagar, Ghaziabad, Greater Hyderabad, Greater Mumbai, Greater Warangal, Gurgaon, Guwahati, Gwalior, Haldia, Howrah, Hubballi-Dharwad, Hyderabad, Imphal, Indore, Jabalpur, Jaipur, Jalandhar, Jammu, Jamnagar, Jamshedpur, Jhansi, Jodhpur, Junagadh, Kakinada, Kalyan-Dombivali, Kanpur, Karnal, Kavaratti, Kochi, Kohima, Kolhapur, Kolkata, Kota, Lucknow, Ludhiana, Madurai, Mehsana, Mangalore, Mangaluru, Mira-Bhayandar, Moradabad, Morbi, Mumbai, Muzaffarpur, Mysore, Nagpur, Namchi, Nasik, Navi Mumbai, NDMC, Nellore, New Delhi, New Town Kolkata, Noida, Oulgaret, Pali, Panaji, Panipat, Panvel, Pasighat, Patiala, Patna, Pimpri-Chinchwad, Port Blair, Puducherry, Pune, Raipur, Rajkot, Ranchi, Raurkela, Industrial Township, Rourkela, Sagar, Salem, Satna, Secunderabad, Shaharanpur, Shillong, Siliguri, Silvassa, Solapur, Srinagar, Surat, Thane, Thanjavur, Thiruvananthapuram, Thoothukudi, Thrissur, Tiruchirapalli, Tirunelveli, Tirupur, Tumkur, Udaipur, Ujjain, Ulhasnagar, Vadodara, Vapi, Varanasi, Vasai-Virar, Vellore, Vishakhapatnam, Agartala, Agra, Agra Rampur, Ahmedabad, Aizawl, Ajmer, Aligarh, Allahabad, Alwar, Amaravati, Ambala, Ambattur, Ambernath, Amravati, Amritsar, Aurangabad, Bangalore, Bareilly, Belgaum, Bhagalpur, Bhavnagar, Bhilai, Bhiwandi, Bhopal, Bhubaneswar, Bidhannagar, Biharsharif, Bikaner, Bilaspur, Bokaro, Chandigarh, Chennai, Chittoor, Coimbatore, Cuttack, Dahod, Davanegere, Dehradun, Delhi, Dhanbad, Dharamsala, Dindigul, Diu, Durgapur.
Countries we Export our Carbon Steel 40C8 Round Bars to:
United States of America, Malaysia, UAE, Indonesia, Saudi Arabia, Iran, Qatar, India, China, United Kingdom, Singapore, Canada, Thailand, South Korea, Turkey, Philippines, Egypt, Germany, Italy, Japan, Russia, Vietnam, Australia, South Africa, Portugal, Morocco, Costa Rica, Kazakhstan, Netherlands, Mexico, Brazil, France, Spain, Taiwan, Nigeria, Bangladesh, Kuwait, Iraq, Ukraine, Poland, Jordan, Romania, Oman, Hong Kong, Venezuela, Colombia, Norway, Chile, Trinidad & Tobago, Greece, Czechia, Belgium, Sri Lanka, Cyprus, Angola, Myanmar (Burma), United Kingdom, Canada, South Korea, Thailand, Netherlands, Spain, Turkey, Australia, Mexico, Pakistan, Vietnam, Brazil, Philippines, France, Taiwan, Poland, South Africa, Russia, Nigeria, Kuwait, Czechia, Norway, Romania, Egypt, Oman, Sweden, Belgium, Hong Kong, Israel, Colombia, Switzerland, Denmark, Finland, Argentina, Venezuela, Peru, Ukraine, Chile, Bangladesh, Portugal, Ireland, Austria, Algeria, Greece, Iraq, New Zealand, Slovakia, Hungary, Kazakhstan, Slovenia, Lithuania, Serbia, Sri Lanka, Bahrain, Bulgaria, Morocco, Tunisia, Croatia, Jordan, Ecuador, Trinidad & Tobago, Estonia, Azerbaijan, Ghana, Lebanon, Cyprus, Dominican Republic, Latvia, Libya, Costa Rica, Cambodia, Macedonia (FYROM), Belarus, Jamaica, Palestine, Turkmenistan, Afghanistan, Bahrain, Costa Rica, Egypt, Iraq, Jordan, South Korea, Kazakhstan, Sri Lanka, Lithuania, Norway, Oman, Philippines, Poland, Qatar, Russia, Vietnam, South Africa, Nigeria, Mexico, Turkey, Hungary, Algeria, Angola, Argentina, Austria, Azerbaijan, Bangladesh, Belarus, Belgium, Bhutan, Bolivia, Bulgaria, Croatia, Czech Republic, Estonia, Finland, Greece, Italy, Japan, Libya, Romania, Thailand, Trinidad & Tobago,Tunisia, Ukraine, Yemen, Hong Kong, Gabon, China, Portugal, Switzerland, New Zealand, Sweden, Slovakia, Kenya, Lebanon, Morocco, Mongolia, India, United States, United Arab Emirates, Canada, Pakistan, Peru, Chile, Spain, France, United Kingdom, Indonesia, Israel, Iran, Kuwait, Mexico, Malaysia, Nigeria, Serbia, Singapore, Taiwan, Chile, Venezuela, Ecuador, Saudi Arabia, Netherlands, Brazil, Colombia, Ghana, Iran, Denmark, Poland, Australia.