EN 8 Carbon Steel
We are EN 8 Carbon Steel Manufacturers, Suppliers, and Exporters in Mumbai, India. STEEL MART is an ISO 9001:2015 certified company established in 1986, with decades of experience in supplying high-quality carbon steel products to various industries. We specialize in manufacturing and supplying EN 8 Carbon Steels (BS 970 080M40) that meet national and international quality standards for general engineering, automotive, and heavy machinery applications. EN 8 Carbon Steel is an unalloyed medium carbon steel known for its high tensile strength, good wear resistance, excellent machinability, and capability for surface hardening. This grade is widely used in engineering components requiring higher strength and toughness than mild steel. EN 8 is typically supplied in as-rolled, normalized, or bright drawn condition, ensuring consistent and reliable mechanical performance. This carbon steel grade is widely used for manufacturing crankshafts, axles, gears, shafts, studs, bolts, and hydraulic rams.
Our EN 8 Carbon Steels are 100% Prime ā Tested & Guaranteed, ensuring precise chemical composition, dimensional accuracy, and consistent mechanical properties. Each product is supplied with proper Mill Test Certificates (MTC) confirming compliance with BS 970 / EN standards. STEEL MART follows strict quality control procedures and ensures timely delivery.
What is EN 8 Carbon Steel?
EN 8 Carbon Steel (BS 970 080M40) is an unalloyed medium carbon steel grade suitable for applications requiring higher strength and wear resistance than mild steel. Supplied in bright drawn, normalized, or quenched and tempered conditions, it provides high tensile strength, good toughness, and excellent machinability for heavy-duty engineering components.
High Tensile Strength
Delivers superior strength for heavy loads and high stress.
Good Machinability
Easily turned, drilled, and shaped for precision gears and shafts.
Superior Wear Resistance
Medium carbon structure offers long life against surface wear.
Flame & Induction Hardening
Can be surface-hardened up to 55-60 HRC for high friction areas.
Good Toughness
Resists shock loading and torsional fatigue effectively.
Proven Reliability
Strict composition control guarantees reliable machinery performance.
Why Choose STEEL MART for EN 8 Carbon Steel
STEEL MART is the preferred choice for purchasing EN 8 Carbon Steel due to its strong reputation for quality and reliability. With over 40 years of experience in the steel industry, the company ensures that every product meets strict industry standards. The company follows strict quality inspection procedures to ensure that every EN 8 Carbon Steel product meets international standards.
Each product is carefully tested to ensure durability, strength, and performance. Customers trust STEEL MART for consistent quality, competitive pricing, and timely delivery. The company maintains a large inventory to meet urgent and bulk requirements efficiently. In addition to EN 8 Carbon Steels, STEEL MART also supplies a wide range of carbon steel and alloy steel products for various industrial applications.
Chemical Composition of EN 8 Carbon Steel
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.36 ā 0.44 % |
| Manganese (Mn) | 0.60 ā 1.00 % |
| Silicon (Si) | 0.10 ā 0.40 % |
| Sulphur (S) | 0.050 % Max |
| Phosphorus (P) | 0.050 % Max |
This chemical composition ensures high tensile strength and hardenability.
Equivalent Grades of EN 8 Carbon Steel
| Standard | Equivalent Grade |
|---|---|
| BS 970 | 080M40 / EN 8 |
| AISI / SAE | 1040 / 1045 |
| DIN / W.Nr. | C45 / 1.0503 |
| EN | C45E / 1.1191 |
| JIS | S45C |
These equivalent grades ensure global compatibility across projects.
Mechanical Properties of EN 8 Carbon Steel
The mechanical properties of EN 8 Carbon Steels make them suitable for high-stress machinery parts. In normalized or quenched & tempered condition, this grade delivers superior tensile strength and hardness.
Heat Treatment & Processing of EN 8 Carbon Steel
EN 8 Carbon Steels respond well to heat treatment to enhance mechanical strength.
Normalizing
Heated to 830Ā°Cā860Ā°C and air-cooled to refine grain structure.
Hardening (Quenching)
Heated to 830Ā°Cā860Ā°C and quenched in oil or water for high strength.
Tempering
Reheated to 550Ā°Cā660Ā°C to adjust hardness and improve toughness.
Induction / Flame Hardening
Localized heating to achieve surface hardness up to 55ā60 HRC.
EN 8 Carbon Steel Industry Applications
EN 8 Carbon Steels are widely used across multiple industrial sectors.
Automotive Components
Used for crankshafts, axles, and steering arms.
Heavy Engineering
Used for gears, sprockets, and pinions.
Hydraulic Equipment
Used in hydraulic rams, pistons, and shafts.
High Stress Fasteners
Used for heavy studs, bolts, and keyways.
Agricultural Machinery
Used in drive shafts and heavy-duty pins.
General Manufacturing
Used in press tools and machine tool parts.
Availability and Customization
At STEEL MART, we supply EN 8 Carbon Steels in a wide range of sizes and specifications.
| Diameter | Diameter ranging from 10 mm to 400 mm |
| Condition | Available in As-Rolled / Normalized / Q&T / Bright Drawn condition |
| Length | Standard lengths from 3 meters to 6 meters |
| Finish | Bright drawn, black hot rolled, and turned finish available |
| Customization | Custom cut sizes available as per project requirements |
| Services | Machining, cutting, turning, and grinding services available |
| Certification | Supplied with Mill Test Certificates and inspection reports |
Our strict quality control ensures consistent quality.
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EN 8 Carbon Steel (BS 970 080M40) is a high-performance medium carbon unalloyed engineering steel widely used in automotive, hydraulic, and heavy machinery manufacturing. With its superior tensile strength, excellent wear resistance, and heat treatment capability, it provides long-term reliability for crankshafts, axles, gears, and hydraulic rams. Supplied by STEEL MART with strict quality control and Mill Test Certification, EN 8 Carbon Steel is a dependable solution for engineering applications.
Frequently Asked Questions
Common answers regarding EN 8 Carbon Steel specifications and parameters.
It offers a higher tensile strength and wear resistance compared to mild steel, along with excellent machinability.
Yes, it can be through-hardened by quenching and tempering or surface-hardened by flame/induction hardening.
BS 970 080M40, AISI 1040 / 1045, and DIN C45 (1.0503).
Induction or flame hardening can achieve surface hardness levels up to 55 to 60 HRC.
Round bars, Flat bars, Hex bars, Plates, Sheets, and custom cut sizes.