070M55 Carbon Steel
We are 070M55 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 070M55 Carbon Steels (BS 970 070M55 / EN9 / C55) that meet national and international quality standards for spring manufacturing, wear components, automotive, and heavy engineering applications. 070M55 Carbon Steel is an unalloyed high-medium carbon engineering steel known for its high tensile strength (650-850 MPa normalized / 850-1000+ MPa Q&T), excellent surface hardness, high wear resistance, and outstanding induction/flame hardenability (55-62 HRC). With carbon content balanced between 0.50% and 0.60%, 070M55 delivers higher strength, abrasion resistance, and edge retention compared to lower carbon grades, making it ideal for components subject to heavy friction and fatigue. 070M55 is typically supplied in hot rolled, cold drawn, normalized, or quenched and tempered (Q&T) condition, ensuring uniform mechanical properties and long-term durability. This carbon steel grade is widely used for manufacturing sprockets, gears, cams, heavy-duty shafts, cylinder rods, agricultural blades, industrial knives, keys, and spring clips.
Our 070M55 Carbon Steels are 100% Prime – 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 070M55 Carbon Steel?
070M55 Carbon Steel (BS 970 070M55 / EN9 / C55) is an unalloyed high-medium carbon engineering steel grade suitable for components requiring high surface hardness, superior wear resistance, and higher tensile strength than standard medium carbon steels. Supplied in hot rolled, cold drawn, normalized, or quenched and tempered conditions, it provides excellent dimensional stability, high wear resistance, and long-term durability.
High Tensile Strength
Delivers 650-850 MPa normalized and up to 1000+ MPa in quenched and tempered state.
Surface Hardening
Readily responds to induction or flame hardening to achieve 55-62 HRC surface case.
Good Machinability
Offers reliable machinability in annealed or normalized condition for precision turning.
Superior Wear Resistance
High carbon structure ensures high resistance to surface abrasion, galling, and impact.
Tough Core Properties
Quenched and tempered bar core maintains high fatigue resistance and load bearing capacity.
Full Traceability
Supplied with complete chemical heat analysis and EN 10204 3.1 Mill Test Certificates.
Why Choose STEEL MART for 070M55 Carbon Steel
STEEL MART is the preferred choice for purchasing 070M55 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 070M55 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 070M55 Carbon Steels, STEEL MART also supplies a wide range of carbon steel and alloy steel products for various industrial applications.
Chemical Composition of 070M55 Carbon Steel
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.50 – 0.60 % |
| Manganese (Mn) | 0.50 – 0.90 % |
| Silicon (Si) | 0.10 – 0.40 % |
| Sulphur (S) | 0.050 % Max |
| Phosphorus (P) | 0.050 % Max |
This chemical composition ensures optimal strength, hardness, and surface hardenability.
Equivalent Grades of 070M55 Carbon Steel
| Standard | Equivalent Grade |
|---|---|
| BS 970 | 070M55 / 080M55 / EN9 |
| AISI / SAE | 1055 / 1050 |
| DIN / W.Nr. | C55 / 1.0535 |
| EN | C55E / C55 |
| IS | 55C8 |
These equivalent grades ensure global compatibility across projects.
Mechanical Properties of 070M55 Carbon Steel
The mechanical properties of 070M55 Carbon Steels make them suitable for heavy-duty machinery components and wear-resistant applications. In normalized or quenched & tempered condition, this grade delivers high tensile strength, excellent wear endurance, and reliable impact resistance.
Heat Treatment & Processing of 070M55 Carbon Steel
070M55 Carbon Steels can be processed using standard heat treatment techniques.
Normalizing
Heated to 820°C–860°C and air-cooled to refine grain structure.
Annealing
Heated to 790°C–840°C for maximum machineability and ductility.
Hardening & Quenching
Heated to 810°C–850°C and quenched in oil to develop high core strength.
Induction / Flame Hardening
Surface heated to 850°C–900°C and water quenched for 55-62 HRC hard skin.
070M55 Carbon Steel Industry Applications
070M55 Carbon Steels are widely used across multiple industrial sectors.
Automotive Engineering
Used for sprockets, cams, gears, heavy shafts, and wear pins.
Heavy Machinery
Used in hydraulic cylinder rods, stressed pins, and high load shafts.
High Strength Fasteners
Used for heavy-duty studs, bolts, and key stock.
General Manufacturing
Used in industrial knives, shear blades, and wear plates.
Agricultural Equipment
Used in cultivator blades, harvester shafts, and plow pins.
Spring & Tooling Parts
Used for spring clips, hand tools, hammers, and wear components.
Availability and Customization
At STEEL MART, we supply 070M55 Carbon Steels in a wide range of sizes and specifications.
| Diameter | Diameter ranging from 10 mm to 550 mm |
| Condition | Available in As-Rolled / Normalized / Bright Drawn / Q&T condition |
| Length | Standard lengths from 3 meters to 6 meters |
| Finish | Bright drawn, black hot rolled, peeled, 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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070M55 Carbon Steel (BS 970 070M55 / EN9 / C55) is a highly reliable high-medium carbon engineering steel widely specified across automotive, machinery, agricultural, and industrial tool applications. Featuring high yield strength, outstanding surface hardenability (55-62 HRC), and excellent wear resistance, it provides high fatigue endurance for sprockets, gears, cams, heavy-duty shafts, cylinder rods, and industrial knives. Supplied by STEEL MART with strict quality assurance and full Mill Test Certification, 070M55 Carbon Steel is a dependable solution for engineering applications.
Frequently Asked Questions
Common answers regarding 070M55 Carbon Steel specifications and parameters.
It offers excellent tensile strength (650-850 MPa), superior wear resistance, high fatigue strength, and responds exceptionally well to induction surface hardening.
Yes, 070M55 (EN9) can be induction or flame hardened to achieve a high wear-resistant case hardness of 55-62 HRC while maintaining a tough core.
BS 970 070M55 / 080M55, EN9, AISI 1055 / 1050, DIN C55 (1.0535), and IS 55C8.
It is weldable with suitable pre-heating (250°C–350°C) and low hydrogen electrodes to prevent heat-affected zone cracking due to its higher carbon content.
Black hot rolled, centerless ground bright drawn, normalized, turned, and quenched & tempered (Q&T) conditions.