AISI 1018 Carbon Steel
We are AISI 1018 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 AISI 1018 Carbon Steels (UNS G10180 / SAE 1018) that meet national and international quality standards for automotive, general engineering, machine tool, and fastener applications. AISI 1018 Carbon Steel is one of the most widely used cold-drawn low carbon mild steels, known for its optimal combination of strength, ductility, superior weldability, and excellent machinability (78%). This grade offers great case-hardening performance, producing a hard wear-resistant outer layer while maintaining a tough impact-resistant core. AISI 1018 is typically supplied in cold drawn, turned & polished, or hot rolled condition, ensuring high dimensional precision and a smooth bright finish. This carbon steel grade is widely used for manufacturing shafts, pins, studs, bolts, gears, ratchets, spindles, and spacers.
Our AISI 1018 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 ASTM A108 / SAE standards. STEEL MART follows strict quality control procedures and ensures timely delivery.
What is AISI 1018 Carbon Steel?
AISI 1018 Carbon Steel (UNS G10180 / SAE 1018) is a low carbon mild steel grade celebrated for its uniform balance of mechanical strength, high ductility, excellent weldability, and high machinability. Supplied in cold drawn, turned & polished, or hot rolled condition, it provides close dimensional tolerances and a bright finish for precision engineering shafts, pins, bolts, and spacers.
High Machinability
Cuts, turns, and drills smoothly for high-speed automated machining.
Superior Weldability
Can be welded with all standard methods without pre-heating.
Bright Cold Finish
Cold drawn bars offer tight dimensional tolerance and bright surface.
Case Hardening Capacity
Carburizes to form a hard wear layer (55–60 HRC) over a shock-resistant core.
Good Ductility
Maintains formability and toughness under dynamic mechanical loads.
Certified Compliance
Supplied with full MTC and strict quality compliance.
Why Choose STEEL MART for AISI 1018 Carbon Steel
STEEL MART is the preferred choice for purchasing AISI 1018 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 AISI 1018 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 AISI 1018 Carbon Steels, STEEL MART also supplies a wide range of carbon steel and alloy steel products for various industrial applications.
Chemical Composition of AISI 1018 Carbon Steel
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.15 – 0.20 % |
| Manganese (Mn) | 0.60 – 0.90 % |
| Silicon (Si) | 0.15 – 0.35 % |
| Sulphur (S) | 0.050 % Max |
| Phosphorus (P) | 0.040 % Max |
This chemical composition ensures optimal machinability, weldability, and case hardening.
Equivalent Grades of AISI 1018 Carbon Steel
| Standard | Equivalent Grade |
|---|---|
| AISI / SAE | 1018 / UNS G10180 |
| BS 970 | 070M20 / EN 3B / 080M15 |
| DIN / W.Nr. | C15 / C18 (1.0401) |
| EN | C18E / 1.1149 |
| JIS | S18C / S20C |
These equivalent grades ensure global compatibility across engineering standards.
Mechanical Properties of AISI 1018 Carbon Steel
The mechanical properties of AISI 1018 Carbon Steels make them suitable for precision machinery components, shafts, and pins. In cold drawn condition, it offers a tensile strength of 440–550 MPa and yield strength of 370–450 MPa.
Heat Treatment & Processing of AISI 1018 Carbon Steel
AISI 1018 Carbon Steels undergo standard thermal processing to enhance machinability or case hardness.
Carburizing
Heated to 880°C–920°C for deep carbon case layer formation.
Annealing
Heated to 870°C–910°C and furnace cooled for stress relief.
Normalizing
Heated to 890°C–920°C and air-cooled to refine grain structure.
Case Quenching
Quenched from 760°C–780°C to achieve a 55–60 HRC wear surface.
AISI 1018 Carbon Steel Industry Applications
AISI 1018 Carbon Steels are widely used across machine tool, automotive, and shafting sectors.
Machined Shafting & Axles
Used for cold drawn drive shafts, axles, and spindles.
Automotive Linkages & Pins
Used for king pins, shackles, levers, and engine pins.
Studs & Threaded Rods
Used for precision bolts, studs, fasteners, and tie rods.
Carburized Gears & Ratchets
Used for light gears, ratchets, pinions, and chain pins.
Agricultural Equipment
Used in farm machinery pins, bushings, and spacers.
Machine Tool Components
Used in mounting plates, fixtures, brackets, and guide bars.
Availability and Customization
At STEEL MART, we supply AISI 1018 Carbon Steels in a wide range of sizes and specifications.
| Diameter / Thickness | Diameter ranging from 6 mm to 350 mm / Hex & Flat bars available |
| Condition | Available in Cold Drawn / Turned & Polished / As-Rolled condition |
| Length | Standard lengths from 3 meters to 6 meters |
| Finish | Bright cold drawn, turned & ground, and black hot rolled finish available |
| Customization | Custom cut sizes available 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.
Enquire For Rates ✉
Submit your specific requirements to get instant price quotes directly from Steel Mart Mumbai.
GET INSTANT PRICE QUOTEConclusion
AISI 1018 Carbon Steel (UNS G10180 / SAE 1018) is a premier low-carbon mild engineering steel widely used across automotive, machine tool, fastener, and shafting manufacturing. With its excellent machinability (78%), superior weldability, cold drawability, and case-hardening capacity, it provides long-term reliability for cold drawn shafts, pins, studs, carburized gears, and spacers. Supplied by STEEL MART with strict quality control and Mill Test Certification, AISI 1018 Carbon Steel is a versatile and dependable solution for engineering applications.
Frequently Asked Questions
Common answers regarding AISI 1018 Carbon Steel specifications and parameters.
Its cold drawn condition provides high dimensional accuracy, bright surface finish, excellent machinability (78%), and balanced strength.
Yes, it carburizes well to achieve a hard wear surface (55 to 60 HRC) over a shock-resistant ductile core.
SAE 1018 / UNS G10180, BS 970 070M20 (EN 3B), DIN C15 (1.0401), and JIS S18C.
Cold drawn shafts, pins, studs, bolts, carburized gears, ratchets, spindles, and mounting fixtures.
Round bars, Flat bars, Hex bars, Cold drawn bars, turned & polished bars, and custom cut sizes.