AISI 1045 Carbon Steel
We are AISI 1045 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 1045 Carbon Steels (UNS G10450 / SAE 1045) that meet national and international quality standards for automotive, heavy machinery, hydraulic, and gear manufacturing applications. AISI 1045 Carbon Steel is a medium carbon engineering steel known for its high tensile strength (570-700 MPa normalized / 700-850+ MPa Q&T), high yield strength, excellent wear resistance, and outstanding induction/flame surface hardenability (55-60 HRC). With carbon content balanced between 0.42% and 0.50%, AISI 1045 offers superior strength and hardness compared to lower carbon grades, making it one of the most widely specified steels for stressed engineering parts. AISI 1045 is typically supplied in hot rolled, cold drawn, normalized, or quenched and tempered (Q&T) condition, ensuring consistent mechanical strength and fatigue resistance. This carbon steel grade is widely used for manufacturing axles, drive shafts, crankshafts, connecting rods, gears, hydraulic cylinder rods, studs, and wear plates.
Our AISI 1045 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 1045 Carbon Steel?
AISI 1045 Carbon Steel (UNS G10450 / SAE 1045) is one of the most widely used medium carbon engineering steel grades worldwide. Designed for components requiring high tensile strength, excellent wear resistance, and deep surface induction hardenability (55–60 HRC). Supplied in hot rolled, cold drawn, normalized, or quenched and tempered (Q&T) conditions, it provides exceptional reliability for drive axles, crankshafts, gears, hydraulic rods, and heavy machinery parts.
High Tensile Strength
Delivers up to 850+ MPa tensile strength in quenched and tempered condition.
Good Machinability
Readily turned, milled, and drilled into heavy axles and gears.
High Wear Resistance
Medium carbon structure prevents premature wear under heavy friction.
Induction Hardening (55–60 HRC)
Surface hardens up to 55–60 HRC for high friction components.
Fatigue Endurance
Withstands high torsional shock and cyclic load in transmission parts.
Certified Quality
Supplied with full MTC and strict quality compliance.
Why Choose STEEL MART for AISI 1045 Carbon Steel
STEEL MART is the preferred choice for purchasing AISI 1045 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 1045 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 1045 Carbon Steels, STEEL MART also supplies a wide range of carbon steel and alloy steel products for various industrial applications.
Chemical Composition of AISI 1045 Carbon Steel
| Element | Composition (%) |
|---|---|
| Carbon (C) | 0.42 – 0.50 % |
| 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 provides superior strength, high surface hardenability, and wear durability.
Equivalent Grades of AISI 1045 Carbon Steel
| Standard | Equivalent Grade |
|---|---|
| AISI / SAE | 1045 / UNS G10450 |
| BS 970 | 080M40 / EN 8 / EN 8D |
| DIN / W.Nr. | C45 / 1.0503 |
| EN | C45E / 1.1191 |
| JIS | S45C |
These equivalent grades ensure global compatibility across engineering standards.
Mechanical Properties of AISI 1045 Carbon Steel
The mechanical properties of AISI 1045 Carbon Steels make them ideal for heavy machinery, shafts, axles, and gears. In quenched & tempered condition, this grade offers elevated tensile strength, high yield strength, and exceptional wear resistance.
Heat Treatment & Processing of AISI 1045 Carbon Steel
AISI 1045 Carbon Steels respond exceptionally well to oil/water quenching, tempering, and surface induction hardening.
Normalizing
Heated to 850°C–890°C and air-cooled to refine grain structure.
Oil / Water Quenching
Heated to 820°C–860°C and quenched for deep through-hardening.
Tempering
Reheated to 540°C–660°C to achieve optimum toughness and ductility.
Induction Hardening
Localized surface hardening to 55–60 HRC for high wear components.
AISI 1045 Carbon Steel Industry Applications
AISI 1045 Carbon Steels are widely used across automotive, machinery, hydraulic, and gear manufacturing sectors.
Drive Axles & Spindles
Used for heavy drive axles, spindles, and steering knuckles.
Crankshafts & Connecting Rods
Used for automotive crankshafts, connecting rods, and levers.
Hydraulic Rods & Rams
Used for hard-chrome plated hydraulic cylinder rods and rams.
Heavy Gears & Pinions
Used for induction-hardened gears, pinions, and sprockets.
Earthmoving & Agriculture
Used in excavator pins, buckets, tines, and wear plates.
Heavy Machinery Parts
Used in press shafts, machine tool spindles, and rotors.
Availability and Customization
At STEEL MART, we supply AISI 1045 Carbon Steels in a wide range of sizes and specifications.
| Diameter / Thickness | Diameter ranging from 10 mm to 450 mm / Plates & Sheets available |
| Condition | Available in Hot Rolled / Cold Drawn / Normalized / Q&T condition |
| Length | Standard lengths from 3 meters to 6 meters |
| Finish | Bright cold drawn, hard-chrome plated, and black hot rolled finish available |
| Customization | Custom cut sizes and forged blocks available per project requirements |
| Services | Machining, cutting, turning, chrome-plating, and grinding services available |
| Certification | Supplied with Mill Test Certificates and inspection reports |
Our strict quality control ensures consistent quality.
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AISI 1045 Carbon Steel (UNS G10450 / SAE 1045) is a world-standard medium carbon engineering steel widely specified across automotive, machinery, hydraulic, and gear manufacturing industries. With its high tensile strength (up to 850+ MPa Q&T), superior wear resistance, excellent heat treatment response, and surface induction hardenability (55–60 HRC), it provides long-term reliability for drive axles, crankshafts, hydraulic rods, heavy gears, and machinery wear components. Supplied by STEEL MART with strict quality control and Mill Test Certification, AISI 1045 Carbon Steel is a versatile and dependable solution for engineering applications.
Frequently Asked Questions
Common answers regarding AISI 1045 Carbon Steel specifications and parameters.
Induction or flame surface hardening on AISI 1045 typically yields a surface hardness between 55 and 60 HRC.
Yes, it responds exceptionally well to normalizing, oil/water quenching, and tempering (Q&T) to achieve up to 850+ MPa tensile strength.
SAE 1045 / UNS G10450, BS 970 080M40 (EN 8 / EN 8D), DIN C45 (1.0503), and JIS S45C.
Drive axles, crankshafts, connecting rods, induction-hardened gears, hydraulic cylinder rods, heavy studs, and wear plates.
Round bars, Flat bars, Hex bars, Chrome-plated rods, Plates, and custom cut sizes.