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China Suppliers Factory for 1.0503, S45C, G10450, AISI 1045 Medium Carbon Steel with High Strength and Machinability
China Suppliers Factory for 1.0503, S45C, G10450, AISI 1045 Medium Carbon Steel with High Strength and Machinability

China Suppliers Factory for 1.0503, S45C, G10450, AISI 1045 Medium Carbon Steel with High Strength and Machinability

PRODUCT OVERVIEW

1045/C45 steel is classified as medium carbon steel, containing 0.4%-0.5% Carbon. This steel grade is renowned for its excellent weldability, superior machinability, and impressive strength and impact resistance. However, it has lower hardenability due to the absence of suitable alloying elements. As a leading China suppliers and factory, we provide high-quality 1045/C45 steel to meet various industrial needs. Our products ensure durability and performance, making them ideal for numerous applications.

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    Product Detail

    General Characteristics

    1045/C45 steel is defined as medium carbon steel which has 0.4%-0.5% Carbon. It offers good weldability, good machinability, high strength and impact properties, but low in hardenability because of lack of suitable alloying elements.

    Specifications & Composition

    Designation by Standards

    Mat. No. DIN EN AISI
    1.0503 C45 - 1045

    Chemical Composition (in weight %)

    C Si Mn Cr Mo Ni V W Others
    0.46 max. 0.40 0.65 max. 0.40 max. 0.10 max. 0.40 - - (Cr+Mo+Ni) = max. 0.63

    Description

    C45 is a medium carbon steel used when greater strength and hardness is desired than in the “as rolled” condition. Extreme size accuracy, straightness and concentricity combine to minimize wear in high speed applications. Turned, ground and polished.

    Applications

    Quenched and subsequently tempered steel for screws, forgings, wheel tires, shafts, sickles, axes, knives, wood working drills, hammers, etc.

    Physical Properties

    Modulus of elasticity: 205 x 103 N/mm2

    Density: 7.85 g/cm3

    Specific heat capacity: 0.48 J/g.K

    Coefficient of Linear Thermal Expansion 10-6 °C-1

    20-100 oC 20-250 oC 20-500 oC
    11.5 13.0 14.0

    Heat Treatment Specifications

    Soft Annealing

    Heat to 680-710°C, cool slowly in furnace. This will produce a maximum Brinell hardness of 207.

    Normalizing

    Normalizing temperature: 840-880°C/air.

    Hardening

    Harden from a temperature of 820-860°C followed by water or oil quenching.

    Tempering

    Tempering temperature: 550-660°C/air.

    Mechanical Properties

    Mechanical Properties in Quenched + Tempered Condition

    Diameter d (mm) Thickness t (mm) 0.2 % proof stress (N/mm²) Tensile strength (N/mm²) Elongation A5 (%) Reduction Z (%)
    <16 <8 min. 490 700-850 min. 14 min. 35
    <17-40 <8<=20 min. 430 650-800 min. 16 min. 40
    <41-100 <20<=60 min. 370 630-780 min. 17 min. 45

    Mechanical Properties in Normalized Condition

    Diameter d (mm) Thickness t (mm) 0.2% proof stress (N/mm²) Tensile strength (N/mm²) Elongation A5 (%)
    <16 <16 min. 390 min. 620 min. 14
    <17-100 <16<=100 min. 305 min. 305 min. 16
    <101-250 <100<250 min. 275 min. 560 min. 16

    Forging & Diagrams

    Forging Hot forming temperature: 1050-850°C.

    Diagram Tempering Temperature – Mechanical Properties

    Frequently Asked Questions (FAQ)

    Q1: What is the carbon content of 1045/C45 steel?
    C45/1045 is classified as a medium carbon steel, containing approximately 0.4% to 0.5% carbon by weight.
    Q2: What are the main applications of C45 steel?
    It is widely used in quenched and tempered conditions for components requiring high strength, such as screws, forgings, wheel tires, shafts, sickles, axes, knives, wood working drills, and hammers.
    Q3: How is C45 steel heat treated for soft annealing?
    For soft annealing, C45 steel is heated to 680-710°C and then cooled slowly inside the furnace, which yields a maximum Brinell hardness of 207.
    Q4: What is the density and modulus of elasticity of C45 steel?
    At ambient temperatures, C45 steel has a density of 7.85 g/cm³ and a modulus of elasticity of 205 x 10³ N/mm².
    Q5: What are the recommended temperatures for hardening and tempering C45 steel?
    Hardening is performed at 820-860°C followed by water or oil quenching. Tempering is conducted at 550-660°C followed by air cooling.
    Q6: Does C45 steel have good weldability and machinability?
    Yes, C45 steel offers good weldability and machinability alongside high strength and impact properties, though its hardenability is relatively low due to the absence of key alloying elements.