SAE 1045 Steel Chemical Composition

sae 1045 steel chemical composition

Understanding the chemical composition of SAE 1045 steel is essential as it directly influences its mechanical properties. The table below provides an overview of its chemical composition, which plays a key role in determining its performance and suitability for various applications.

Table of contents

  • SAE 1045 Steel Chemical Composition
  • ASTM 1045 Weldability
  • Mechanical Property of AISI 1045 Steel Cold Drawn
  • Heat Treatment of DIN 1.1191
  • 1045 Steel vs 4140 Steel
  • 1045 Quenched and Tempered Steel properties
  • AISI 1045 Equivalent Grades
  • Thermal Properties of SAE 1045
  • Tolerance of AISI 1045 Carbon Steel
  • Ck45 Steel Annealing
  • Quality Certification of Steel 1045
  • AISI 1045 Corrosion Resistance
  • Electrical Properties of JIS S45C Steel
  • Applications of SAE 1045 Steel

SAE 1045 Steel Chemical Composition

Grade C Si Mn P S
1045 0.43-0.50 0.15-0.35 0.60-0.90 ≤0.04 ≤0.05

AISI 1045 steel is known for its excellent weldability, machinability, and high strength, making it a popular choice in various industrial applications. Its good welding characteristics allow for strong and durable joints, which are crucial for structural integrity. This material is also easy to machine, offering better surface finishes and faster production times, which helps reduce manufacturing costs. Additionally, its high strength makes it ideal for use in construction and environments where heavy loads and harsh conditions are present.

AWS 1045 Weldability

sae 1045 steel weldability

Aspect Details
Welding Conditions AISI 1045 is readily welded with the correct procedure
Electrodes Use low hydrogen electrodes.
Pre-heating Pre-heat workpiece to 200°C – 300°C (392°F – 572°F).
Welding Temperature Maintain pre-heat temperature during welding.
Cooling Cool slowly using sand or ashes to control the cooling rate.
Stress Relief Perform stress relief at 550°C – 660°C (1022°F – 1220°F).

DIN 1.1191 Material Are Generally Available in Black Hot Rolled or Normalized Conditions

Normalized condition improves the structure and properties of the material by enhancing mechanical properties, reducing internal stress, improving machinability, and refining the grain structure. This makes it more suitable for precision applications and long-term durability.

Heat Treatment of DIN 1.1191

Process Heating Temperature Cooling Method
Forging 850°C – 1250°C (1562°F – 2282°F) Cool in a furnace
Annealing 800°C – 850°C (1472°F – 1562°F) Cool in a furnace
Normalizing 870°C – 920°C (1598°F – 1688°F) Cool in still air
Stress-Relieving 550°C – 660°C (1022°F – 1220°F) Cool in still air
Hardening 820°C – 850°C (1508°F – 1562°F) Quench in water or brine
Tempering 400°C – 650°C (752°F – 1202°F) Cool in still air

1045 Steel vs 4140 Steel

1045 Steel vs 4140 Steel

Property 1045 Steel 4140 Steel
Type Carbon steel Alloy steel
Carbon Content 0.43-0.50% 0.40%
Manganese Content 0.60-0.90% 0.75-1.00%
Chromium None Present
Molybdenum None Present
Iron (Fe) 98.51-98.98% 96.79-97.78%
Phosphorus (P, max) 0.04% 0.035%
Sulfur (S, max) 0.05% 0.040%
Strength Good strength and impact resistance Superior hardness and toughness
Common Uses Machinery parts, automotive components Axles, gears, shafts
Characteristics Moderate hardness and strength Enhanced wear resistance and toughness

1045 Quenched and Tempered Steel Properties

Section size mm up to 16mm 17-44 mm 41-100 mm
Tensile strength Mpa 700-850 |650-800 630-780
Yield strength Mpa 500 430 370
Impact Charpy 30 30 30
Elongation in 50mm % 14 16 7
Hardness HB 210-245 195-235 |185-230

View the Equivalent Grades of Steel 1045

The equivalent grades of SAE 1045 provide a useful reference for identifying similar materials across different international standards. Understanding these equivalents can help in selecting the right material for specific applications.

AISI 1045 Equivalent Grades

Country USA British Japan Australia
Standard ASTM A29 EN 10083-2 JIS G051 AS 1442
Grades 1045 C45/1.1191 S45C 1045

Thermal Properties of SAE 1045

Properties Metric Imperial
Thermal conductivity 51.9 W/mK 360 BTU in/hr.ft².°F
Thermal expansion co-efficient (@0.000-100°C/32-212°F) 11.2 µm/m°C 6.22 µm/m°C

Tolerance of AISI 1045 Carbon Steel

Surface Finish Black-Forged Turned Black-Rolled Peeled Grinding Polished Cold Drawn
Tolerance (0，+5mm) (0，+3mm) (0，+1mm) Best H11 Best h9 Best h11 Best H11
Annealing Temperature for JIS S45C Grade is From 790-870 °C

At this temperature range, the material softens, improving machinability and malleability. After annealing, the material is gradually cooled in a boiler to achieve the desired mechanical properties for your application needs.

Ck45 Steel Annealing

Aspect Details
Purpose of Annealing Softens surface hardness for improved machinability
Annealing Temperature 820°C to 840°C
Holding Time Sufficient time at annealing temperature
Measured Surface Hardness Typically below 200 HBW (Brinell Hardness)

Quality Certification of Steel 1045

  • Chemical analysis
  • Ultrasonic test report
  • Non Metallic Inclusion
  • Heat Treatment Process
  • Mechanical properties
  • Surface hardness
  • Grain size
  • Forging ratio
1045 Carbon Steel is Not Very Resistant to Corrosion in Harsh Environments

It is susceptible to corrosion when exposed to moisture or acidic environments. To prevent this, it often requires additional protective coatings or maintenance to ensure longevity in such conditions.

AISI 1045 Corrosion Resistance

AISI 1045 Corrosion Resistance

Feature 1045 Steel
Primary Composition 0.45% Carbon, Iron
Corrosion Resistance Low
Protective Layer Does not form a protective chromium oxide layer
Exposure to Harsh Environments Prone to rust and corrosion in salt water, acids, and bases
Maintenance Requirements Requires coating or treatment for better resistance
Typical Applications Structural components, machinery, automotive parts

Electrical Properties of JIS S45C Steel

Electrical Properties Metric English Comments
Electrical Resistivity 0.0000162 ohm-cm
Temperature 0.000 °C		 0.0000162 ohm-cm
Temperature 32.0 °F		 annealed specimen
0.0000223 ohm-cm
Temperature 100 °C		 0.0000223 ohm-cm
Temperature 212 °F		 annealed specimen

Applications of SAE 1045 Steel

Pins Gears Rams
Ratchets Bolts Light gears
Rolls Shafts Sockets
Spindles Axles Worms
Crankshafts Studs Guide rods
Torsion bars Connecting rods Hydraulic clamps

Iron Based Alloy Powder

Iron-based alloy powder is commonly used in plasma transfer arc welding (PTAW) due to its excellent mechanical properties and high resistance to corrosion and heat. This type of powder is typically composed of iron as the base metal, along with various alloying elements such as nickel, chromium, molybdenum, and tungsten.

The specific composition of the iron-based alloy powder may vary depending on the desired properties and application requirements. For example, adding nickel can increase the strength and toughness of the weld, while chromium enhances the corrosion resistance. Molybdenum and tungsten are often added to improve the high-temperature strength and creep resistance of the weld.

Iron-based alloy powders for PTAW are available in various particle sizes, typically ranging from a few micrometers to several hundred micrometers. The powder is usually fed into the plasma arc through a powder feeder, which ensures a controlled and consistent supply of powder during the welding process.

During PTAW, the powder is melted and deposited onto the workpiece, forming a weld bead. The high energy plasma arc provides the heat necessary to melt the powder and the base metal, creating a strong and durable weld joint.

Overall, iron-based alloy powder for plasma transfer arc welding offers excellent weldability, high mechanical properties, and resistance to corrosion and heat, making it suitable for a wide range of applications in industries such as aerospace, automotive, and power generation.

Fe Alloy Powder,Stainless Powder,High Temperature Powder,Iron Base Pta Welding Powder

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