Special Steel C4510451.1191S45C

Table of Contents

Steel is a fundamental material in the manufacturing industry, and among the numerous types available, special steels stand out for their unique properties and applications. Today, we’re focusing on a specific type known as Special Steel C4510451.1191S45C. This article will cover everything you need to know about this steel variant, from its composition and properties to its applications, specifications, and more.

Overview of Special Steel C4510451.1191S45C

Special Steel C4510451.1191S45C, often simply referred to as S45C, is a medium carbon steel known for its exceptional balance of strength, hardness, and toughness. It is widely used in various industries, including automotive, construction, and machinery manufacturing, due to its versatile mechanical properties and ease of processing.

Key Features of S45C:

  • High Strength: Offers superior tensile and yield strength.
  • Good Toughness: Maintains toughness under different conditions.
  • Machinability: Easily machinable and weldable.
  • Heat Treatability: Can be heat treated to improve hardness and mechanical properties.
Special Steel C4510451.1191S45C

Chemical Composition of Special Steel C4510451.1191S45C

Understanding the chemical makeup of S45C is crucial for grasping its properties and applications. The table below outlines the typical composition of this special steel.

ElementComposition (%)
Carbon (C)0.42-0.48
Silicon (Si)0.15-0.35
Manganese (Mn)0.60-0.90
Phosphorus (P)≤ 0.030
Sulfur (S)≤ 0.035
Iron (Fe)Balance

This specific composition gives S45C its unique balance of hardness, strength, and toughness.

Mechanical Properties of Special Steel C4510451.1191S45C

The mechanical properties of S45C are what make it highly desirable in various applications. Here are the key mechanical properties:

Tensile Strength570-700 MPa
Yield Strength305-355 MPa
Hardness (Brinell)170-210 HB
Impact Value (Charpy V)34 J (at room temperature)

Applications of Special Steel C4510451.1191S45C

S45C’s versatility is evident in its widespread use across different industries. The table below highlights some common applications.

Automotive ComponentsUsed in manufacturing gears, shafts, and crankshafts.
Construction MachineryIdeal for making structural components and frames.
Industrial MachineryCommonly used in parts such as cams, axles, and spindles.
Tools and DiesSuitable for making molds and dies due to its hardness.
Agricultural EquipmentUsed in parts like plowshares and cultivator tines.

Specifications, Sizes, and Grades of Special Steel C4510451.1191S45C

S45C steel is available in various specifications and sizes to meet different requirements. Here’s a detailed look:

StandardsJIS G4051, ASTM A29/A29M
FormsBars, Sheets, Plates, Forgings
SizesThickness: 2mm to 500mm, Width: 10mm to 2000mm
GradesS45C, C45, 1045, 1191

Suppliers and Pricing of Special Steel C4510451.1191S45C

Finding reliable suppliers and understanding the pricing is essential for procurement. Here’s a list of some notable suppliers and their pricing details:

SupplierCountryPrice (USD per ton)Notes
ABC Steel CorporationUSA600-750Bulk discounts available
Global Steel Ltd.Germany620-780Custom sizes upon request
Asia MetalworksChina550-700Fast delivery options
Quality Steels Pvt. Ltd.India580-730Competitive pricing for large orders

Advantages and Limitations of Special Steel C4510451.1191S45C

Every material has its strengths and weaknesses. Let’s compare the pros and cons of S45C:

StrengthHigh tensile and yield strengthNot as strong as high-carbon steels
ToughnessGood impact resistanceLess tough compared to alloy steels
MachinabilityEasily machinableRequires careful handling to avoid cracking
Heat TreatabilityCan be hardened and temperedHeat treatment needs to be precise
CostAffordable compared to many alloy steelsMore expensive than low-carbon steels

Processing and Heat Treatment of Special Steel C4510451.1191S45C

Processing and heat treatment significantly affect the properties of S45C. Here’s an overview:

  • Annealing: Heat to 820-850°C, hold until temperature is uniform throughout the section, and cool in the furnace.
  • Normalizing: Heat to 870-900°C, hold until temperature is uniform throughout the section, and cool in still air.
  • Hardening: Heat to 820-860°C, hold until temperature is uniform throughout the section, and quench in oil or water.
  • Tempering: Heat to 550-660°C, hold until temperature is uniform throughout the section, and cool in still air.

Comparison with Other Steels

How does S45C stack up against other steels? Let’s compare it to a couple of other popular steel types:

FeatureS45C1045 Steel4140 Steel
Carbon Content0.42-0.48%0.43-0.50%0.38-0.43%
StrengthHigh tensile and yield strengthSimilar to S45CHigher tensile and yield strength
Heat TreatabilityExcellentExcellentExcellent
CostAffordableSlightly cheaper than S45CMore expensive due to alloying
Special Steel C4510451.1191S45C


Here are some frequently asked questions about S45C:

What is S45C steel?S45C is a medium carbon steel known for its strength, toughness, and heat treatability.
What are the common applications of S45C?Common applications include automotive parts, machinery components, and industrial tools.
How does S45C compare to 1045 steel?Both are similar in composition and properties, but S45C may offer slightly higher strength.
Is S45C steel weldable?Yes, it is weldable, but preheating and post-weld heat treatment are recommended.
Can S45C be heat treated?Yes, it can be hardened and tempered to improve its mechanical properties.


Special Steel C4510451.1191S45C, or S45C, is a versatile and reliable medium carbon steel widely used across various industries. Its unique balance of strength, toughness, and machinability makes it a popular choice for many applications, from automotive components to industrial machinery. Understanding its properties, applications, and processing methods can help you make informed decisions for your projects.

Whether you’re a manufacturer looking for a robust material or an engineer seeking specific mechanical properties, S45C steel offers a compelling blend of performance and affordability. Dive into the world of special steels and discover how S45C can meet your needs, providing both reliability and efficiency in your manufacturing processes.

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