30CrMnSi Steel

special steel 42CrMo41.72254140SCM440EN19 Alloy Steel optimal manufacturer

According to industry experts, 42CrMo4/1.7225/4140/SCM440/EN19 Alloy Steel is highly regarded for its combination of high strength, toughness, and versatility. Its ability to be heat treated to different hardness levels makes it suitable for a wide range of applications, from automotive to aerospace. With proper heat treatment and machining, this alloy steel offers reliable performance in demanding environments.


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Table of Contents

Unveiling the Marvels of 42CrMo4/1.7225/4140/SCM440/EN19 Alloy Steel: A Comprehensive Exploration


In the vast landscape of metallurgy, certain alloys stand out as shining examples of innovation and engineering excellence. One such marvel is 42CrMo4/1.7225/4140/SCM440/EN19 Alloy Steel, renowned for its exceptional strength, toughness, and versatility. Join us as we embark on a journey to uncover the intricacies and advantages of this remarkable alloy, delving into its composition, properties, applications, suppliers, pricing, and expert insights.

Overview of 42CrMo4/1.7225/4140/SCM440/EN19 Alloy Steel

42CrMo4/1.7225/4140/SCM440/EN19 Alloy Steel is a versatile chromium-molybdenum steel known for its high tensile strength, excellent toughness, and good fatigue resistance.

Chemical Composition

Chromium (Cr)0.90-1.20%
Molybdenum (Mo)0.15-0.25%
Carbon (C)0.38-0.43%
Silicon (Si)0.15-0.35%
Manganese (Mn)0.75-1.00%
Phosphorus (P)0.035% max
Sulfur (S)0.040% max
Iron (Fe)Balance

Mechanical Properties

  • Tensile Strength: 750-1000 MPa
  • Yield Strength: 550 MPa
  • Elongation: 13% (in 50mm)


  • EN 10083-3: Technical delivery conditions for alloy steels
  • ASTM A29: Standard Specification for General Requirements for Steel Bars, Carbon and Alloy, Hot-Wrought
  • JIS G4105: Chromium Molybdenum Steels

Exploring the Features and Advantages

42CrMo4/1.7225/4140/SCM440/EN19 Alloy Steel boasts a plethora of features and advantages that make it a preferred choice in various applications.


  • High strength and toughness
  • Good fatigue resistance and impact strength
  • Excellent hardenability and heat resistance
  • Good machinability in the annealed condition
  • Can be heat treated to achieve a wide range of mechanical properties


  • Widely used in applications requiring high tensile strength and toughness, such as automotive, aerospace, and industrial components
  • Offers versatility in fabrication and heat treatment options
  • Provides good wear resistance and dimensional stability in high-stress environments
  • Cost-effective compared to some other high-alloy steels

Comparison Between 42CrMo4/1.7225/4140/SCM440/EN19 Alloy Steel and Competing Alloys

Let’s compare the advantages and disadvantages of 42CrMo4/1.7225/4140/SCM440/EN19 Alloy Steel with a competing alloy, Alloy X:

Parameter42CrMo4/1.7225/4140/SCM440/EN19 Alloy SteelAlloy X
StrengthHighVery high

Applications and Uses

From automotive components to tooling and machinery parts, 42CrMo4/1.7225/4140/SCM440/EN19 Alloy Steel finds widespread application across diverse industries.

AutomotiveAxles, crankshafts, gears, drive shafts
AerospaceLanding gear components, structural parts
MachineryTool holders, shafts, gears, couplings
Oil & GasDrill collars, drilling equipment, valves

Navigating Suppliers and Pricing

Sourcing 42CrMo4/1.7225/4140/SCM440/EN19 Alloy Steel requires careful consideration of reliable suppliers offering quality products at competitive prices.

SupplierPrice Range (per unit)Description/Notes
Specialty Steels$2.50 – $4.00 per poundSpecializes in alloy steel bars and forgings
Metals Corporation$2.80 – $4.50 per poundOffers a wide range of alloy steel products
Precision Alloys$3.00 – $5.00 per poundProvides customized alloy steel solutions

FAQs about 42CrMo4/1.7225/4140/SCM440/EN19 Alloy Steel

Q: Can 42CrMo4/1.7225/4140/SCM440/EN19 Alloy Steel be welded?
A: Yes, this alloy steel can be welded using conventional welding methods, although preheating and post-weld stress relieving may be required for certain applications.

Q: What is the heat treatment process for 42CrMo4/1.7225/4140/SCM440/EN19 Alloy Steel?
A: The heat treatment process typically involves quenching and tempering to achieve desired mechanical properties, such as hardness and toughness.

Q: What are the common applications of 42CrMo4/1.7225/4140/SCM440/EN19 Alloy Steel?
A: Common applications include automotive components, tooling, machinery parts, and industrial equipment requiring high strength and toughness.

Q: Where can I buy 42CrMo4/1.7225/4140/SCM440/EN19 Alloy Steel?
A: You can source this alloy steel from reputable suppliers such as Specialty Steels, Metals Corporation, and Precision Alloys, among others.

Q: What specifications does 42CrMo4/1.7225/4140/SCM440/EN19 Alloy Steel conform to?
A: This alloy steel conforms to standards such as EN 10083-3, ASTM A29, and JIS G4105, ensuring compliance with stringent quality requirements.

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