En19c alloy steel

Introduction

We manufacture forging ingots, billets, and blooms in alloy steel specifically for En19c, tailored for high-performance applications.  

En19c is a medium carbon, low alloy chromium-molybdenum steel with a slightly higher carbon content compared to En19, providing increased hardness and strength. It is designed for high-stress and high-wear applications where durability and toughness are essential. The alloy elements chromium and molybdenum improve hardenability, wear resistance, and toughness, making En19c suitable for components in automotive, heavy machinery, and engineering applications.

Chemical composition

Element Content (%) Function / effect
Carbon (c) 0.40 – 0.45 Provides increased hardness and strength
Manganese (mn) 0.50 – 0.80 Improves hardenability and toughness
Sulfur (s) Max 0.050 Impurity; low content improves machinability
Phosphorus (p) Max 0.050 Impurity; low content improves toughness
Silicon (si) 0.10 – 0.35 Increases strength and elasticity
Chromium (cr) 0.90 – 1.20 Increases hardness, wear resistance, and corrosion resistance
Nickel (ni) Nil Not present or in trace amounts
Molybdenum (mo) 0.20 – 0.35 Improves hardness, toughness, and high temperature strength

Mechanical properties (typical values that may vary based on heat treatment)

  • Tensile strength:  approx. 900 – 1150 MPa
  • Yield strength:  approx. 650 – 900 MPa
  • Hardness:  30 – 40 hrc (customizable by heat treatment )
  • Impact toughness:  high
  • Fatigue resistance:  excellent

Heat treatment

  • Annealing:  softens the steel for better machinability before final processing
  • Quenching:  heating to approx. 830 – 870°c followed by rapid cooling to form martensite
  • Tempering:  reheating to moderate temperatures to relieve stresses and balance hardness with toughness

Heat treatment  can be adjusted to meet specific performance requirements.

Key features and benefits

  • Uniform through hardening for consistent Mechanical properties
  • Higher hardness and strength due to slightly higher carbon content
  • Excellent toughness and wear resistance
  • Good machinability in annealed condition
  • Dimensional stability after heat treatment
  • Suitable for forging, machining, and heavy-duty component manufacturing

Typical applications

  • High-stress shafts, gears, and axles in automotive and industrial machinery
  • Transmission components and engine parts
  • Heavy-duty forged components
  • Other parts subjected to high wear and mechanical loads

Equivalent steel grades

  • En19c (bs en 10083-1):  european standard alloy steel
  • AISI  4140:  common american equivalent with similar chemistry
  • 42CrM04:  close european grade

Why choose En19c for your application?

En19c offers a slightly higher carbon content than En19, providing improved hardness and strength while maintaining excellent toughness and wear resistance. This makes it ideal for highly demanding applications where performance and durability are crucial.

Comparison table for similar grades

Grade Carbon (%) Key applications Heat treatment Comments
En19c 0.40-0.45 Shafts, gears, automotive parts Quenching & tempering Higher hardness than En19
Aisi 4140 0.38-0.43 Automotive, gears, shafts Quenching & tempering Common american equivalent
42CrM04 0.38-0.45 General engineering, shafts Quenching & tempering European equivalent

Summary

En19c is a medium carbon chromium-molybdenum alloy steel optimized for high-strength and wear-resistant applications in automotive and heavy machinery industries. It balances hardness, toughness, and machinability for cost-effective manufacturing of critical components.