CK-45 carbon steel

Introduction

we manufacture forging ingots, billets, and blooms in carbon steel specifically for CK-45, designed for medium-high strength engineering applications. CK-45 is a medium carbon, non-alloy steel known for its higher strength and good toughness. It is suitable for components that require enhanced Mechanical properties and excellent response to heat treatment.

with controlled carbon, manganese, and silicon content, CK-45 offers reliable performance in general engineering, automotive, and machined part applications at a cost-effective level.

Chemical composition

Element	Content (%)	Function / effect
Carbon (c)	0.42 – 0.50	Provides higher strength and hardness
Manganese (mn)	0.50 – 0.80	Improves hardenability and toughness
Sulphur (s)	Max 0.030	Impurity; controlled for machinability
Phosphorus (p)	Max 0.035	Impurity; controlled to maintain toughness
Silicon (si)	0.15 – 0.35	Enhances strength and elasticity
Chromium (cr)	Nil	Not present
Nickel (ni)	Nil	Not present
Molybdenum (mo)	Nil	Not present

Mechanical properties (typical – heat treated)

• Tensile strength: 600 – 800 MPa
• Yield strength: 350 – 550 MPa
• Hardness: 180 – 230 HB
• Toughness: Good

(Properties may vary depending on section size and heat treatment)

Heat treatment

• Annealing: improves machinability and softens the steel
• Normalizing: refines grain structure and improves strength
• Quenching & tempering: used when higher strength and hardness are required heat treatment parameters can be adjusted based on end-use requirements.

Key features and benefits

• Higher strength than standard medium carbon steels
• Good toughness and wear resistance
• Good machinability after annealing
• Consistent performance after heat treatment
• Cost-effective for medium-high strength applications
• Suitable for forging, machining, and hardening

Typical applications

• Shafts and axles
• Gears, bolts, and fasteners
• Pins, rods, and bushes
• Automotive components
• Forged and machined parts requiring higher strength

Equivalent steel grades

• En47 (approximate equivalent)
• C45 (din / en standard)
• Aisi 1045 (american standard)

Why choose CK-45 for your application?

CK-45 offers a strong combination of higher mechanical strength, good toughness, and cost effectiveness. It is ideal for applications where moderate to high strength and wear resistance are critical without the need for alloying elements.

Comparison table for similar grades

Grade	Carbon (%)	Key applications	Heat treatment	Comments
CK-45	0.42 – 0.50	Shafts, gears, fasteners	Normalizing / q&t	Higher strength and toughness
C45	0.42 – 0.50	General engineering	Normalizing / q&t	Din / en equivalent
En47	0.45 – 0.50	Engineering parts	Normalizing / q&t	Slightly higher carbon
Aisi 1045	0.43 – 0.50	Machined components	Normalizing / q&t	American equivalent

Summary

CK-45 is a medium carbon steel with enhanced strength and toughness, suitable for a wide range of general engineering and automotive applications. With good mechanical properties, flexible heat treatment options, and economical pricing, it remains a practical and reliable choice for industrial use.