SAE 1008 carbon steel

Introduction

We manufacture forging ingots, billets, and blooms in carbon steel specifically for SAE 1008, designed for very low carbon applications where excellent formability, high ductility, and easy weldability are required.

SAE 1008 is a very low carbon, unalloyed steel with approximately 0.08% carbon content. It offers superior ductility and high machinability, making it ideal for deep drawing, forming, and fabrication in automotive, packaging, and general engineering applications with low mechanical loads.

Chemical composition

Element	Content (%)	Function / effect
Carbon (c)	0.06 – 0.10	Provides very low strength with excellent ductility and formability
Manganese (mn)	0.30 – 0.60	Improves toughness and machinability
Phosphorus (p)	0.040 max	Controlled to prevent brittleness
Sulphur (s)	0.050 max	Improves machinability when controlled
Silicon (si)	0.10 – 0.30	Acts as deoxidizer and improves strength
Chromium (cr)	Nil	Not intentionally added
Nickel (ni)	Nil	Not present
Molybdenum (mo)	Nil	Not present
Other elements	—	No significant alloying additions

Mechanical properties (typical – annealed / normalized condition)

• Tensile strength: 350 – 440 MPa
• Yield strength: 180 – 270 MPa
• Elongation: 30 – 40 %
• Hardness: 100 – 130 HB

Heat treatment

• Annealing: improves softness and formability
• Normalizing: refines grain structure and improves mechanical properties
• Limited quenching & tempering due to very low carbon content

Key features and benefits

• Excellent ductility and formability
• Very good weldability and machinability
• Cost-effective for low-strength and high-formability applications
• Ideal for deep drawing, bending, and shaping
• Widely available and versatile

Typical applications

• Automotive body panels
• Packaging materials
• Drawn and formed parts
• Light fabrication components
• General engineering structures

Why choose 42CrM04 for your application?

42CrM04 is a medium carbon chromium-molybdenum alloy steel that offers significantly higher strength, toughness, and fatigue resistance compared to very low carbon steels like SAE 1008.

Its alloying elements provide excellent hardenability, wear resistance, and high-temperature performance, making 42CrM04 ideal for components subjected to high mechanical loads, cyclic stress, and wear.

While SAE 1008 is suitable for applications requiring high formability and low loads, 42CrM04 provides durability and performance for critical engineering parts.

Comparison Table For Similar Grades

Grade	Carbon (%)	Key Applications	Heat Treatment	Comments
SAE 1008	≤ 0.10	Sheets, Panels	Annealed	Excellent formability
ASTM A1008	≤ 0.10	Sheet metal	Annealed	Commercial sheet grade
EN DC01	~ 0.08	Deep drawing	Annealed	European equivalent

Summary

SAE 1008 carbon steel is a very low carbon steel with excellent formability, ductility, and machinability, ideal for light fabrication and general engineering applications with low mechanical demands. For higher performance needs, grades like 42CrM04 are recommended.