SAE1078M High Carbon Steel Plate

Element

Composition Range (%)

Carbon (C)

0.75 - 0.88

Manganese (Mn)

0.60 - 0.90

Phosphorus (P) (max)

0.035

Sulfur (S) (max)

0.040

Silicon (Si) (optional)

0.15 - 0.35 (if specified)

Iron (Fe)

Balance

Advantage Category

Specific Advantages

High Strength and Hardness

- 0.70–0.80% carbon content, significantly higher strength and hardness than low/medium carbon steels
- Can be further hardened via quenching and tempering

Excellent Wear Resistance

- Carbides formed during heat treatment enhance resistance to abrasive wear
- Suitable for wear-prone applications like agricultural machinery and industrial tools

High Tensile and Fatigue Strength

- Tensile strength of 600–900 MPa (heat treatment dependent)
- Resistant to cyclic loading, ideal for springs and dynamic stress scenarios

Cost-Effective

- Lower cost than alloy structural steels, high cost-performance ratio
- Widely available with short lead times

Workability

- Machinable with proper tooling and parameters
- Good hot formability; cold forming requires attention to avoid cracking

Heat Treatment Flexibility

- Supports annealing, normalizing, quenching and tempering
- Precise control over hardness-toughness balance

Moderate Corrosion Resistance

- Better corrosion resistance than low carbon steels
- Surface treatments (e.g., plating) can further improve corrosion resistance

Industry/Sector

Specific Applications

Automotive

- Suspension springs, valve springs
- Transmission gears
- Brake discs/pads

Industrial Machinery

- Saw blades, shear tools
- Agricultural plow blades, harvester components
- Conveyor wear plates, rollers

Manufacturing & Tooling

- Stamping dies, punches
- Casting molds
- Precision jigs and fixtures

Construction & Mining

- Excavator wear liners
- Crusher components
- Heavy machinery connectors

Consumer & Tools

- Hammers, chisels, axes
- Fitness equipment structural parts
- Outdoor tools (e.g., shovel blades)

American Standard

International Standard (Approximate)

Chinese Standard

Japanese Standard

SAE 1078M

EN 10083-3: C80E (European standard)
ISO 683-17: HC80 (International standard)

GB/T 1298: T8/T8A

JIS G4401: SK5