Free-Cutting Steels / LEADFREE
Lead-Free Free-Cutting Steels
Lead-free free-cutting steels are grades developed for environmentally friendly production requirements. They replace leaded alternatives in RoHS-compliant applications.
Technical Specifications
Grades
11SMn30 (1.0715), 11SMn37 (1.0736), 44SMn28 (1.0762)
Tolerance
h9, h10, h11
Size Range
Round 2-120mm, Hexagon 5-80mm, Square 5-70mm
Standards
EN ISO 683-4, EN 10277
Key Features
- Good machinability (lead-free formulation)
- RoHS and REACH compliant
- Clean chip formation
- Acceptable tool life
- Good surface finish quality
- Suitable for high-volume production
- Available in round, hexagon, and square profiles
- Environmentally friendly production processes
Applications
- RoHS-compliant electronic component parts
- Automotive industry fasteners
- CNC machined general machine parts
- Bolt, nut, and screw production
- Pin and bushing manufacturing
- Hydraulic and pneumatic fittings
- Food machinery parts
- Medical device components
Dimension Table
| Form | Size Range (mm) | Tolerance | Standard Length |
|---|---|---|---|
| Round | 2 - 120 mm | h9, h10, h11 | 3 m (min 2.5 m, max 6 m) |
| Hexagon | 5 - 80 mm | h9, h10, h11 | 3 m (min 2.5 m, max 6 m) |
| Square | 5 - 70 mm | h9, h10, h11 | 3 m (min 2.5 m, max 6 m) |
Technical Notes
- 0111SMn30 (1.0715) is the most commonly used lead-free free-cutting steel grade.
- 02Manganese sulfide (MnS) inclusions serve the chip-breaking function.
- 03Slightly lower cutting speeds should be applied compared to leaded grades.
- 04EN ISO 683-4 defines hot-rolled production requirements.
- 05EN 10277 specifies cold-drawn mechanical properties.
- 0644SMn28 (1.0762) is suitable for applications requiring higher strength.
- 07Lead-free grades are mandatory in food and medical industry sectors.