Products

28SMnPb28

Automotive

Fasteners

Special Free-Cutting Steel for Applications Requiring ~600 MPa Strength

This steel is not unified in the standards. It is used when you want to obtain a mechanical resistance of circa 600 MPa, not achievable with other low-carbon free-cutting steels, while maintaining good machinability. Not suitable for heat treatments.

References and Comparable Standards

References and comparable standards for References steel
Region	Standard	Grade	Werkstoff No.
Europe	EN 10087: 1998 EN 10277-3: 2008	-	-
Italy	UNI 4838-80	-	-
Germany	DIN 1651-88	-	-
France	NF A 35-561-92	-	-
UK	BS 970 pt.3-91	-	-
USA	ASTM A 29	-	-

Europe

StandardEN 10087: 1998
EN 10277-3: 2008

Grade-

Werkstoff No.-

Italy

StandardUNI 4838-80

Grade-

Werkstoff No.-

Germany

StandardDIN 1651-88

Grade-

Werkstoff No.-

France

StandardNF A 35-561-92

Grade-

Werkstoff No.-

StandardBS 970 pt.3-91

Grade-

Werkstoff No.-

USA

StandardASTM A 29

Grade-

Werkstoff No.-

Chemical Composition (Cast Analysis) (%)

Chemical composition values for References steel
C	Si / max	Mn	P / max	S	Pb
0,25-0,30	0,30	1,10-1,60	0,10	0,24-0,32	0,15-0,30

Chemical composition values for References steel
Element	Value (%)
Carbon	0,25-0,30
Silicon	0,30
Manganese	1,10-1,60
Phosphorus	0,10
Sulfur	0,24-0,32
Lead	0,15-0,30

Mechanical Properties – Bright Steel

Mechanical properties for References steel
Size (mm)	as Rolled and/or as Rolled + Turned (+SH)		Cold Drawn (+C)
Size (mm)	Hardness HB	Tensile Strength Rm (MPa)	Yield Strength Rp0,2 (MPa) min	Tensile Strength Rm (MPa)	Elongation A5 (%) min
5≤d≤10	PropertyProduction MethodValue					as Rolled and/or as Rolled + Turned (+SH)-	as Rolled and/or as Rolled + Turned (+SH)-	Cold Drawn (+C)440	Cold Drawn (+C)630-890	Cold Drawn (+C)7
10<d≤16	PropertyProduction MethodValue					as Rolled and/or as Rolled + Turned (+SH)-	as Rolled and/or as Rolled + Turned (+SH)-	Cold Drawn (+C)400	Cold Drawn (+C)590-850	Cold Drawn (+C)7
16<d≤40	PropertyProduction MethodValue					as Rolled and/or as Rolled + Turned (+SH)140-200	as Rolled and/or as Rolled + Turned (+SH)450-650	Cold Drawn (+C)350	Cold Drawn (+C)540-820	Cold Drawn (+C)8
40<d≤63	PropertyProduction MethodValue					as Rolled and/or as Rolled + Turned (+SH)140-200	as Rolled and/or as Rolled + Turned (+SH)450-650	Cold Drawn (+C)330	Cold Drawn (+C)520-800	Cold Drawn (+C)9
63<d≤100	PropertyProduction MethodValue					as Rolled and/or as Rolled + Turned (+SH)150-200	as Rolled and/or as Rolled + Turned (+SH)420-620	Cold Drawn (+C)-	Cold Drawn (+C)-	Cold Drawn (+C)-
Note: For size <5 mm the mechanical properties may be agreed at the time of enquiry and order.