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44SMnPb28 - Nr.1.0763

Steel with the addition of sulfur and lead; the special carbon content allows excellent hardness to be obtained after tempering.

References and Comparable Standards

Standard Reference: EN ISO 683-4: 2018 (Hot-rolled products) | EN 10277: 2018 (Bright products)
EUROPE ITALY GERMANY FRANCE UK USA
EN 10087: 1998
EN 10277-3: 2008		 (UNI 4838-80)

(DIN 1651-88)

(NF A 35-561-92)

 (BS 970 pt.3-91) ASTM A 29
Grade N°   Werkstoff N°      
44SMnPb28 1.0763 CF44SMnPb28 - - 45MF6.3+Pb 226M44 Leaded 11L44

Chemical Composition (Cast Analysis) (%)

C Si / max Mn P / max S Pb
0,40÷0,48 0,40 1,30÷1,70 0,060 0,24÷0,33 0,15÷0,35

Mechanical Properties - As Rolled Condition

Size
(mm)		 as Rolled and/or as Rolled + Turned (+SH) as Rolled and/or as Rolled + Turned + Quenched + Tempered (+SH +QT)
Hardness HB max Rm (MPa) Rp0,2 (MPa) min Rm (MPa) A5 (%) min
5≤d≤10 (266)* 630÷900* 520 700÷850* 16*
10<d≤16 (252)* 630÷850* 480 700÷850* 16*
16<d≤40 241 630÷820 420 700÷850 16
40<d≤63 231 620÷790 410 700÷850 16
63<d≤100 228 610÷780 400 700÷850 16

*Values valid only for hot rolled products
For size <5 mm the mechanical properties may be agreed at the time of enquiry and order

Mechanical Properties – Bright Steel

Size
(mm)		 Cold Drawn (+C) Quenched + Tempered + Peeled (+QT +SH)* Quenched + Tempered + Cold Drawn (+QT +C)
Rp0,2 (MPa) min Rm (MPa) A5 (%) min Rp0,2 (MPa) min Rm (MPa) A5 (%) min Rp0,2 (MPa) min Rm (MPa) A5 (%) min
5≤d≤10 600 760÷1030 5 - - - 595 850÷1000 9
10<d≤16 530 710÷980 5 - - - 595 850÷1000 9
16<d≤40 460 660÷900 6 420 700÷850 16 490 700÷900 11
40<d≤63 430 650÷870 7 410 700÷850 16 490 700÷900 12
63<d≤100 390 630÷840 7 400 700÷850 16 490 700÷900 12


*This values are valid also for Cold Drawn - Quenched + Tempered Condition (+C +QT)
For size <5 mm the mechanical properties may be agreed at the time of enquiry and order

Working Temperatures Recommended

Operation °C
Hot forgings deformation 950÷1230
Normalizing  850÷880
Soft annealing   650÷700
Quenching in oil or water 840÷870
Tempering 540÷680
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