|Thickness:||0.1 To 6 Mm||Width:||10 To 400 Mm|
|Delivery Condition 1:||Cold Rolled + Hardened + Tempered||Delivery Condition 2:||Cold Rolled + Soft Annealed : G|
|Steel Number:||1.5029||Steel Grade:||71Si7|
|Surface Condition:||Bright, Grey-blue, Polished, Polished And Colour-tempered||Form:||Steel Coils Strips|
1.5029 Cold Rolled Steel Strips,
71Si7 Cold Rolled Spring Steel Strip,
Springs Cold Rolled Steel Strips
Cold rolled steel strip for springs is distinguished by high dimensional accuracy and good surface quality and, in the cold rolled + hardened + tempered condition (H + A) offers the possibility of achieving high values of hardness, tensile strength and elastic limit.
71Si7 1.5029 steel is an unalloyed medium carbon engineering steel which has 0.68%-0.75% Carbon and 1.5%-1.8% Silicon. It will obtain high hardness and high strength after hardening due to the relatively high carbon content.
Thickness: 0.1 to 4mm; Tolerances: +/- 0.008 to 0.11 mm
Width: 10 to 600mm; Tolerances: +/- 0.15 to 0.60mm
|Steel number||grade number||C||Si||Mn||P||S|
|71Si7||1.5029||0,68 to 0,75||1,50 to 1,80||0,60 to 0,80||0,035||0,035|
Cold rolled + soft annealed : G
Cold rolled + hardened + tempered : H + A
|Steel number||grade number||Tensile strength N/mm2 maximum||Elongation at break (L = 80 mm) % minimum||Vickers hardness maximum|
|Steel number||grade number||Tensile strength N/mm2|
|71Si7||1.5029||1500 to 2200|
|Steel number||grade number||Vickers hardness|
|71Si7||1.5029||445 to 650|
Strip to be supplied in the
1 cold rolled + soft annealed G or
2 cold rolled + soft annealed + cold rolled (G + K) condition
must have a bright, metallically clean surface.
Cold rolled + hardened + tempered (H + A) strip is supplied, as agreed at the time of ordering, with
1 grey-blue (GR),
2 bright (8K),
3 polished (P) or
4 polished and colour-tempered (P & AF) surface.
Approximate values for heat treatment and minimum hardness values in the hardened condition of cold rolled steel strips for springs
|Steel number||grade number||Annealed °C||Hardened in oil at °C||Tempered to °C||Vickers hardness in hardened condition minimum|
|71Si7||1.5029||650 to 690||810 to 840||300 to 500||680|
EN 10204/3.1 with all relevant data reg. chem. composition, mech. properties and results of testing.
Contact Person: Ms. Florence Tang