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ISO 683-14 59Si7 steel plate, ISO 59Si7 spring steel

ISO 683-14 59Si7

Spring steel ISO 683-14 59Si7 main features and application

Spring steel ISO 683-14 59Si7 is a kind of pre-hardened material well suited for fabrication requiring shaping by blanking, bending, drawing, extrusion and swaging. Spring steel ISO 683-14 59Si7 allows for closer dimensional tolerances and improved finish and available in several grades. Grade selection is important when considering higher levels of wear resistance.
ISO 683-14 59Si7 spring steels are mainly used for the manufacture of railway rolling stock, cars and tractors on the leaf spring and coil spring, the safety valve spring, shock absorber on a variety of heavy machinery, instrument springs, friction plate.

Equivalent table of spring steel ISO 683-14 59Si7 under different standard

TOCT 14959 / DIN 17221 / GB/T 1222 / NF A35-571 / ISO 683-14 / ASTM / JIS G4801 / BS 970 Part 2
A29M / A322
60C2T
60C2A / 60SiCr7 / 60Si2Mn / 61SiCr7 / 59Si7 / 9260 / G92600 / SU P6
SU P7 / 251 H60

Spring steel ISO 683-14 59Si7 chemical composition data:(% in mass)

C / Si / Mn / Cr / p / S / Ni / Cu
0.56-0.64 / 1.50-2.00 / 0.60-0.90 / ≤0.35 / ≤0.035 / ≤0.035 / ≤0.35 / ≤0.25

Spring steel ISO 683-14 59Si7 mechanical property and delivery condition.

Product Type / Delivery Condition / Mechanical property / Delivery Hardness
HB
Rm
Mpa / Rel
Mpa / A11
% / Z
% / Sample
Hot rolled round bar/square bar / Hot rolled / ≥
1270 / ≥
1180 / ≥
5 / ≥
25 / Q+T / 321
Forged round bar/square bar / Hot rolled
Hot rolled strips / Hot rolled
Cold drawing round bar / Hot processing / 1270 / 1180 / 5 / 25 / - / -
Hot rolled thin plate / Hot rolled / 950 / - / 12 / - / - / -
Cold rolled steel strips / Y+T+QT / 785-1180
885 / Y
T
T=tempering;Q=quenching;QT=globurizing;Y=chilling

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