SPRING STEELS
QUALITIES
Recommended heat treatment
Annealing
(°C)= 650-700
Hot forming
(°C)= = 920-830
Hardening
(°C)= = 840-860
Tempering
(°C)=.450-500
SIZES
Germany
G.B.
U.S.A.
DIN 17221
BS 970
part 5
SAE
51 Si7
60Si Cr7
EN 45 A 250 A 61
9150
9260
55 Cr3
50CrV4
ALLOYSTEEL
EN 11 527 A 60
EN 47 735 A 50
5160
6150
other qualities on request
ROUNDS
Ø8 to 38 mm (in coils or bars)
tolerances to DIN 2077 or similar
FLATS
18x5mmto 155x30mm
Tolerances to DIN4620
EDGES
Standard mill edge
Round edge
LENGTH:
Standard 4 to 6 meter, tol. - 0/+200 mm
Shorts max. 10% allowed
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