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1.0577 Structural steel
Designation
DIN:
S 355 J2 (St 52-3)
AFNOR:
A 52 FP
UNI:
-
AISI:
A738
Chemical composition:
C
≤ 0.22
Si
≤ 0.55
Mn
≤ 1.60
Strength:
132 - 185 HB (≈ 450 - 630 N/mm²)
Thermal conductivity at 20 °C:
40 W/m K
Character:
unalloyed structural steel with good weldability
Application:
for common applications in die, mould, and jigs and fixtures construction
Treatment by
Welding: very good weldability due to its low carbon content
not usual:
Polishing, etching, EDM, nitriding, hard chroming
Heat treatment:
Soft annealing: 650 to 700 °C for about 2 to 5 hours slow controlled cooling of 10 to 20 °C per hour to about 600 °C; further cooling in air, max. 180 HB
Technical tip
If no welding is required, we recommend 1.1730 ⇒ better machinability in spite of higher strength
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