ALTA 1.2329 steel have high resistance to thermal shock and heat cracking, good mechanical characteristics in hot condition, optimal mechanical characteristics in cold condition and good toughness in hot condition. Obtained through a special 'super clean' manufacturing process -ESR, which allows a high level of micro-purity to be achieved.
Applications
Special alloyed steel designed for dies, molds, punches and other components subjected to high working temperature, such as dies subjected to low pressure, containers for die-casting presses, extrusion press blocks and sleeves for extrusion presses.
Chemical composition
Chemical Composition per %
C
Si
Mn
P
S
Cr
Mo
V
Ni
Cu
Min.
0.43
0.60
0.65
1.65
0.25
0.17
0.45
Max.
0.48
0.75
0.85
0.025
0.015
1.85
0.35
0.22
0.60
0.30
Basic melting process :
IM/EAF + LF + VD + (ESR)
Heat treatment :
Annealing, EFS, Q & T
Surface condition :
Bar ends saw cut, machined / turned, black / grinded, sand blast. Free from any surface defects
Hardness :
Max 230 HB (annealed)
Reduction ratio :
5 : 1 minimum or required
Grain size :
≥ 5.0 per ASTM E112
Non-metallic inclusion :
≤ 1.0 (thick), ≤ 1.5 (thin) per ASTM E45 method A (more pure by ESR route)
Mechanical property
N.a.
Micro-structure
SEP1614 or NADCA # 207
Ultrasonic Test
SEP1921, EN 10228, ASTM A388
Macro-structure
As per ASTM E381
Straightness / flatness
≤ 1.5 mm / m (machined), ≤ 2.5 mm / m (black)
Tolerance
Per discussed
Impact test
Per discussed
Size range (round bars)
Ø 60 - 800 mm (2 2/5 inch – 31 1/2 inch)
Size range (flats, plates)
30 - 500 mm in thickness (1 1/5 inch – 19 3/5 inch)
max. 1000 mm in width (39 2/5 inch)
Rolled rounds are also available per request. Minimum diameter Ø 12 mm (1/2 inch)
