Cold work tool steel
ALTA 1.2842 Tool Steel Specification
Steel properties
ALTA 1.2842 steel is a Manganese–chrome–vanadium steel with the middle hardenability for hardening in oil, particularly good dimensional stability at the heat treatment, good resistance to the wear and cutting power. Considerable sensitivity to cooling by water during the hardening and tempering, good polishability, good ductility at the heat and good workability in the annealed state.
Applications
² Various precision measuring tools, templates, block gauges, dies
² Precision screws and grinder spindles requiring small deformation and high wear resistance
² Smaller punching dies, cold pressing dies, cold heading dies, engraving dies, blanking dies
² Slitting knife … etc.
Chemical composition
Chemical Composition per %
|
C |
Si |
Mn |
P |
S |
Cr |
V |
Ni |
Cu |
Min. |
0.85 |
0.10 |
1.80 |
|
|
0.20 |
0.05 |
|
|
Max. |
0.95 |
0.40 |
2.20 |
0.030 |
0.030 |
0.50 |
0.15 |
0.25 |
0.30 |
Basic melting process : |
IM/EAF + LF + VD + (ESR) |
Hardness : |
Max 220 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) |
Ultrasonic Test |
SEP1921, , EN 10308, ASTM A388 or agreed methods |
Macro-structure |
As per ASTM E381 |
Straightness / flatness |
≤ 1.5 mm / m (machined), ≤ 2.5 mm / m (black) |
Tolerance |
Per discussed |
Size range (round bars) |
Ø 12 - 600 mm |
Size range (flats, plates) |
8 - 500 mm in thickness max. 1100 mm in width |
Downloads
-
2024-06-25 Alta 1.2842 SPEC (011 - S6 - T2 ).pdf
끂34 246.42 KB
² High toughness, ductility
² Good dimensional stability
² Good wear resistance
² Good polishability
² Excellent machinability
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