Cold work tool steel
ALTA 1.2721 Tool Steel Specification
Steel properties
ALTA 1.2721 is similar as ALTA 1.2767, with its high nickel content, this material offers a very good combination of through hardenability and toughness.
Applications
² High pressure molds
² Cold heading dies
² Cutting tools, knives and other mechanical parts
² Punching tools, forming, bending and embossing tools
Chemical composition
Chemical Composition per %
|
C |
Si |
Mn |
P |
S |
Cr |
Mo |
V |
Ni |
Cu |
Min. |
0.45 |
0.15 |
0.40 |
|
|
0.90 |
/ |
/ |
3.00 |
|
Max. |
0.55 |
0.35 |
0.60 |
0.020 |
0.010 |
1.20 |
/ |
/ |
3.50 |
0.25 |
Basic melting process : |
IM/EAF + LF + VD + (ESR) |
Hardness : |
Max 250 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 - 500 mm |
Size range (flats, plates) |
8 - 400 mm in thickness max. 1100 mm in width |
Downloads
-
2024-09-15 Alta 1.2721 SPEC (011 - S6 - T1 ).pdf
끂15 253.69 KB
Features
² High toughness
² High hardenability
² Good dimensional stability
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