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Description

USA UNS SAE AMS 6438F (2001), D6AC Specialsteel Steel, Sheet, Strip, and Plate 1.05Cr - 0.55Ni - 1.0Mo - 0.12V (0.45 - 0.50C) Consumable Electrode Vacuum Melted and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: D6AC
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel D6AC Precipitation-Hardening UNS USA Steel, Sheet, Strip, and Plate 1.05Cr - 0.55Ni - 1.0Mo - 0.12V (0.45 - 0.50C) Consumable Electrode Vacuum Melted

Chemical composition(mass fraction)(wt.%) of the D6AC

C Si Mn P S Ni Cr Al Cu Ti Fe Mo Co V
≤0.47 ≤0.22 ≤0.75 ≤ ≥ ≤ ≥ ≤0.55 ≤1.05 ≤ ≥ ≤ ≥ ≤ ≥ ≤remaining ≤1.00 ≤ ≥ ≤0.10

Mechanical Properties of steel grade D6AC

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV/Ku (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
821 (≥) 498 (≥) 12 14 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 134

Physical Properties of steel grade D6AC

Temperature
(°C)
Modulus of elasticity
(GPa)
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)
Specific thermal capacity
(J/kg·°C)
Specific electrical resistivity
(Ω mm²/m)
Density
(kg/dm³)
Poisson’s coefficient, ν
34 - -     0.32 -  
669 371 - 12.3 443   -  
624 - 13 41.2   132 211

Heat Treatment of steel grade D6AC

Heat treated : 1647°C - 1499°C

Technological Curves of steel grade D6AC

Relevant standard of D6AC

SAE AMS 6438F (2001) Steel, Sheet, Strip, and Plate 1.05Cr - 0.55Ni - 1.0Mo - 0.12V (0.45 - 0.50C) Consumable Electrode Vacuum Melted SAE-AMS-6438F-(2001).pdf

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