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UNS D6AC Details

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D6AC Application:Steel, Sheet, Strip, and Plate 1.05Cr - 0.55Ni - 1.0Mo - 0.12V (0.45 - 0.50C) Consumable Electrode Vacuum Melted

Category Type Grade Microstructure Designations
Grades Stainless Steels D6AC Precipitation-Hardening USA - UNS , 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

Chemical composition(wt.%) of D6AC grade: SAE AMS 6438F (2001)

Elements Min.(≥) Max.(≤) Similar Remarks
C - 0.47
Si - 0.22
Mn - 0.75
P - -
S - -
Ni - 0.55
Cr - 1.05
Al - -
Cu - -
Ti - -
Fe - remaining
Mo - 1.00
Co - -
V - 0.10
Steel, Sheet, Strip, and Plate 1.05Cr - 0.55Ni - 1.0Mo - 0.12V (0.45 - 0.50C) Consumable Electrode Vacuum Melted

Mechanical properties of grade D6AC SAE AMS 6438F (2001)

Proof strength
Rp0.2 (MPa)
Tensile strength
Rm (MPa)
Impact energy
KV (J)
Elongation at fracture
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
649 (≥) 514 (≥) 22 11 44 Solution and Aging, Annealing, Ausaging, Q+T,etc 241

Physical properties of grade D6AC SAE AMS 6438F (2001)

Property Density
kg/dm3
Temperature T
°C/F
Specific heat
J / kgK
Thermal conductivity
W/mK
Electric resistance
µΩ·cm
Modulus of elasticity
kN/mm2
Expansion rate
791 (≥) 789 (≥) 44 13 34 Solution and Aging, Annealing, Ausaging, Q+T,etc 324
Temp.
°C/°F
Creep strain limit
(10000h)
(Rp1,0) N/mm2
Creep rupture strength
(10000h)
(Rp1,0) N/mm2
192 126 623

D6AC - Form of Supply

Product type Products Dimension Processes Deliver Status
Plates / Sheets Plates / Sheets 0.08-200mm(T)*W*L Forging, hot rolling and cold rolling Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel Bar Round Bar, Flat Bar, Square Bar Φ8-1200mm*L Forging, hot rolling and cold rolling, Cast Black, Rough Turning, Shot Blasting,
Coil / Strip Steel Coil /Steel Strip 0.03-16.0x1200mm Cold-Rolled & Hot-Rolled Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / Tubes Seamless Pipes/Tubes, Welded Pipes/Tubes OD:6-219mm x WT:0.5-20.0mm Hot extrusion, Cold Drawn, Welded Annealed, Solution and Aging, Q+T, ACID-WASHED

Cross Reference Table(Equivalent Grade)

Grade Standard Country Application
D6AC ASTM USA
Steel, Bars, Forgings, and Tubing 1.05Cr - 0.55Ni - 1.0Mo - 0.11V (0.45 - 0.50C) Vacuum Consumable Electrode Remelted
D6AC ASTM USA
Steel Bars, Forgings, and Tubing 1.05Cr - 0.55Ni - 1.0Mo - 0.12V (0.43 - 0.49C)
D6AC ASTM USA
Steel, Sheet, Strip, and Plate 1.05Cr - 0.55Ni - 1.0Mo - 0.12V (0.45 - 0.50C) Consumable Electrode Vacuum Melted
D6AC ASTM USA
Steel Sheet, Strip, and Plate 1.05Cr - 0.55Ni - 1.0Mo - 0.12V (0.42 - 0.48C) (D6AC) Consumable Electrode Vacuum Melted, Annealed
D6AC ASTM USA
Steel Bars, Plates, Sheets, Billets, and Reforging Stock Type D6AC
D6AC ASTM USA
Steel, Welding Wire 1.05Cr - 0.55Ni - 1.0Mo - 0.07V (0.34 - 0.40C) Vacuum Melted, Environment-Controlled Packaging
D6AC UNS USA
Steel, Bars, Forgings, and Tubing 1.05Cr - 0.55Ni - 1.0Mo - 0.11V (0.45 - 0.50C) Vacuum Consumable Electrode Remelted
D6AC UNS USA
Steel Bars, Forgings, and Tubing 1.05Cr - 0.55Ni - 1.0Mo - 0.12V (0.43 - 0.49C)
D6AC UNS USA
Steel, Sheet, Strip, and Plate 1.05Cr - 0.55Ni - 1.0Mo - 0.12V (0.45 - 0.50C) Consumable Electrode Vacuum Melted
D6AC UNS USA
Steel Sheet, Strip, and Plate 1.05Cr - 0.55Ni - 1.0Mo - 0.12V (0.42 - 0.48C) (D6AC) Consumable Electrode Vacuum Melted, Annealed
D6AC UNS USA
Steel Bars, Plates, Sheets, Billets, and Reforging Stock Type D6AC
D6AC UNS USA
Steel, Welding Wire 1.05Cr - 0.55Ni - 1.0Mo - 0.07V (0.34 - 0.40C) Vacuum Melted, Environment-Controlled Packaging

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