AMS HP 9-4-20

Grades | Stainless Steels | HP 9-4-20

AMS HP 9-4-20 ( Precipitation-Hardening )

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HP 9-4-20 Application:Steel, Bars, Forgings, Tubing, and Rings 0.75Cr - 9.0Ni - 4.5Co - 1.0Mo - 0.09V (0.17 - 0.23C) Consumable Electrode Vacuum Melted

Chemical composition(mass fraction)(wt.%) of the HP 9-4-20
Elements Min.（≥） Max.（≤） Similar Remarks
C 0.17 0.23
Si - 0.20
Mn 0.20 0.40
Ni - 0.65
Cr 0.65 0.85
Mo 0.90 1.10
Ni 8.50 9.50
V 0.06 0.12
P - 0.01
S - 0.01
Cu - 0.35
Co 4.25 4.75

Mechanical properties of grade HP 9-4-20

Yield
Rp0.2 (MPa)		 Tensile
Rm (MPa)		 Impact
KV (J)		 Elongation
A (%)		 Reduction in cross section on fracture
Z (%)		 As-Heat-Treated Condition HBW
229 (≥) 165 (≥) 23 42 23 Solution and Aging, Annealing, Ausaging, Q+T,etc 422

Physical properties of grade HP 9-4-20

Property Density
kg/dm3		 Temperature T
°C/F		 Specific heat
J / kgK		 Thermal conductivity
W/mK		 Electric resistance
µΩ·cm
732 (≥) 268 (≥) 21 22 41 Solution and Aging, Annealing, Ausaging, Q+T,etc
Temp.
°C/°F		 Creep strain limit
(10000h)
(Rp1,0) N/mm2		 Creep rupture strength
(10000h)
(Rp1,0) N/mm2		 - - -
537 435 296 - - -

HP 9-4-20 Range of products
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