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HP 9-4-20 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of HP 9-4-20

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ASTM HP 9-4-20

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This page is mainly introduced the HP 9-4-20 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of HP 9-4-20,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Steel, Sheet, Strip, and Plate 0.75Cr - 9.0Ni - 4.5Co - 1.0Mo - 0.09V (0.17 - 0.23C) Vacuum Consumable Electrode Melted, Annealed

Steel Garde:HP 9-4-20
Type:Stainless Steels
Country:USA
Standard:ASTM

Standard Number:

ITEM	Standard Number	Descriptions
1	SAE AMS 6523G (2011)	Steel, Sheet, Strip, and Plate 0.75Cr - 9.0Ni - 4.5Co - 1.0Mo - 0.09V (0.17 - 0.23C) Vacuum Consumable Electrode Melted, Annealed

Metallographic Structure:Precipitation-Hardening
Application:Steel, Sheet, Strip, and Plate 0.75Cr - 9.0Ni - 4.5Co - 1.0Mo - 0.09V (0.17 - 0.23C) Vacuum Consumable Electrode Melted, Annealed

Cross Reference Table(Equivalent Materials):

Material	Standard	Country
A 646 Grade HP 9-4-20	SAE	USA
HP 9-4-20	ASTM	USA
HP 9-4-20	UNS	USA
HP 9-4-20	AMS	USA
HP 9-4-25	ASTM	USA
HP 9-4-25	UNS	USA
A 646 Grade HP 9-4-30	SAE	USA
HP 9-4-30	ASTM	USA
HP 9-4-30	ASTM	USA
HP 9-4-30	UNS	USA
HP 9-4-30	UNS	USA

Chemical composition(mass fraction)(wt.%)

Elements	Min.（≥）	Max.（≤）
C	0.17	0.23
Si		0.10
Mn		0.20
Ni		0.65
Cr		0.40
Al	4.25	4.75
Cu
Ti
Fe
Mo		0.85
Co	8.50	9.50
V	0.06	0.12
P		0.01
S		0.01
W	0.90	1.10

Mechanical Properties

Tensile strength	544～760	σb/MPa
Yield Strength	052	σ 0.2 ≥/MPa
Elongation	75	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	276～390	-
HRC	30	-

Physical Properties

Thermal expansion	14-67	e-6/K
Thermal conductivity	55-63	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	0277-9784	째C
Density	5359-4517	kg/m³
Resistivity	0.50-0.60	Ohm.mm²/m

Heat Treatment Regime

Annealing	Quenching	Tempering	Normalizing	Q & T
√	√	√	√	√

Size Availability

Steel Grade	Specification	Processing range(mm)
HP 9-4-20 Stainless Steels	Round Bar and Hollow Bar	Φ1 to Φ2000
	Square and Flat Steel	Φ10 to Φ100
	Plate and Sheet	0.08-800(Thickness)10-1500(Width)Length
	Tube or Pipe	OD:Φ4-410; WT:1-35 mm; Lenght:10-12000
	Coil and Strip Steel	THK:0.1mm Width:1500mm
	Forged	Ring/Cylindrical/Disk