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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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AMS 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, Bars, Forgings, Tubing, and Rings 0.75Cr - 9.0Ni - 4.5Co - 1.0Mo - 0.09V (0.17 - 0.23C) Consumable Electrode Vacuum Melted

Property

	Value
Tensile Strength	190 ksi
Yield Strength at 0.2% Offset	180 ksi
Elongation in 4D	12%
Reduction of Area	45%

Select AMS Number:

AMS Number	Alloy	Type	UNS	Cross Ref. Spec	Misc./Shape
AMS 6468	HP 9-4-20	Steel	K91461	-	Wire
AMS 6523	HP 9-4-20	Steel	K91472
AMS 6523 Plate	HP 9-4-20	Steel	K91472	-	Plate
AMS 6523 Sheet	HP 9-4-20	Steel	K91472	-	Sheet
AMS 6523 Strip	HP 9-4-20	Steel	K91472	-	Strip
AMS 6525	HP 9-4-20	Steel	K91472
AMS 6525 Bar	HP 9-4-20	Steel	K91472	-	Bar
AMS 6525 Forging	HP 9-4-20	Steel	K91472	-	Forging
AMS 6525 Ring	HP 9-4-20	Steel	K91472	-	Ring
AMS 6525 Tubing	HP 9-4-20	Steel	K91472	-	Tubing

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

Standard Number:

ITEM	Standard Number	Descriptions
1	SAE AMS 6525D (2012)	Steel, Bars, Forgings, Tubing, and Rings 0.75Cr - 9.0Ni - 4.5Co - 1.0Mo - 0.09V (0.17 - 0.23C) Consumable Electrode Vacuum Melted
2	SAE AMS 6525	This specification covers a premium aircraft-quality, low-alloy steel in the form of bars, forgings, mechanical tubing, flash welded rings, and stock for forging or flash welded rings.
3	AMS 6523	This specification covers a premium aircraft-quality, low-alloy steel in the form of sheet, strip, and plate.

Metallographic Structure:Precipitation-Hardening
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

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	ASTM	USA
HP 9-4-20	UNS	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		0.20
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

Tensile strength	270～453	σb/MPa
Yield Strength	067	σ 0.2 ≥/MPa
Elongation	03	δ5≥(％)
ψ	-	ψ≥(％)
Akv	-	Akv≥/J
HBS	235～669	-
HRC	30	-

Physical Properties

Thermal expansion	67-45	e-6/K
Thermal conductivity	18-36	W/m.K
Specific heat	450-460	J/kg.K
Melting temperature	4382-9377	째C
Density	6463-9074	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