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Steel HP 9-4-30

HP 9-4-30 is a high strength, low alloy steel was conceived to be used in applications requiring high fracture toughness in the 220/240 KSI tensile range. Typically used in aircraft structural sections, this vacuum melted alloy exhibits exceptional cleanliness and weldability.

Chemical Properties

Element min max
Carbon 0.29 0.34
Manganese 0.10 0.35
Silicon 0.20
Phosphorus 0.010
Sulfur 0.010
Chromium 0.90 1.10
Nickel 7.00 8.00
Cobalt 4.25 4.75
Molybdenum 0.90 1.10
Vanadium 0.06 0.12
Copper 0.35

Mechanical Properties Tensile

Property Value
Tensile Strength 220 ksi
Yield Strength at 0.2% Offset 190 ksi
Elongation in 4D 10%
Reduction of Area 40%

Select AMS Number:

AMS Number Alloy Type UNS Cross Ref. Spec Misc./Shape
AMS 6524 HP 9-4-30 Steel K91313  
AMS 6524 Plate HP 9-4-30 Steel K91313 - Plate AMS 6524 Plate
AMS 6524 Sheet HP 9-4-30 Steel K91313 - Sheet AMS 6524 Sheet
AMS 6524 Strip HP 9-4-30 Steel K91313 - Strip AMS 6524 Strip
AMS 6526 HP 9-4-30 Steel K91283  
AMS 6526 Bar HP 9-4-30 Steel K91283 - Bar AMS 6526 Bar
AMS 6526 Forging HP 9-4-30 Steel K91283 - Forging AMS 6526 Forging
AMS 6526 Ring HP 9-4-30 Steel K91283 - Ring AMS 6526 Ring
AMS 6526 Tubing HP 9-4-30 Steel K91283 - Tubing AMS 6526 Tubing