Tech Steel & Materials
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 |
- |
Plate |
| AMS 6524 |
HP 9-4-30 |
Steel |
K91313 |
- |
Sheet |
| AMS 6524 |
HP 9-4-30 |
Steel |
K91313 |
- |
Strip |
| AMS 6526 |
HP 9-4-30 |
Steel |
K91283 |
- |
Bar |
| AMS 6526 |
HP 9-4-30 |
Steel |
K91283 |
- |
Forging |
| AMS 6526 |
HP 9-4-30 |
Steel |
K91283 |
- |
Ring |
| AMS 6526 |
HP 9-4-30 |
Steel |
K91283 |
- |
Tubing |
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