9Ni-4Co-0.30C steel in Q&T (quenched and tempered) condition is a high-strength, low-alloy steel designed for aerospace structural applications requiring yield strengths in the 1,380–1,720 MPa range with good fracture toughness and fatigue resistance. This nickel-cobalt-carbon composition is specified in AMS 6524a and AMS 6526 for critical fasteners, forgings, and structural components where a combination of high bearing strength, compressive yield strength, and controlled ductility is essential for damage-tolerant design.
Compliance & Regulations
1 interactive curve for this material
Stress-strain, S-N fatigue and environmental knockdown curves are free with an account.
Create free account| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Ultimate Bearing Strength(Fbru)4 entries | 2.386 | GPa | 22°C · Sheet/Strip/Plate · Quenched and tempered · AMS 6524a · t=≥0.250 in · e/D=1.5 | ||
| ↳ | 2.386 | GPa | 22°C · Bar/Forging/Tubing · Quenched and tempered · AMS 6526 · t=≤4.000 in · e/D=1.5 | ||
| ↳ | 3.034 | GPa | 22°C · Sheet/Strip/Plate · Quenched and tempered · AMS 6524a · t=≥0.250 in · e/D=2 | ||
| ↳ | 3.034 | GPa | 22°C · Bar/Forging/Tubing · Quenched and tempered · AMS 6526 · t=≤4.000 in · e/D=2 | ||
Bearing Yield Strength(Fbry)4 entries | 2.006 | GPa | 22°C · Sheet/Strip/Plate · Quenched and tempered · AMS 6524a · t=≥0.250 in · e/D=1.5 | ||
| ↳ | 2.006 | GPa | 22°C · Bar/Forging/Tubing · Quenched and tempered · AMS 6526 · t=≤4.000 in · e/D=1.5 | ||
| ↳ | 2.220 | GPa | 22°C · Sheet/Strip/Plate · Quenched and tempered · AMS 6524a · t=≥0.250 in · e/D=2 | ||
| ↳ | 2.220 | GPa | 22°C · Bar/Forging/Tubing · Quenched and tempered · AMS 6526 · t=≤4.000 in · e/D=2 | ||
Compressive Modulus(Ec) | 205.5 | GPa | 22°C · Sheet/Strip/Plate | ||
Compressive Yield Strength(Fcy)2 entries | 1.441 | GPa | 22°C · Bar/Forging/Tubing · Quenched and tempered · AMS 6526 · L · t=≤4.000 in | ||
| ↳ | 1.441 | GPa | 22°C · Sheet/Strip/Plate · Quenched and tempered · AMS 6524a · LT · t=≥0.250 in | ||
Elongation at Break(εf)3 entries | 10.00 | - | 22°C · Bar/Forging/Tubing · Quenched and tempered · AMS 6526 · L · t=≤4.000 in | ||
| ↳ | 6.000 | - | 22°C · Sheet/Strip/Plate · Quenched and tempered · AMS 6524a · LT · t=≤0.249 in | ||
| ↳ | 10.00 | - | 22°C · Sheet/Strip/Plate · Quenched and tempered · AMS 6524a · LT · t=≥0.250 in | ||
Reduction of Area(RA)2 entries | 40.00 | - | 22°C · Bar/Forging/Tubing · Quenched and tempered · AMS 6526 · L · t=≤4.000 in | ||
| ↳ | 35.00 | - | 22°C · Sheet/Strip/Plate · Quenched and tempered · AMS 6524a · LT · t=≥0.250 in | ||
Ultimate Shear Strength(Fsu)2 entries | 944.6 | MPa | 22°C · Sheet/Strip/Plate · Quenched and tempered · AMS 6524a · t=≥0.250 in | ||
| ↳ | 944.6 | MPa | 22°C · Bar/Forging/Tubing · Quenched and tempered · AMS 6526 · t=≤4.000 in | ||
S–N Curve (Wöhler)(S–N) | Curve (14 pts) | Pa | — | ||
Ultimate Tensile Strength(σUTS)3 entries | 1.517 | GPa | 22°C · Bar/Forging/Tubing · Quenched and tempered · AMS 6526 · L · t=≤4.000 in | ||
| ↳ | 1.517 | GPa | 22°C · Sheet/Strip/Plate · Quenched and tempered · AMS 6524a · LT · t=≤0.249 in | ||
| ↳ | 1.517 | GPa | 22°C · Sheet/Strip/Plate · Quenched and tempered · AMS 6524a · LT · t=≥0.250 in | ||
Yield Strength (0.2% offset)(σy)3 entries | 1.310 | GPa | 22°C · Bar/Forging/Tubing · Quenched and tempered · AMS 6526 · L · t=≤4.000 in | ||
| ↳ | 1.276 | GPa | 22°C · Sheet/Strip/Plate · Quenched and tempered · AMS 6524a · LT · t=≤0.249 in | ||
| ↳ | 1.310 | GPa | 22°C · Sheet/Strip/Plate · Quenched and tempered · AMS 6524a · LT · t=≥0.250 in | ||
Young's Modulus(E) | 196.5 | GPa | 22°C · Sheet/Strip/Plate |
| Property | Value | Unit | Conditions | Source | |
|---|---|---|---|---|---|
Density(ρ) | 7.750 | kg/m³ | 22°C |