Heat Resistant Alloys
NAS 750
A precipitation hardening alloy with a nickel base, NAS 750 provides corrosion resistance along with superior tensile strength, creep rupture and fatigue resistance up to 700℃. It is used in a wide range of applications such as aircraft and power generation gas turbine parts, nuclear reactor parts, pressure containers, heat-resistant springs and hot working tools. Nippon Yakin supplies this product in coil and sheet forms.
Coil
Sheet
Chemical Composition
JIS G4902 / NCF750
| C | Si | Mn | P | S | Ni | Cr | Cu | Co | Al | Ti | Fe | Nb+Ta | Ta | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | ― | ― | ― | ― | ― | 70.00 | 14.00 | ― | ― | 0.40 | 2.25 | 5.00 | 0.70 | ― |
| Max | 0.08 | 0.50 | 1.00 | 0.030 | 0.015 | ― | 17.00 | 0.50 | ― | 1.00 | 2.75 | 9.00 | 1.20 | ― |
SAE AMS 5542
| C | Si | Mn | P | S | Ni | Cr | Cu | Co | Al | Ti | Fe | Nb+Ta | Ta | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | ― | ― | ― | ― | ― | 70.00 | 14.00 | ― | ― | 0.40 | 2.25 | 5.00 | 0.70 | ― |
| Max | 0.08 | 0.50 | 1.00 | ― | 0.01 | ― | 17.00 | 0.50 | 1.00 | 1.00 | 2.75 | 9.00 | 1.20 | 0.05 |
Mechanical Properties
Solution treatment
JIS G4902 / NCF750 S1
| 0.2% Yield strength (N/mm2) |
Tensile strength (N/mm2) |
Elongation (%) |
Hardness (HV) |
Grain size number |
|---|---|---|---|---|
| ― | ≤ 890 | ≥ 40 | ≤ 335 | ― |
SAE AMS 5542
| 0.2% Yield strength (N/mm2) |
Tensile strength (N/mm2) |
Elongation (%) |
Hardness (HV) |
Grain size number |
|---|---|---|---|---|
| ≤ 448 | ≤ 896 | ≥ 40 | ― | ≥ 2.5 |
Solution treatment and aging
JIS G4902 / NCF750 H1
| 0.2% Yield strength (N/mm2) |
Tensile strength (N/mm2) |
Elongation (%) |
Hardness (HV) |
|---|---|---|---|
| ≥ 615 | ≥ 960 | ≥ 8 | ≥ 270 |
SAE AMS 5542
| 0.2% Yield strength (N/mm2) |
Tensile strength (N/mm2) |
Elongation (%) |
Hardness (HV) |
|---|---|---|---|
| ≥ 689 | ≥ 1069 | ≥ 20 | ≥ 30HRC (≥ 302HV) |