Our engineers have a meeting with the research of maraging 350 high strength steel.
customer ordered maragng 350 steel from us for aircraft usage withe following commitment.
chemical analyse of c350 steel
3.1.1 (Wt%)
|
C |
Si |
Mn |
S |
P |
Ni |
Co |
Mo |
Ti |
Al |
Cr |
Cu |
|
≤0.030 |
≤0.10 |
≤0.10 |
≤0.01 |
≤0.01 |
18.0/19.0 |
11.50/12.50 |
4.60/5.20 |
1.30/1.60 |
0.05/0.15 |
≤0.5 |
≤0.5 |
3.2 mechanical property of maraging 350 steel
mechanical property requirement after quenching and tempering
|
σb MPa Tensile strength |
Yield strength |
δ5 % elongation |
Ψ % reduction of area |
AKv J impact |
KIC |
HRC hardness |
|
|
≥2255 |
≥2155 |
≥7 |
≥38 |
≥14 |
Actual test |
≥50 |
quenching and tempering method
Method 820℃×1h,AC+480℃×3h,AC