X90CrMoV18
Stainless steel HuaNickel X90CrMoV18 is a high-carbon martensitic stainless steel. As a martensitic stainless steel, X90CrMoV18 is magnetic and can be hardened by heat treatment. The high carbon content in HuaNickel X90CrMoV18 has high hardness and strength. Despite the high carbon content, the chromium content is still enough to maintain its stainless steel properties. Martensitic steels are typically used in applications that require high strength and moderate corrosion resistance.
X90CrMoV18Chemical composition：
| Cr | C | Mn | Si | Mo | P | S | Fe | |
| Min | 16 | 0.95 | – | – | – | – | – | Bal |
| Max | 18 | 1.2 | 1 | 1 | 0.75 | 0.04 | 0.03 |
X90CrMoV18Physical properties：
| Density | 0.275 lb/in³ |
| Melting point | 2500 – 2700°F |
X90CrMoV18Mechanical properties：
| Temperature, °F | 70 |
| Ultimate tensile strength, ksi | 285 |
| 0.2% yield strength, ksi | 275 |
| Elongation, % | 2 |
| Reduced Area, % | 10 |
| Hardness, Brinell | 580 |
X90CrMoV18Stainless steel characteristics：
After heat treatment, the highest hardness of any stainless steel can be achieved
The highest carbon content of 400 series stainless steel
X90CrMoV18Uses of stainless steel：
Seat
Surgical instruments
Bearings, casings, nozzles
Structural aircraft components
X90CrMoV18Process performance：
Welding properties: Due to its high hardness, this steel is rarely welded. However, if welding is required, the parts should be preheated and held at about 500°F, welded, and then immediately annealed at 1350/1400°F for 6-8 hours, slow furnace cooling. Between welding and annealing, parts are not allowed to cool below 500°F.
Heat treatment: Preheat to 1400/1500°F, then slowly and evenly heat to 1900/2100°F. Do not forge below 1750°F and reheat frequently if necessary. Heat and cool slowly. The forging is annealed and cooled to room temperature before annealing
Relevant standards：
ASTM: A 276 AMS: 5630, 5880