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NEWS
Short Description:
Maraging 250 is an age hardenable iron-nickel steel alloy melted as VIM + VAR with ultra high strength and toughness. This alloy is easily machinable in the annealed condition prior to final heat treatment. This grade has improved fracture toughness from Maraging 300 but slightly less strength. The unique properties makes it suitable for many critical aerospace applications
Product Description
Characteristic：
Excellent Mechanical Properties
- high yield and ultimate tensile strengths
- high toughness, ductility and impact strengths
- high fatigue strength
- high compressive strength
- hardness and wear resistance sufficient for many tooling applications
Excellent Workability
- high resistance to crack propagation
- readily formed – cold, warm, hot (w/o in process anneals)
- good weldability w/o preheating or post heating
- excellent polishability
Advantages During Application
- low coefficient of expansion minimizes heat checking
- pitting and corrosion resistance superior to common tool steel
- good repair weldability
- excellent mechanical properties have led to longer tool life
- easily reworked and retreated for secondary tool life
Maraging 250 Chemical Composition
| % | C | Si | Mn | P | S | Al | B | Ca | Co | Cr | Mo | Ni | Ti | Zr | Cu | Fe |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Min | – | – | – | – | – | 0.05 | – | – | 7 | – | 4.6 | 17 | 0.3 | – | – | Bal |
| Max | 0.03 | 0.1 | 0.1 | 0.01 | 0.15 | 0.15 | 0.005 | 0.05 | 8.5 | 0.5 | 5.2 | 19 | 0.5 | 0.02 | 0.05 |
Maraging 250 Physical Properties
| Density | Modulus of Elasticity | Average Co of Thermal Expansion |
|---|---|---|
| 8.0 g/cm | 27.0 x 10-6 psi | 5.6 x 10-6 in/in/°F |
| Temperature | Time | Resulting Hardness |
|---|---|---|
| 900/925 °F | 6 hrs | 48/52 Rc |
- Bars & Rods & Foring Ring /Flanges
- Sheet & Plate
- Strip & Coil
- Welding Wire &Spring wire
- Seamless Tube & Welded Pipe
»Round Bar & Square Bar & Hexagon Bar
● Diameter : φ8～φ300mm Length:10mm-6000mm
● Hot forging, Hot Rolling, Cold Drawing
● Bright Surface, Polished Surface, Black Surface
»Tube & Pipe:Seamless Tube& Welded Pipe
● Cold Drawing Seamless Pipe： φ1.0～φ220mm
● Hot Extrusion pipe: φ50～φ250mm
● Others : U Blend Tube and Elbow
»Hot Rolled Plate & Cold Rolled Sheet
● Cold Rolling Sheet Thickness: ≦2.0mm Width:≦1500m
● Hot rolling Plate Thickness: ≧4.0mm Width: ≦2500m
»Strip & Tape Ribbon
● Thickness: ≧ 0.01mm Width: 15mm-300mm
● Cold rolling BA Strip, Hard & Soft Condition
»Straight Length Wire & Spool Wire
● Welding Wire: φ 0.1mm～6.0mm Cut length Rod: φ1.0～φ8.0mm
● Package : 5-25kg/Spool or Box
Maraging 250 ApplicationsI
- Aircraft assemblies
- Mortar tubes
- Extrusion dies
- Rocket motor cases
- Pressure vessels