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Maraging 250 / VASCOMAX® 250 Steel – AMS 6512

Maraging 250 / VASCOMAX® 250 Steel – AMS 6512

Maraging 250 / VASCOMAX® 250 is an 18% nickel, cobalt strengthened steel (C-type) with excellent properties, workability and heat treatment characteristics. Maraging is double vacuum melted by VIM (Vacuum Induction Melt) followed by VAR (Vacuum Arc Remelt). Maraging material is supplied in the annealed and descaled condition. The alloy is very tough, relatively soft (RC 30/35), readily machined or formed. Maraging provides a high value for critical parts in aerospace, structural, component and tooling applications.

<<Maraging 250 VASCOMAX® 250 Steel – AMS 6512 DATA SHEET>>

Chemical Composition:

Symbol Element Nominal %
C Carbon 0.03 max
Si Silicon 0.10 max
Mn Manganese 0.10 max
Ni Nickel 18.50
Co Cobalt 7.50
Mo Molybdenum 4.80
Ti Titanium 0.40
Al Aluminum 0.10
Fe Iron Balance

 

Maraging 250 Machinability (Annealed):

Operation Tool Material Tool Geometry Depth of cut Width of cut Feed Cutting Speed Wearland Cutting Fluid
Turning M2 or T-15 BR: 0°; SR: 10°
SCEA: 15°; ECEA: 5°
Relief: 5°; NR: 0.030 in
0.060 in 0.009 in/rev 80 ft/min 0.060 in Soluble oil (1:20)
Turning C3 BR: -5°; SR: -5°
SCEA: 15°; ECEA: 15°
Relief: 5°; NR: 0.030 in
0.009 in/rev 475 0.010 Soluble oil (1:20)
Face milling M2 or M-7 AR: 5°; RR: 5°; CA: 45°
ECEA: 10°; CI: 8°
0.060 2 in 0.005 in/tooth 140 0.060 Highly chlorinated oil
Face milling C2 AR: 10°; RR: 0° CA: 45°
ECEA: 10° CI: 8°
0.060 2 0.005 in/tooth 330 0.015 Dry
Peripheral end milling M2 Helix Angle: 30°; RR: 10°
CA: 45° x 0.060 in; CI: 7°
0.250 0.750 0.004 in/tooth 225 0.012 Soluble oil (1:20)
End mill slotting M2 Helix angle: 30°; RR: 10°
CA: 45 x 0.060 in; CI: 7°
0.250 0.750 0.002 in/tooth 140 0.012 Highly chlorinated oil
Drilling M1 118° plain point; CI: 7° 0.500 (through hole) 0.005 in/rev 100 0.015 Highly sulfurized oil
Reaming M2 Helix angle: 0°; CA: 45°
CI: 7°
0.500 (through hole) 0.009 in/rev 60 0.006 Highly sulfurized oil
Tapping M1 2 flute plug; 75% thread 0.500 (through hole) 150 Undersize threads Highly sulfurized oil

Machining data provided for informational purposes only.

VASCOMAX® is a registered trademark of Allegheny Technologies Incorporated / Allvac.

 

Maraging

MARtensitic – a very hard form of steel crystalline structure.

Subsequent AGING (precipitation hardening – approx 3-6 hours @ 900ºF yields optimum material characteristics)

 

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

 

Common Specifications:

AMS 6512

AMS 6520

MIL-S-46850 – Fracture Toughness Applies

 

Heat Treatment / Aging:

Maraging alloys are essentially carbon-free, a protective atmosphere is not required during annealing or aging. Material is supplied in the solution annealed condition with a hardness of 30/35 Rc. Typical heat treat time/temperature are listed below. Large cross sections should be aged for longer periods.

Temperature Time Resulting Hardness
900/925 °F 6 hrs 48/52 Rc

NOTE: A modified aging cycle is suggested for die casting applications for increased die life. The following thermal treatments have been used to obtain desirable characteristics for die casters. Following the rough machining of the die, anneal at 1500-1525 ºF for 1 hour per inch of thickness is typical. After finish machining, an aging heat treatment of 980-1000 ºF for 6 hours is typical.

 

We also supply
MARS190 D6AC AMS 4130
AMS 4340 MOD AMS 4340 AMS 4330 MOD
AMS 9310 AMS 13-8 PH AMS 15-5 PH
AMS 17-4 PH AMS 625 AMS 718
AerMet® 100 Maraging 250 Maraging 300
Maraging 350 Titanium Grade 5 Ti-6Al-4V ELI Titanium

About Us

Founded in 1998, FuShun covers an area of 3000 square meters, annual sales volume of 20000 tons. We are engaged in the manufacture and export of Tool Steel, Nickel Alloy, Stainless Steel and other special steel products…,View more content About Me.

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info@fushunspecialsteel.com

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