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AISI 300M Alloy Steel (UNS K44220)

AISI 300M Alloy Steel (UNS K44220) Image

Alloy steels are designated by AISI four-digit numbers. They contain different kinds of steels having compositions which exceed the limitations of B, C, Mn, Mo, Ni, Si, Cr, and Va set for carbon steels.

AISI 300M alloy steel is a low alloy and vacuum melted steel. It is a modified version of AISI 4340 steel. It has high content of molybdenum and silicon than that of AISI 4340 steel. It has high strength, good toughness, fatigue strength and ductility. The following datasheet gives more details about the AISI 300M alloy steel.

 

MACHINABILITY RATINGS

APPROXIMATE SURF. FT. PER MIN.

95

Percent RELATIVE SPEED BASED ON C-1212 as 100 Percent

57

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Category::
Alloy Steel Grades
Chemical Composition:
Chemical Composition The chemical composition of the AISI 300M alloy steel is tabulated below.
Element Content (%)
Iron, Fe 93.4 - 94.8
Nickel, Ni 1.65 - 2.0
Silicon, Si 1.45 - 1.80
Chromium, Cr 0.70 - 0.95
Manganese, Mn 0.65 - 0.90
Carbon, C 0.40 - 0.460
Phosphorous, P 0.035
Molybdenum, Mo 0.30 - 0.45
Vanadium, V 0.050
Sulfur, S 0.040

Other Designations:
BAR/WIRE:  SHEET/STRIP:  PLATE:
AMS-6417 AMS-6419 MIL-S-8844   N/A N/A
 TUBE:  PIPE: FORGINGS:
N/A N/A AMS-6417 AMS-6419

Inventory:
In Stock
Mechanical Properties:
Mechanical Properties The following table shows the mechanical properties of AISI 300M alloy steel.
Properties Imperial
Shear modulus (typical for steel) 11600 ksi
Elastic modulus 29700 ksi
Poisson's ratio 0.28

Density:
0.284 lb/in³
Thermal Properties:

Forming:
AISI 300M alloy steel can be formed in the annealed condition using conventional techniques.
Welding:
AISI 300M alloy steel can be welded using flash resistance welding or fusion welding methods. Approved procedures such as including pre and post-heating practice are followed for performing the fusion welding method because this alloy can be air-hardened due to the heat produced by welding. This process is followed by re-normalizing, or re-normalizing and tempering before heat treatment.
Heat Treatment:
AISI 300M alloy steel is normalized at 927°C (1700°F). It is then heated at 872°C (1600°F) followed by oil quenching oil and tempering.
Forging:

Hot Working:

Cold Working:
AISI 300M alloy steel has good ductility, and can be cold worked in the annealed or normalized condition using conventional techniques.
Annealing:
AISI 300M alloy steel is annealed at 844°C (1550°F) followed by slowly cooling in the furnace. It can be then air cooled.
Tempering:
AISI 300M alloy steel can be tempered at (600°F) to achieve 300 ksi strength.
Hardening:
AISI 300M alloy steel can be hardened by cold working and heat treatment.
Melting Point:
2590°F
Applications:
AISI 300M alloy steel is used in high strength bolts, airframe parts, and aircraft landing gear.
Machinability:
AISI 300M alloy steel can be easily machined in normalized, or normalized and tempered conditions. Due to hardness of the heat treated alloy, the grinding process is performed with extreme care. After grinding, stress relief annealing is performed at 288°C (550°F).

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AISI 300M Alloy Steel (UNS K44220)

AISI 300M Alloy Steel (UNS K44220) Image

Alloy steels are designated by AISI four-digit numbers. They contain different kinds of steels having compositions which exceed the limitations of B, C, Mn, Mo, Ni, Si, Cr, and Va set for carbon steels.

AISI 300M alloy steel is a low alloy and vacuum melted steel. It is a modified version of AISI 4340 steel. It has high content of molybdenum and silicon than that of AISI 4340 steel. It has high strength, good toughness, fatigue strength and ductility. The following datasheet gives more details about the AISI 300M alloy steel.

 

MACHINABILITY RATINGS

APPROXIMATE SURF. FT. PER MIN.

95

Percent RELATIVE SPEED BASED ON C-1212 as 100 Percent

57

If you need more details about this product or would like to place an order, please call us!

CALL US NOW
1-800-631-0728