Alloy Information Report for Alloy Steel 2515

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General Characteristics of Alloy Steel 2515

Also known as AISI-SAE 2515, Alloy Steel 2515 is a nickel steel formulated to meet the needs of low-temperature and heavy-duty carburizing applications. Alloy Steel 2515 resists corrosion better than basic carbon steel.

Chemical Composition of Alloy Steel 2515

2515

• Carbon 0.12-0.17
• Manganese 0.40-0.60
• Phosphorus 0.035 max (lower levels appropriate for low-heat applications)
• Sulfur 0.40 max (lower levels appropriate for low-heat applications)
• Silicon 0.20-0.35
• Nickel 4.75-5.25
• Iron balance

2515H

• Carbon 0.12-0.18
• Manganese 0.30-0.70
• Phosphorus 0.035 max (lower levels appropriate for low-heat applications)
• Sulfur 0.040 max (lower levels appropriate for low-heat applications)
• Silicon 0.20-0.35
• Nickel 4.70-5.30
• Iron balance     

Heat Treatment of Alloy Steel 2515

• Normalize at 1525° to 1575°F (829° to 857°C) before air cooling
• Anneal at 1500° to 1550°F (816° to 843°C) before furnace cooling to produce maximum hardness of 197 Brinell
• Carburize at 1650° to 1700°F (899° to 927°C)
• Gas or pack carburize
• Speed carburizing at 2000°F (1093°C)
• Harden by heating carburized alloy from 1400° to 1575°F (760° to 857°C) before oil quenching; heat non-carburized alloy to 1450° to 1575°F (788° to 857°C) before water or oil quenching
• Temper carburized alloy 300° to 450°F (149° to 232°C); non-carburizned alloy to 1100°F (593°C) for required toughness and strength

Applications of Alloy Steel 2515

• Carburized components: special and heavy-duty applications
• Uncarburized alloy: low-heat applications

Machinability of Alloy Steel 2515

• Standard carburizing alloy equipment and processes:
  • Normalized
  • Normalized and tempered
  • Quenched and tempered
  • Isothermally transformed to Rockwell C 13-25
• Easily machine when cold drawn with continuous, hard chip
• Cold drawn: 55% AISI B112 Bessemer screw stock
• Normalized or hot rolled: 45% AISI B112 Bessemer screw stock

Workability of Alloy Steel 2515

• Hot work 1900° to 2250°F (1038° to 1232°C)
• Finish at 1700°F (927°C)
• Account for exceptional strength of Alloy 2515 when cold forming with typical processes for normal carbon steel

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