Melting Point of Steel – Low (Mild)-High Carbon Steel Melting Temperature (Temp)

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Melting Point of Steel – Low (Mild), Medium & High Carbon Steel Melting Temperature (Temp)

The melting point of steel is 1300-1540°C (2370-2800°F), depending primarily on the chemical composition of the steel, which can affect the strength of the bonds between atoms. The stronger the bond strength between atoms, the higher the melting temperature.

The melting point of carbon steel depends on the carbon content, generally, the higher the carbon content in the steel, the lower its melting temperature. The melting point of stainless steel and other alloy steels is mainly affected by alloying elements. In addition, the melting temperature of steel is also affected by external pressure. As the external pressure increases, the melting temp of steel decreases. That is, steel will melt more easily and more rapidly when heated at higher pressures.

Why is the Melting Point of Steel a Range, Not an Exact Point?

As mentioned at the beginning, the steel melting point mainly depends on the strength of the bonds between the atoms in the chemical composition (alloying element).

All pure metals have stable melting points, for example, pure iron has a melting point of 2,800°F (1,538°C) because it has only one metallic element – “Fe”.

Unlike pure iron, steel has a variety of metallic elements, and each alloying element usually has a specified content range, which results in steel alloys with a wide melting temperature range. In addition, there are hundreds of steel grades, and the chemical composition of different grades of steel varies. Even for the same steel grade, the melting temperature is not exact, taking the most commonly used 304 stainless steel (also known as 18/8 stainless steel, containing 18-20% Cr and 8-10.5% Ni) as an example, the melting temperature range is 2550-2790 °F (1400-1530 °C), because the content of each alloying element is not a fixed value. In addition, steel manufacturers adjust the alloy ratio within the specified alloy content range according to their needs, and different batches of steel have slightly different metal element content. Therefore, you can only measure the melting point of steel with a specific chemical composition.

Melting Temperature of Various Steel Grades

Approximate Melting Temp of Various Steel Classification is listed below for reference:

  • Melting temperature of steel: 1300-1540°C (2370-2800°F)
  • Melting point of iron (Fe): 1538°C (2800°F);
  • Stainless steel melting point: 1400-1530 °C (2550-2790 °F);
  • Low carbon steel/Mild steel melting point: 1450-1530 °C (2640-2800 °F);
  • Medium/High carbon steel melting temperature: 1425-1530 °C (2600-2800 °F);
  • Galvanized steel melting point: 1400-1530 °C (2550-2790 °F);
  • Cast iron melting temperature: 1200°C (2200°F);
  • Wrought iron melting point: 1510 °C (2750 °F);
  • Fe2O3 melting point: 1539 °C (2802 °F);
  • High speed steel melting point: Around 1430 °C (2605 °F);
  • Alloy steel melting temperature: 1400-1530 °C (2550-2790 °F);
  • Cold rolled steel: 1425-1540 °C (2600-2800 °F)
Approximate Melting Point of Various Steel Grades
Steel Grades Celsius (°C) Fahrenheit (°F)
Carbon Steel 1425-1530 2600-2785
Mild steel (low carbon) 1450-1530 2640-2785
High carbon steel 1425-1510 2600-2750
Medium carbon steel 1425-1510 2600-2750
A36 steel 1425-1530 2600-2785
S235 1450-1530 2640-2785
AISI 1020 1515 2760
Alloy Steel 1400-1530 2550-2790
AISI 4140 1425 2600
4340 steel 1505 2740
9% Ni steel 1500 2730
Maraging steels (18Ni-200) 1455 2650
Stainless Steel 1400-1530 2550-2790
AISI 201 1400-1450 2550-2650
AISI 304, 304L 1400-1450 2550-2650
AISI 316, 316L 1375-1400 2500-2550
AISI 405 1480-1530 2700-2790
AISI 409 1480-1530 2700-2790
AISI 420 1450-1510 2650-2750
AISI 430 1425-1510 2600-2750
AISI 440C 1370-1480 2500-2700
AISI 446 1425-1510 2600-2750
17-4 PH 1400-1440 2560-2625
AM 350 1400 2550
Pure Iron (Fe) 1538 2800
Ingot iron 1535 2795
Wrought iron 1510 2750
Pig iron 1200 2200
Gray cast iron 1175 2150
Malleable iron 1230 2250
Ductile iron 1175 2150
Fe2O3 1539 2802
Ni-Resists (15.5-35% Ni) 1230 2250
Duriron (14.5% Si) 1260 2300
Cast Stainless Steels 1290-1510 2350-2750
CA-15 1510 2750
CA-40 1495 2725
CB-7Cu-1 1510 2750
CF-8 1425 2600
CF-3M 1400 2550
CF-20 1415 2575
CH-20 1425 2600
CN-7M 1455 2650
HA 1510 2750
HC 1495 2725
HD 1480 2700
HE 1455 2650
HF 1400 2550
HH 1370 2500
HK 1400 2550
HL 1425 2600
HN 1370 2500
HP, HT, HU 1345 2450
HW, HX 1290 2350

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