AISI 1018 SAE UNS G10180 Carbon Steel Foundry

Steel foundry in China for producing AISI 1018 SAE UNS G10180 Carbon Steel castings. Today we will introduce the chemical composition, physical and mechanical properties and equivalent material grades of AISI 1018 Carbon Steel.

Chemical Composition

The chemical composition of AISI 1018 carbon steel is outlined in the following table.

ElementContent (%)
Manganese, Mn0.60-0.90
Carbon, C0.15-0.20
Sulfur, S0.05 (max)
Phosphorous, P0.04 (max)
Iron, FeBalance

Physical Properties

The physical properties of this grade of carbon steel are as below.

PropertiesMetricImperial
Density7.87 g/cm30.284 lb/in3

Mechanical Properties

The following table shows mechanical properties of cold drawn AISI 1018 carbon steel.

PropertiesMetricImperial
Tensile strength440 MPa63800 psi
Yield strength370 MPa53700 psi
Modulus of elasticity205 GPa29700 ksi
Shear modulus (typical for steel)80 GPa11600 ksi
Poisson’s ratio0.290.29
Elongation at break (in 50 mm)15%15%
Hardness, Brinell126126
Hardness, Knoop (converted from Brinell hardness)145145
Hardness, Rockwell B (converted from Brinell hardness)7171
Hardness, Vickers (converted from Brinell hardness)131131
Machinability (based on AISI 1212 steel. as 100 machinability)7070

Thermal Properties

The thermal properties of this grade material are showed as the table below.

PropertiesMetricImperial
Thermal conductivity51.9 W/mK360 BTU in/hr.ft2.°F

Other Designations

Other designations that are equivalent to AISI 1018 carbon steel include:

AMS 5069ASTM A29ASTM A512ASTM A611 (D-1)ASTM A635
AMS 5069AASTM A510ASTM A794ASTM A519ASTM A544
ASTM A108ASTM A513ASTM A830ASTM A545ASTM A548
ASTM A549ASTM A659SAE J412SAE J1397MIL S-11310 (CS 1018)
ASTM A576SAE J403SAE J414MIL J-1397MIL J-403

Fabrication and Heat Treatment

  • Machinability

AISI 1018 carbon steel is rated at 62% of AISI 1112 carbon steel. Machining can provide this alloy with a good finish and continuous and hard chips. The alloy can be processed under all conditions.

  • Forming

It is easy to form this grade of carbon steel under annealing conditions.

  • Welding

AISI 1018 carbon steel can be welded using most conventional methods, such as gas, acetylene oxide, resistance and submerged fusion welding.

  • Heat treatment

This Grade can be surface hardened to Rc 42, but only in thin sections. If the thicker part exceeds 4 in. , You can get Rc 28-30.

  • Forging

AISI 1018 carbon steel can be forged in the range of 996-1260°C (1825-2300°F).

  • Thermal processing

AISI 1018 carbon steel can be easily hot processed.

  • Cold working

The cold working of AISI 1018 carbon steel will affect the hardness and mechanical properties. Intermediate annealing must be performed to overcome the alloy’s tendency to work hardening.

  • Annealing

The alloy can be fully annealed by soaking at 899°C (1650°F) and then cooling in the furnace. Process annealing can be carried out at a temperature of 649°C (1200°F).

Applications

AISI 1018 carbon steel is commonly used in high-volume screw machine parts applications. We can also find this alloy in applications as shafts, spindles, pins, rods, sprocket assemblies.

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