AISI 1040 SAE UNS G10400 Carbon Steel Foundry

AISI 1040 SAE UNS G10400 Carbon Steel Foundry

China’s steel foundry produces AISI 1040 SAE UNS G10400 carbon steel castings. The following is the material’s chemical composition, physical and mechanical properties and equivalent material grades.

Chemical Composition

ElementContent (%)
Iron, Fe98.6-99
Manganese, Mn0.60-0.90
Carbon, C0.370-0.440
Sulfur, S≤ 0.050
Phosphorous, P≤ 0.040

Physical Properties

PropertiesMetricImperial
Density (chemical composition of 0.435% C, 0.69% Mn, 0.20% Si, annealed at 860°C (1580°F))7.845 g/cc0.2834 lb/in³
Melting point1521°C2770°C

Mechanical Properties

PropertiesMetricImperial
Tensile strength620 MPa89900 psi
Yield strength415 MPa60200 psi
Bulk modulus (typical for steels)140 GPa20300 ksi
Shear modulus (typical for steels)80 GPa11600 ksi
Elastic modulus190-210 GPa27557-30458 ksi
Poisson’s ratio0.27-0.300.27-0.30
Elongation at break (in 50 mm)25%25%
Reduction of area50%50%
Hardness, Brinell201201
Hardness, Knoop (converted from Brinell hardness)223223
Hardness, Rockwell B (converted from Brinell hardness)9393
Hardness, Rockwell C (converted from Brinell hardness. Value below normal HRC range, for comparison purposes only)1313
Hardness, Vickers (converted from Brinell hardness)211211
Izod impact (annealed at 790°C (1450°F))45 J33.2 ft-lb
Izod impact (as rolled)49 J36.1 ft-lb
Izod impact (normalized at 900°C (1650°F)65 J47.9 ft-lb

Thermal Properties

PropertiesMetricImperial
Thermal expansion co-efficient (@ 20-100°C/68-212°F, composition of 0.40% C, 0.11% Mn, 0.01% P, 0.03% S, 0.03% Si, 0.03% Cu)11.3 µm/m°C6.28 µin/in°F
Thermal conductivity (@ 100°C/212°F)50.7 W/mK352 BTU in/hr.ft².°F
Thermal conductivity (@ 0°C)51.9 W/mK360 BTU in/hr.ft².°F

Other Designations

Other designations that are equivalent to AISI 1040 carbon steel include: ASTM A29 (1040), ASTM A510 (1040), ASTM A513, ASTM A519 (1040), ASTM A546 (1040), ASTM A576 (1040), ASTM A682 (1040), ASTM A827, ASTM A830, MIL S-11310 (CS 1040), MIL S-16788, MIL S-46070, SAE J1397 (1040), SAE J403 (1040), SAE J412 (1040)

Fabrication and Heat Treatment

  • Machinability

The cutting performance grade of AISI 1040 carbon steel is 60.

  • Forming

AISI 1040 carbon steel can be formed under annealing conditions.

  • Welding

AISI 1040 carbon steel can be welded using all welding techniques. Due to its high carbon content, it can be preheated at a temperature of 149 to 260°C (300 to 500°F) and heated at a temperature of 594 to 649°C (1100 to 1200°F).

  • Heat treatment

AISI 1040 carbon steel can be heat treated at 844 to 899°C (1550 to 1650°F), then quenched and tempered in water.

  • Forging

AISI 1040 carbon steel can be forged at a temperature of 982 to 1260°C (1800 to 2300°F).

  • Thermal processing

AISI 1040 carbon steel can be hot processed at a temperature of 94 to 483°C (200 to 900°F).

  • Cold working

AISI 1040 carbon steel can be cold worked in an annealed state using conventional methods.

  • Annealing

AISI 1040 carbon steel can be annealed at a temperature of 872 to 983°C (1600 to 1800°F). It can then be slowly cooled in the furnace. The stress relief annealing process can be performed at a temperature of approximately 594°C (1100°F). Normalized treatment can also be performed at 899°C (1650°F) and then slowly cooled.

  • Tempering

AISI 1040 carbon steel can be tempered at a temperature of 316 to 705°C (600 to 1300°F) depending on the required strength.

  • Hardening

AISI 1040 carbon steel can be hardened by cold work.

Applications of carbon steel casting

AISI 1040 carbon steel can be used for couplings, crankshafts and cold head parts.

Yide Casting is known as a professional steel foundry in China, has rich casting experience in casting and machining, we are committed to producing quality but competitive price casting steel parts for our customers, all of our casting parts have been marked as “JM”, we want to develop Yide casting, JM casting into the world, if you are looking for a steel foundry, please don’t hesitate to contact us, send us your drawing file, we’d like to serve you and provide best casting iron products.

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