ThePipingMart Blog Grades SAE – AISI 1030 Carbon Steel (UNS G10300) – Uses, Composition and Properties

SAE – AISI 1030 Carbon Steel (UNS G10300) – Uses, Composition and Properties

SAE / AISI 1030 Steel

SAE/AISI 1030 steel is a medium carbon alloy widely used in many applications, ranging from automotive and aerospace to industrial. It’s known for its strength, hardness, and ductility. This overview will look at the chemical composition of SAE / AISI 1030 steel and its physical, mechanical, and thermal properties. We will also discuss how it’s used in machining and welding.

AISI 1030 Composition

SAE / AISI 1030 steel is composed of 0.28-0.33% Carbon (C), 0.60-0.90% Manganese (Mn), 0.04-0.035% Phosphorus (P), 0.04% Sulphur (S), and 0.15-0.30% Silicon (Si). Additionally, trace amounts of other elements are found in SAE / AISI 1030 steel, such as Nickel (Ni) and Copper (Cu).

Element Content (%)
Iron, Fe 98.67-99.13
Manganese, Mn 0.60-0.90
Carbon, C 0.270-0.340
Phosphorous, P ≤ 0.040
Sulfur, S ≤ 0.050

AISI 1030 Mechanical Properties

The mechanical properties of AISI 1030 steel include the following:

  • A tensile strength of 550 MPa with an ultimate strength of 690 MPa.
  • Yield strength of 400 MPa with an elongation percentage at breakage of 30%.
  • A modulus of elasticity at 20 °C temperature range of 210 GPa with a Brinell hardness rating between 180 – 200 HBW at room temperature range.
Properties Metric Imperial
Tensile strength, ultimate 525 MPa 76100 psi
Tensile strength, yield 440 MPa 63800 psi
Modulus of elasticity 190-210 GPa 29700-30458 ksi
Bulk modulus (typical for steel) 140 GPa 20300 ksi
Shear modulus (typical for steel) 80 GPa 11600 ksi
Poissons ratio 0.27-0.30 0.27-0.30
Elongation at break (in 50 mm) 12% 12%
Reduction of area 35% 35%
Hardness, Brinell 149 149
Hardness, Knoop (converted from Brinell hardness) 169 169
Hardness, Rockwell B (converted from Brinell hardness) 80 80
Hardness, Vickers (converted from Brinell hardness) 155 155
Machinability (based on AISI 1212 steel. as 100 machinability) 70 70

AISI 1030 Physical Properties

The physical properties associated with AISI 1030 carbon steel include a density value ranging from 7800 kg/m3 to 7900 kg/m3; and a melting point value ranging from 1425 °C to 1450 °C. Additionally, it has good wear resistance characteristics coupled with good impact strength values making it an ideal choice for various components or parts which require these properties for their successful performance in the long run.

Properties Metric Imperial
Density 7.85 g/cc 0.284 lb/in3
Melting point 1510°C 2750°F

AISI 1030 Uses

Sae 1030 carbon steel has been used for components such as shafts, gears, bolts, dowels etc., where high strength is required, but ductility also plays an important role in their performance over time. It has also been used for high-duty parts such as pistons due to its higher hot formability features and cold forming capabilities, making it suitable for complex geometries where forming operations are involved during the production process. Furthermore, this grade can be applied in automotive components such as engines, drive shafts, axles, transmissions etc., since they require more strength than standard grades can offer while still utilizing the desired level of ductility during the production process.

AISI 1030 Equivalent

ASTM A29 (1030) ASTM A546 (1030) SAE J403 (1030)
ASTM A510 (1030) ASTM A576 (1030) SAE J412 (1030)
ASTM A512 (1030) ASTM A682 (1030) DIN 1.1172
ASTM A513 (1030) ASTM A830 UNI CB 35
ASTM A519 (1030) MIL S-11310 (CS 1030) ASTM A108
ASTM A544 (1030) FED QQ-S-700(C1030) FED QQ-S-635
ASTM A545 (1030) SAE J1397 (1030)

AISI 1030 Thermal Properties

Properties Metric Imperial
Thermal expansion co-efficient (@15-75°C/59-167°F) 11.7 µm/m°C 6.50 µin/in°F
Thermal Conductivity 51.9 W/mK 360 BTU in/hr.ft2.°F

Corrosion Resistance

The corrosion resistance property associated with grade 1020 carbon steel includes excellent oxidation resistance when exposed to elevated temperatures up to 1200°F without any significant loss in its mechanical properties even after prolonged periods subjected to such temperatures.

Heat Resistance

Furthermore, it offers good resistance against non-oxidizing acids such as hydrochloric acid when utilized within their safe operating limits along with air or inert gas mixtures.

Heat Treatment

Lastly, heat treatment processes on this grade usually involve normalizing at 1050°F followed by water or oil quenching depending upon the desired end product requirements.


When machining on this grade, one should take into account the fact that hardening may occur if cutting speeds are too high or if incorrect tool materials are utilized during machining operations, thus resulting in work hardening, which affects overall dimensional accuracy .,


When welding on this alloy 1030, it is recommended that preheat treatments be performed before welding operations since this help reduce warpage due to thermal stresses imposed on the material during welded joint formation while also improving overall weld quality post-weldment cooling cycles. Moreover, post-weld heat treatments must generally be avoided since they affect overall mechanical properties adversely by softening them significantly due to grain growth effects generated during heating cycles before the cool-down operation occurs.


In summary, we have discussed why SAE/AISI1030 Steel is important when considering its chemical composition, physical properties such as density values and melting points, mechanical properties including tensile strengths and yield strengths; use where high strength is required, but ductility also plays an important role; corrosion resistance characteristics; heat treatment processes; machining considerations; welding procedures; and post-weldment cooling cycles recommendations—all factors that make this grade critical when looking for superior performance from your components or parts over time!

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