What is 1035 Carbon Steel?
1035 carbon steel is a medium-carbon alloy containing approximately 0.35% carbon, along with balanced levels of manganese. This composition enables it to offer moderate strength, good toughness, and fair machinability, making it a reliable choice for a range of applications under light to medium loads. Common uses include shafts, studs, bolts, and other general-purpose machine parts where a balance of ductility and strength is needed.
With proper heat treatment, 1035 steel can achieve increased hardness and tensile strength, though not as high as grades with higher carbon content. In addition, it is amenable to forging and can be cold drawn to improve dimensional accuracy. As with other carbon steels, 1035 does not inherently provide significant corrosion resistance, so a protective treatment or finish may be necessary in corrosive environments. Overall, 1035 carbon steel serves well in scenarios that require steady performance, moderate strength, and practical workability.

1035 Carbon Steel Equivalents
1035 Carbon Steel is a medium-carbon steel offering good tensile strength and wear resistance. Its equivalents across international standards are:
- AISI/ASTM: 1035
- JIS (Japan): SS43
- KS (Korea): SS 35
- China: 35#
- Europe: C35
- IS (India): IS 226/1035
- GOST (Russia): 35
1035 Carbon Steel Chemical Composition
1035 carbon steel is classified as a medium carbon steel, with a specific composition that defines its properties.
| Element | Content |
| Silicon (Si) | ≤0.35% |
| Manganese (Mn) | 0.60%-0.90% |
| Sulfur (S) | ≤0.050% |
| Phosphorus (P) | ≤0.040% |
The balance of these elements results in a material that combines moderate strength with excellent formability, making it suitable for a wide range of industrial applications.
1035 Carbon Steel Mechanical Properties
1035 carbon steel exhibits reliable mechanical properties, distinguishing it as a widely used material in manufacturing.
| Property | Value |
| Tensile Strength | 585-660MPa |
| Yield Strength | 370-530MPa |
| Elongation | 17%-23% |
| Brinell Hardness | 170-210HB |
The section shrinkage of 1035 carbon steel is 53%. The high section shrinkage indicates that the material is able to withstand large plastic deformations before fracture. This further indicates that 1035 carbon steel has good plasticity and toughness. This contributes to the safety and reliability of the parts.
Manufacturing Forms and Processes
Firstly, raw material preparation. Select suitable pig iron, scrap steel, etc. and test. Then put it into the electric arc furnace or induction furnace melting. During the period, the chemical composition, temperature and other parameters are precisely controlled to ensure the quality of steel. After melting, deoxidizing treatment is carried out. Then casting is carried out. After that, according to the casting characteristics, choose natural cooling, forced cooling and other ways to make it solidify. Then the castings are cleaned, decontaminated and mechanically processed. Finally, the quality inspection ensures that it meets the standard.
1035 Carbon Steel Applications
Mechanical manufacturing: commonly used in the manufacture of various mechanical parts. Such as gears, shafts, connecting rods, crankshafts, shafts, pins, levers, beams, sleeves, rims, washers and so on.
Automobile manufacturing: can be used to manufacture automobile crankshafts, suspension parts, engine parts, transmission parts, wheel hubs, bolts, nuts, etc..
Energy: in energy production equipment, such as turbines and generators.
Agricultural machinery: can be used in the manufacture of agricultural machinery and equipment in a variety of parts.
Aerospace: can be used to manufacture parts such as landing gears for airplanes.
Shipbuilding: it has a certain degree of corrosion resistance, and can be used to manufacture some structural parts, shaft parts, propellers, etc. of ships.
Advantages of 1035 Carbon Steel
- Good mechanical properties: medium strength, toughness and plasticity. Suitable for a variety of engineering applications. Can meet the requirements of strength and toughness of many mechanical parts and structural components.
- Better machinability: good cutting performance. Easy to carry out mechanical processing. Such as turning, milling, drilling and so on.
- Weldability is OK: can be connected and assembled by welding technology. For the manufacture of large structural parts and complex components to provide a convenient.
- Low cost of raw materials: carbon steel raw materials from a wide range of sources. The price is relatively low.
- Heat treatment adaptability: through different heat treatment processes. Such as normalizing, quenching, tempering and so on.
Limitations of 1035 Carbon Steel
- Poor corrosion resistance: carbon steel is susceptible to rusting in wet environments or when exposed to corrosive media.
- Limited hardenability: for larger sized workpieces, it is difficult to obtain uniform and consistent properties through quenching, and is prone to deformation and cracking.
- Insufficient hot hardness: when the working temperature is higher than 200℃, its hardness and wear resistance will drop sharply.
- Poor low-temperature toughness: at low temperatures, the toughness of carbon steel will be significantly reduced.
Case Study
A construction machinery manufacturer faced insufficient fatigue life in 1035 carbon steel hydraulic connecting rods, with service life at 93% of the design target. Hengke Metals’ failure analysis traced the issue to microstructural inconsistency from heat treatment.
We developed a “gradient quenching + multi-stage tempering” process, precisely controlling cooling rates and applying a three-stage tempering to refine microstructure. This improved fatigue life to 102% of the target and cut performance variation by 25%. The solution reduced warranty claims by 30% and boosted product competitiveness, reflecting Hengke’s philosophy of “controlling microstructure to improve macro performance” through tailored engineering.

By Mr.Sun



