SAE/AISI 1050 Carbon Steel Sheet: Properties, Applications & Buying Guide
In this blog, we’ll break down the properties, applications, and advantages of oxygen-free copper, helping you understand why it’s preferred over standard copper in various industries.
SAE/AISI 1050 Carbon Steel Sheet: Properties, Applications & Buying Guide
SAE/AISI 1050 carbon steel is a medium-high carbon steel grade renowned for its excellent strength, wear resistance, and versatility. It is one of the most frequently specified grades in heavy engineering and manufacturing sectors. In this guide, we explore the composition, mechanical properties, common applications, and how to select the right 1050 CS sheet for your project.
Chemical Composition of SAE/AISI 1050 CS Sheet
The designation “1050” in the SAE/AISI classification system indicates approximately 0.50% carbon content along with manganese, phosphorus, and sulphur in controlled quantities. The typical chemical composition is as follows:
- Carbon (C): 0.48 – 0.55%
- Manganese (Mn): 0.60 – 0.90%
- Phosphorus (P): Max 0.04%
- Sulphur (S): Max 0.05%
This composition places 1050 in the medium-high carbon range, offering a balance between machinability and tensile performance that sets it apart from lower-grade steels.
Mechanical Properties
SAE/AISI 1050 carbon steel sheet exhibits the following typical mechanical properties in the normalised condition:
- Tensile Strength: 690–850 MPa
- Yield Strength: 360–580 MPa
- Hardness (Brinell): 170–229 HB
- Elongation: 12–20%
These properties make 1050 suitable for applications requiring moderate-to-high strength without the brittleness associated with very high carbon steels. Heat treatment such as quenching and tempering can further enhance its hardness and strength.
Key Applications of SAE/AISI 1050 CS Sheet
The SAE/AISI 1050 carbon steel sheet is extensively used across multiple industries:
Automotive and Transportation
It is used for manufacturing gears, shafts, axles, and springs in automotive systems where fatigue resistance under cyclic loading is essential.
Agricultural Equipment
Tractor parts, plough blades, cultivator discs, and other farm machinery components frequently use 1050 CS due to its hardness and wear resistance.
General Engineering
Keys, couplings, machine parts, and structural components benefit from the strength and machinability of 1050 steel.
Tooling
At higher hardness levels after heat treatment, 1050 is used for light tooling, punches, and wear plates.
Heat Treatment of SAE/AISI 1050
1050 steel responds well to heat treatment processes:
- Annealing: Heat to 790–870°C and slow cool to improve machinability
- Normalising: Heat to 870–925°C and air cool to relieve internal stresses
- Quenching and Tempering: Achieve Rockwell C 25–58 depending on tempering temperature
The ability to tailor hardness through heat treatment makes 1050 a flexible choice for component manufacturers.
Comparison with SAE/AISI 1060
While 1050 and 1060 are both medium-high carbon steels, they serve somewhat different purposes. The 1060 grade has higher carbon content (0.55–0.65%), delivering greater hardness and spring properties at the expense of some machinability and weldability. For applications where formability and machining are priorities, 1050 is the better choice.
Read our detailed comparison and product page for SAE/AISI 1060 Carbon Steel Sheet to understand which grade best fits your requirements.
Availability and Specifications
SAE/AISI 1050 carbon steel sheets are available in hot-rolled and cold-drawn finishes. OM Steel stocks 1050 sheets in a wide range of thicknesses and dimensions, with custom cutting available to order. All material is supplied with Mill Test Certificates (MTC) and full traceability documentation.
Why Source from OM Steel?
OM Steel has decades of experience supplying high-quality carbon steel sheets to industries across India and globally. Our quality management system ensures every batch meets SAE/AISI standards and our technical team is available to assist with grade selection, size requirements, and delivery scheduling.
FAQ's
Need Help?
We're Here for You!
Feel free to contact us any time. we will get back to you as soon as we can!
Ask Anything
Do you have any questions?
A: Carbon steel relies on carbon content alone for its properties. Alloy steel adds elements like chromium, nickel, molybdenum, and vanadium to achieve specific improvements — higher strength, better low-temperature toughness, creep resistance, or corrosion resistance — giving it a far broader performance range than carbon steel.
A: For ambient to 400°C service, ASTM A516 Grade 70 is the standard choice. For high-temperature refinery or power plant use (up to 600°C), ASTM A387 Grade 11 or 22 (chrome-moly) applies. For cryogenic service down to -196°C, 9% nickel steel (ASTM A553) is required.
A: Wear-resistant grades like AR400/AR500 are quenched to martensitic hardness of 370–500 HB — 3–4× harder than structural grades like A572-50. They resist abrasive wear in mining and construction equipment but have limited weldability and are not suitable as primary structural members.
A: CE (= C + Mn/6 + (Cr+Mo+V)/5 + (Ni+Cu)/15) predicts susceptibility to hydrogen-induced cold cracking during welding. Sheets with CE above ~0.40 require preheating to slow cooling and allow hydrogen diffusion, preventing weld cracking. Always develop a qualified WPS based on the specific CE value.
