Carbon Steel 1215

1215 Steel is a type of CNC steel known for its chemical composition containing sulfur, iron, phosphorous, carbon, and manganese. Due to its high sulfur content, it is recognized as free-machining steel.

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Stacked machined metal flanges on blue tray

G12150
1.0715

550 MPa

Ultimate Tensile Strength
480 MPa

Yield Strength
200 GPa

Young's Modulus(Elasticity)
10 %

Elongation at Break

At a Glance

Material Type
Metal
Material Name
Carbon Steel 1215
Alternative Names
G12150 | 1.0715
Process Compatibility
CNC Milling, CNC Turning

Properties Table of Carbon Steel 1215

Properties

Ultimate Tensile Strength 550 MPa(80,000 psi)
Yield Strength 480 MPa(70,000 psi)
Young's Modulus(Elasticity) 200 GPa(29 x 10^6 psi)
Elongation at Break 10%
Physical Properties
Corrosion Resistance Limited corrosion resistance, susceptible to rust
Magnetism Generally magnetic
UV Resistance Limited UV resistance
Weldability Good weldability with proper precautions
Thermal Properties
Maximum Service Temperature Around 250°C(482°F)
Thermal Expansion Coefficient 11.5 x 10^-6/°C
Thermal Conductivity 49 W/(m·K)
Electrical Properties
Electrical Resistivity 2.15 x 10^-7 ohm-meter
ESD Safety Carbon Steel 1215 is a conductor, so ESD safety is generally good

Applications of Carbon Steel 1215

Automotive bushings
Fasteners (bolts, screws)
Shafts and axles
Precision gears
Hydraulic fittings
Pins and dowels
Instrument levers

Advantages of Carbon Steel 1215

Excellent machinability
Improved tool life
Consistent and predictable machining
Cost-effective for high-volume production
Good surface finish
Weldable with proper techniques
Suitable for small precision parts

Raw Stock

CNC Machined

Finished Parts

Carbon Steel 1215 — Machining Notes

Carbon Steel 1215 in CNC
is Carbon Steel 1215?

Carbon Steel 1215 in CNC Machining

1215 Steel is a type of CNC steel known for its chemical composition containing sulfur, iron, phosphorous, carbon, and manganese. Due to its high sulfur content, it is recognized as free-machining steel.

It is a low alloy, fast-cutting steel widely recognized as the standard for screw stock. It is re-sulphurized and re-phosphorized, giving its excellent cutting speeds and machining characteristics. This steel allows for faster machining rates and reduces CNC machine entanglements by forming small chips during machining. It is ideal for automatic screw machining and is commonly used for bushings, inserts, hydraulic hose fittings, couplings, studs, pins, and more.

It has lower strength than some cold-drawn grades due to its relatively low carbon content. It contains carbon (C) within the range of 0.0 to 0.09%, manganese (Mn) between 0.75 and 1.05%, phosphorus (P) ranging from 0.04 to 0.09%, and sulfur (S) falling between 0.26 and 0.35%. The remaining balance is comprised of iron (Fe). It responds well to roll threading, is flexible, and can be easily bent and shaped without cracking, but it may not be the best choice for components exposed to intense fatigue stress.

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What is Carbon Steel 1215?

Carbon Steel 1215 is a type of carbon steel known for its easy machinability. It contains sulfur, which enhances its machinability by promoting the formation of small, broken chips during machining.

It is commonly used for applications like screws and bolts. However, while it’s easy to machine, it may have lower strength compared to some other carbon steels.

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FAQ

Can you weld 1215 carbon steel?

Welding 1215 carbon steel can be challenging due to its higher sulfur content, leading to issues like hot cracking during welding. Preheating and careful selection of welding processes and consumables are recommended.

Can 1215 steel be heat-treated?

1215 steel is not typically subjected to heat treatment as it is designed to be free-machining. The addition of sulfur in 1215 improves machinability but makes heat treatment less effective. The steel is often used in its as-rolled or as-drawn condition.

What is the difference between 1215 steel and 1144 steel?

1144 steel contains higher sulfur content than 1215, which provides better machinability but can result in lower ductility. 1144 steel undergoes stress relief annealing after machining, enhancing its mechanical properties and dimensional stability.

What is the difference between 1018 and 1215 steel?

1018 steel is a low-carbon steel known for its favorable weldability, forming, and machining characteristics. Meanwhile, 1215 steel, also low-carbon, is enhanced with added sulfur to improve machinability. However, this sulfur content diminishes its suitability for welding.