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Mild Steel Round Bar Product Description
1215 round bar stock steel is an environmentally friendly material. Compared with 12L14 round steel rod, it does not contain lead or harmful substances to the environment. It has good machinability. It is suitable for general electroplating shafts, cutting materials and general parts.
1215 steel rod bar Due to its accurate accuracy and good surface condition, free-cutting steel products can be used directly, such as spraying, sanding, bending, and drilling.
1215 free-cutting steel is mainly used to manufacture parts with high dimensional accuracy and high surface finish but low mechanical performance requirements, such as gears, shafts, bolts, valves, bushings, pins, pipe fittings, spring seats, etc. Machine screws, plastic molds, surgical and dental instruments, certain automotive parts, instruments, etc.
carbon steel round bar

Mild Steel Round Product Details
AISI 1215 Carbon Steel Chemical Composition:
Element |
Content (%) |
|---|---|
Iron, Fe |
98.42 – 98.95 |
Manganese, Mn |
0.75 – 1.05 |
Sulfur, S |
0.260 – 0.35 |
Carbon, C |
0.090 |
Phosphorous, P |
0.040 – 0.090 |
AISI 1215 Carbon Steel Rod Stock Physical Properties:
Properties |
Metric |
Imperial |
|---|---|---|
Density |
7.87 g/cm3 |
0.284 lb/in³ |
AISI 1215 Carbon Steel Round Mechanical Properties:
Properties |
Metric |
Imperial |
|---|---|---|
Tensile strength |
540 MPa |
78300 psi |
Yield strength |
415 MPa |
60200 psi |
Bulk modulus (typical for steel) |
140 GPa |
20300 ksi |
Shear modulus (typical for steel) |
80.0 GPa |
11600 ksi |
Elastic modulus |
190-210 GPa |
27557-30458 ksi |
Poisson's ratio |
0.27-0.30 |
0.27-0.30 |
Elongation at break |
10% |
10% |
Reduction of area |
35% |
35% |
Hardness, Brinell |
167 |
167 |
Hardness, Knoop (converted from Brinell NMness) |
188 |
188 |
Hardness, Rockwell B (converted from Brinell NMness) |
85 |
85 |
Hardness, Vickers (converted from Brinell NMness) |
175 |
175 |
Machinability (Based on 100 machinability for AISI 1212 steel.) |
140 |
140 |
AISI 1215 Carbon Round Bar Thermal Properties:
Properties |
Metric |
Imperial |
|---|---|---|
Thermal expansion co-efficient (@ 20°C/68°F, typical steel) |
11.5 µm/m°C |
6.39 µin/in°F |
Thermal conductivity (typical steel) |
51.9 W/mK |
360 BTU in/hr.ft².°F |
mild steel round stock

Gnee Group Introduction And Customer Visits
In its many years of operation, GNEE has won recognition from users with its fast, efficient and complete after-sales service. While giving full play to our own advantages, we learn from the experiences of successful companies, constantly improve ourselves, rationally adjust our business strategies, and strive to adapt to the market.
We will adhere to the tenet of quality first and reputation first, and serve the society with high level, high quality and high standard. We will rely on complete modern enterprise management and quality systems and advanced quality inspection methods to strive to build an "excellent" brand and provide the best quality products and services to new and old customers at home and abroad!
carbon round bar

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