1055 AISI, ASTM, UNS Worldwide Equivalent Grades
1055 is categorized as a carbon steel bar.
- UNS G10550 is the unified numbering system designation for AISI 1055 carbon steel.
- Worldwide equivalent grades for AISI 1055 include DIN 1.1203, EN C55E, JIS S55C, AFNOR XC55, BS 070M55, UNI C55, and GOST 55.
Note: The aforementioned equivalent grades may vary depending on the country and standard used. It is advisable to consult the appropriate standard or specification before using these grades.
AISI 1055 Composition
| Element | Content (%) |
|---|---|
| Iron, Fe | 98.41-98.9 |
| Manganese, Mn | 0.60-0.90 |
| Carbon, C | 0.50-0.60 |
| Sulfur, S | ≤ 0.050 |
| Phosphorous, P | ≤ 0.040 |
AISI 1055 Mechanical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength, ultimate | 660 MPa | 95700 psi |
| Tensile strength, yield | 560 MPa | 81200 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) | 10% | 10% |
| Reduction of area | 40% | 40% |
| Hardness, Brinell | 197 | 197 |
| Hardness, Knoop (converted from Brinell hardness) | 219 | 219 |
| Hardness, Rockwell B (converted from Brinell hardness) | 92 | 92 |
| Hardness, Rockwell C (converted from Brinell hardness. Value below normal HRC range, for comparison purposes only) | 13 | 13 |
| Hardness, Vickers (converted from Brinell hardness) | 207 | 207 |
| Machinability (based on AISI 1212 steel. as 100 machinability) | 55 | 55 |
AISI 1055 Physical Properties
| Properties | Metric | Imperial |
|---|---|---|
| Density | 7.85 g/cm3 | 0.284 lb/in3 |
AISI 1055 Thermal Properties
| Properties | Metric | Imperial |
|---|---|---|
| Thermal expansion co-efficient | 11 µm/m°C | 6.11 µin/in°F |
| Thermal conductivity | 49.8 W/mK | 346 BTU in/hr.ft2.°F |
AISI 1055 Equivalent
Din 1.0535
Jis s55c
Gb 55 Gb
AISI 1055 Uses
Automotive industry
Construction industry
Sports equipment
Agricultural equipment
Military equipment
Medical instruments
Aerospace industry
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