Low Carbon Steel General Info
The most affordable of all structural metals is low-carbon steel, usually referred to as mild steel. It is utilized extensively for a variety of purposes.
Strengths
Very low cost, superior to higher carbon steels in terms of toughness, machinability, formability, and weldability. Cold-working improves machinability and strength.
Limitations
Low strength and poor hardenability as compared to higher carbon steels.
Designation
The AISI/SAE designations for carbon steels are 10xx, 11xx, 12xx, and 15xx. Low carbon steels have carbon contents as indicated by the last two numbers, which can reach 30. The EN designations 1.03zz and 1.04zz apply to low carbon steels.
Common uses
Numerous applications, including the reinforcement of concrete, building sections, roofing sheets, vehicle body panels, and cans.
| Low Carbon steel, AISI 1020 annealed | Equivalent Grades |
|---|---|
| UNS number | G10200 |
| US name | ASTM MT1020, ASTM M1020, ASTM 1020, ASME G10200, ASME G10170, ASME 1017, ~SAE 040 X, Y, Z, ~SAE 035S, ~SAE 035C, ~SAE 035B, ~SAE 035A, ~SAE 035 X, Y, Z, ~ASTM A836, ~ASTM 1018 Class A, ~ASME G10210, ~ASME G10180, ~ASME 1021 |
| EN name | S240GP, ~P355NB, ~P310NB, ~HS15 |
| EN number | ~1.0021 |
| ISO name | ~E235 Quality A, ~CE20E4, ~CC21A |
| GB (Chinese) name | ~ML20Al, ~ML18Mn |
| JIS (Japanese) name | SWRM 20, SWRCH20A, SG 255, ~SWRCH18A, ~STKM12C, ~STKM12B, ~STKM12A, ~SPHT 2 |