A105 is the American ASTM standard number, ASTMA105/A105M elbow, A represents ordinary carbon structural steel. It belongs to special steel and is a kind of cold forged steel. A105 is a mild steel elbow, similar to 20 steel.
ASTM A105 seamless elbow is usually used in pipeline systems under high temperature and high pressure, such as oil, natural gas, chemical industry and other fields. Its size and pressure level can be selected according to actual needs. Common sizes range from 1/2 inch to 48 inches, and pressure levels range from 150LB to 2500LB.
ASTM A105 90 degree elbow chemical composition:
C:≤0.35 Si:≤0.35 Mn:0.6-1.05 S:≤0.050 P:≤0.040, Cu≤0.4 Ni≤0.4 Mo≤0.12 V≤0.08 Cr≤0.3
ASTM A105 Stamping elbow Mechanical properties:
Tensile strength: (σb) ≥485Mpa
Yield strength (σs) ≥250Mpa
Back elongation (δ) ≥22%
Area shrinkage (ψ) ≥30%
Hardness≤HB187
Note: In the pipeline system, generally A105 can replace No. 20, but No. 20 cannot completely replace A105 because the strength difference is still large. However, A105 is slightly less resistant to stress corrosion cracking (SCC) than No. 20.
ASME SA105 Carbon Steel 45 Deg Elbow Tolerance
| Dimensions | Up to 2" NB | 2 1/2" & 3" NB | |
| • Socket Bore | + 0.25 | + 0.38 | |
| - 0.00 | - 0.00 | ||
| • Body Bore | + 0.00 | + 0.00 | |
| - 1.52 | - 3.00 | ||
| A | 1/4" NB | ± 0.8 | ± 2.50 |
| 3/8" TO 3/4" NB | ± 1.6 | ||
| 1"T0 2"NB | ± 2.0 | ||
ASTM A105 Carbon Steel Threaded Elbow
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