Standard Carbon Steel Flanges (ASTM A105)
ASTM A105 is an ASTM specification dealing with forged carbon steel piping components.
|Composition, %||0.35 max||0.60-1.05||0.035 max||0.040 max||0.10-0.35||0.40 max (1)||0.40 max (1)||0.30 max (1-2)||0.12 max (1-2)||0.08 max|
(1) The sum of copper, nickel, chromium, molybdenum and vanadium shall not exceed 1.00%.
(2) The sum of chromium and molybdenum shall not exceed 0.32%.
For each reduction of 0.01% below the specified carbon maximum (0.35%), an increase of 0.06% manganese above the specified maximum (1.05%) will be permitted up to a maximum of 1.35%.
Flange Manufacturing Considerations
Heat treatment is not mandatory requirement except:
- Flanges above Class 300
- Flanges of special design where the design pressure at the design temperature exceeds the rating of Class 300.
- Flanges of special design where the design pressure or design temperature are not known.