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ASTM specifications for weld fittings and flanges. Grade & composition symbols for carbon weld fittings.

Material Specifications for Carbon Steel BUTT WELDING FITTINGS ASTM SPECIFICATION A234

GRADE SYMBOL TYPE OF STEEL CHEMICAL COMPOSITION MINIMUM PHYSICAL REQUIREMENTS HEAT TREATMENT WPA (Grade A) WPB (Grade B) GRADE SYMBOL TYPE OF STEEL

Material Specifications for Carbon Steel FLANGES ASTM SPECIFICATION* A181 A105

I II I II

Carbon

Carbon

Carbon

Carbon

C-0.25 max. TS-48,000 YP-30,000 Cooled in Still Air

C-0.30 max. TS-60,000 YP-35,000 Cooled in Still Air CHEMICAL COMPOSITION C-0.35 max. C-0.35 max.

MINIMUM PHYSICAL TS-60,000 TS-70,000 TS-60,000 TS-70,000 REQUIRE- YP-30,000 YP-36,000 YP-30,000 YP-36,000 MENTS Hot forged with HEAT TREATMENT finishing temp. above upper critical Cooled in still air *Material specifications for the ASME Boiler Code are the same as ASTM except the letter S is prefixed thereto. A 35% Carbon maximum for flanges which are to be welded has been established by ASTM A181 and A105. Normalized

GRADE AND COMPOSITION SYMBOLS FOR CARBON STEEL BUTTWELDING FITTINGS

Seamless Pipe.............. Plate........................... Forgings...................... Bars*.......................... Seamless Pipe................ Plate............................. Forgings........................ Bars*............................ Seamless Pipe................ Plate............................ Forgings........................ ASTM A106 Grade A ASTM A285 Grade C ASTM A105 Grade 1 ASTM A107 GR. 1008-1022 ASTM A106 Grade B ASTM A515 Grade 6S ASTM A105 Grade 11 ASTM A107 Gr. 1025-1030 ASTM A106 Grade C ASTM A104 Grade 11'

WPA

WPB

WPC

* For fittings 2" nominal size and smaller Low Temperature Carbon Steel Seamless and Welded Pipe. WPLO Plate............................. Forgings...................

ASTM A332 Grade O ASTM A300 Class 1 ASTM A350 Grade LF1

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