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ASTM A403 WP 321 Stainless Steel Buttweld Pipe Fittings

ASTM A403 WP 321 Stainless Steel Fittings

ASTM A403 WP321 Material Specification

Standards Specification Of : ASTM A403 WP 321 Stainless Steel Fittings
Schedule: Sch 5 TO Sch XXS.
Size: Wall Thickness – from 2 to 40 mm.
Diameters – from 21,3 to 711 mm.
Materials List: Nickel, Alloy Steel, Titanium, Tantalum, Stainless Steel, Carbon Steel, Inconel, Monel, Hastalloy, Cupro-Nickel 90/10 & 70/30
Type Of Fittings: Butt Weld (BW)
Thickness: Schedule 5S, 20S, S10, S20, S30, 10S, S80, S100, S120, STD, 40S, S40, S60, XS, 80S, S140, S160, XXS and etc.
Standards Dimension: ANSI B16.28, MSS-SP-43 Type A, JIS B2312, ANSI B16.9, MSS-SP-43 Type B, JIS B2313


ANSI B16.9 A403 gr WP321 Elbow Equivalent

STANDARD WERKSTOFF NR. UNS JIS EN
SS 321 Fittings 1.4541 S32100 SUS 321 X6CrNiTi18-10
SS 321H Fittings 1.4878 S32109 SUS 321H X12CrNiTi18-9


ASTM A403 WP321 Fittings Chemical Chart

Grade C Mn Si P S Cr N Ni Ti
SS 321 0.08 max 2.0 max 1.0 max 0.045 max 0.030 max 17.00 - 19.00 0.10 max 9.00 - 12.00 5(C+N) – 0.70 max
SS 321H 0.04 – 0.10 2.0 max 1.0 max 0.045 max 0.030 max 17.00 - 19.00 0.10 max 9.00 – 12.00 4(C+N) – 0.70 max


MSS SP-79 321H Fittings Mechanical Chart

Density Melting Point Tensile Strength Yield Strength (0.2%Offset) Elongation
7.9 g/cm3 1400 °C (2550 °F) Psi – 75000 , MPa – 515 Psi – 30000 , MPa – 205 35 %