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Standard: ASTM A312/A358 ANSI B36.19M Material: 304, 304L,304H,310S, 316, 316L,316H,316Ti,321,321H,347,347H OD:1/4"~30" WT: SCH-5S, SCH-10S, SCH-40S WELDING METHOD: TIG or TIG + Plasma Inspection items: Chemical Composition; Size; Mechanical Properties; Flattening Test; Hydrostatic Test or Eddy current test or Ultrasonic test; Surface quality Negotiated items: Erosion test; Intercrystalline corrosion; Stabilization heat treatment Application: Used in Pipeline for transporting corrosive fluid in chemical & petrochemical industries. |
SizeTolerance NPS ASTM A312 OD Tolerance + - inch mm inch mm 1/8～11/2 > 11/2～4 > 4～8 > 8～18 > 18～26 > 26～34 > 34～48 1/64（0.015） 1/32(0.031) 1/16(0.062) 3/32(0.093) 1/8(0.125) 5/32(0.156) 3/16(0.187) 0.4 0.8 1.6 2.4 3.2 4.0 4.8 1/32(0.031) 1/32(0.031) 1/32(0.031) 1/32(0.031) 1/32(0.031) 1/32(0.031) 1/32(0.031) 0.8 0.8 0.8 0.8 0.8 0.8 0.8 NPS ASTM A312 WT Tolerance，% + - 1/8-2 1/2 20.0 12.5 3~18，t/D≤5% 22.5 12.5 3~18，t/D>5% 15.0 12.5 ≥20, welded 17.5 12.5 ≥20, seamless，t/D≤5% 22.5 12.5 ≥20，seamless，t/D>5% 15.0 12.5 Chemical Composition Material ASTM A312 Chemical Composition % Max C Mn P S Si Cr Ni Mo NB Nb Ti TP304 0.08 2.00 0.045 0.030 1.00 18.0-20.0 8.0-11.0 … … …. … TP304H 0.04-0.10 2.00 0.045 0.030 1.00 18.0-20.0 8.0-11.0 … … … … TP 0.035D 2.00 0.045 0.030 1.00 18.0-20.0 8.0-13.0 … … … … TP310S 0.08 2.00 0.045 0.030 1.00 24.0-26.0 19.0-22.0 0.75 TP316 0.08 2.00 0.045 0.030 1.00 16.0-18.0 11.0-14.0 2.00-3.00 … … … TP 0.035 2.00 0.045 0.030 1.00 16.0-18.0 10.0-14.0 2.00-3.00 … … … TP316H 0.04-0.10 2.00 0.045 0.030 1.00 16.0-18.0 11.0-14.0 2.00-3.00 … … … TP316Ti 0.08 2.00 0.045 0.030 0.75 16.0-18.0 10.0-14.0 2.00-3.00 0.10 … 5x(C+N)-0.70 TP321 0.08 2.00 0.045 0.030 1.00 17.0-19.0 9.0-12.0 … 0.10 … TP321H 0.04-0.10 2.00 0.045 0.030 1.00 17.0-19.0 9.0-12.0 … … … TP347 0.08 2.00 0.045 0.030 1.00 17.0-19.0 9.0-13.0 10xC-1.00 … TP347H 0.04-0.10 2.00 0.045 0.030 1.00 17.0-19.0 9.0-13.0 … … 8xC-1.00 … Mechanical Properties ASTM A312 Mechanical Properties Material Heat Treatment Temperure Min. ℉(℃) Tensile Strength Ksi (MPa), Min. Yield Strength Ksi (MPa), Min. Elongation %, Min TP304 Solution 1900 (1040) 75(515) 30(205) 35 TP Solution 1900 (1040) 70(485) 25(170) 35 TP304H Solution 1900 (1040) 75(515) 30(205) 35 TP310S Solution 1900 (1040) 75(515) 30(205) 35 TP316 Solution 1900(1040) 75(515) 30(205) 35 TP Solution 1900(1040) 70(485) 25(170) 35 TP316H Solution 1900(1040) 75(515) 30(205) 35 TP316Ti Solution 1900(1040) 75(515) 30(205) 35 TP321 Solution 1900(1040) 75(515) 30(205) 35 TP321H Solution Cold: 2000(1100) Hot:1925(1050) 75(515) 30(205) 35 TP347 Solution 1900(1040) 75(515) 30(205) 35 TP347H Solution Cold: 2000(1100) Hot: 1925(1050) 75(515) 30(205) 35