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Seamless stainless steel pipe specification

Seamless Stainless Steel Tubes and Pipes

Stainless Steel Seamless Pipes Normal Standard
Item ASTM A213/A213M ASTM A312/A312M
Grade TP304 TP304L TP304 TP304L
TP316 TP316L TP316 TP316L
TP317 TP317L TP317 TP317L
TP347 TP310S TP347 TP310S
TP309H* TP310H* TP317* TP310H*
  TP321HΔ   TP321HΔ
Yield Strength σ0.2 (Mpa) ≥170; ≥205 ≥170; ≥205
Tensile Strength σb (Mpa) ≥485 ≥515 ≥485; ≥515
Elongation % ≥35 ≥35 ≥35 ≥35
Flattening Test H=1.09t/(0.09+t/D) H=1.09t/(0.09+t/D)
Flange Test 21-68% 　
Intergranular corrosion "*"﹑"Δ" ASTM E112 "Δ" min 7#, "*" min 6# "*"﹑"Δ"ASTM E112, min 6#
Hydraulic test(Mpa) D P max P=220.6t/D D P max ASTM A530/A530M
D≤270MM P=2Rt/D
R=50%σ0.2
<25.4 7 ≤88.9 17
25.4-<38.1 10
38.1-<50.8 14 >88.9 19
50.8-<76.2 17
76.2-<127 24
≥127 31
Metallograph Analysis STM A262 E ASTM A262 E
Non-Destructive Test ASTM E213 E309 E426 ASTM E213 E309 E426
Hardness HRB<90 RB<90
Chemical composition
Grade Chemical Composition
C (max) Si (max) Mn (max) P (max) S (max) Ni Cr
TP 304 0.08 0.75 2 0.04 0.03 8-11 18-20
TP 304H 0.04-0.10 0.75 2 0.04 0.03 8-11 18-20
TP 304L 0.035 0.75 2 0.04 0.03 8-13 18-20
TP 309S 0.08 0.75 2 0.04 0.03 8-13 18-20
TP 310S 0.08 0.75 2 0.045 0.03 12-15 22-24
TP 316 0.08 0.75 2 0.04 0.03 19-22 24-26
TP 316L 0.035 0.75 2 0.04 0.03 10-15 16-18
TP 316Ti 0.08 0.75 2 0.04 0.03 11-14 16-18
TP 317 0.08 0.75 2 0.04 0.03 11-14 16-18
TP 321 0.08 0.75 2 0.04 0.03 9-13 18-20
TP 321H 0.04-0.10 0.75 2 0.04 0.03 9-13 17-20
TP 347 0.08 0.75 2 0.04 0.03 9-13 17-20
TP 347H 0.04-0.10 0.75 2 0.04 0.03 9-13 17-20
Tolerance grade
Grade Outside diameter tolerance Grade Wall thickness tolerance
D1 ±1.50% but at least ±0.75mm T1 ±15% but at least ±0.60mm
D2 ±1.00% but at least ±0.50mm T2 ±12.5% but at least ±0.40mm
D3 ±0.75% but at least ±0.30mm T3 ±7.5% but at least ±0.15mm
D4 ±0.50% but at least ±0.10mm T4 ±5.0% but at least ±0.10mm
Tolerance standard
Item ASTM A213 ASTM A312 ASTM A269
O.D. tolerance O.D. tolerance O.D. tolerance
Outside diameter tolerance(mm) <25.4 ±0.10 10.3-48.3 +0.4/-0.8 12.7 < +0.13/-0.13
25.4-≤38.1 ±0.15 >48.3-114.3 +0.8/-0.8 12.7-38.1 +0.13/-0.13
>38.1-<50.8 ±0.20 >114.3-219.1 +1.6/-0.8 38.1-88.9 +0.25/-0.25
50.8-<63.5 ±0.25 >219.1-457.2 +2.4/-0.8 88.9-139.7 +0.38/-0.38
63.5-<76.2 ±0.30 >457.2-660.4 +3.2/-0.8 139.7-203.2 +0.76/-0.76
76.2-≤101.6 ±0.38 >660.4-864 +4/-0.8    
>101.6-≤190.5 ±0.38/-0.64 >864-1219.2 +4.8/-0.8    
>190.5-≤228.6 ±0.38/-1.14        
Thickness　
tolerance(mm)		 O.D. tolerance ±12.5%t O.D. tolerance
≤38.1 +20%t/0 ≤38.1 ±15%t
>38.1 +22%t/0 >38.1 ±10%t
The Test Requirements of Standards
Standard Chemical Composition Tensile Strength Yeild Point Tension Test Rockwell Hardness Flattening Test Flaring Test Hydrostatic
ASTM A312 X X X X   X    
ASTM A213 X X X X X X X X
ASTM A269 X       X      
ASTM A511 X X X X        
ASTM A789 X X X X        
Standard Ultrasonic Eddy Current Intergranular Corrosion Grain size α/γ Surface Quality Tolerance  
ASTM A312   X       X X  
ASTM A213   X       X X  
ASTM A269   X       X X  
ASTM A511           X X  
ASTM A789   X     X X X  
ASTM Mechanical Properties
Grade Tensile Strength Min(Mpa) Yeild Point Min(Mpa) EL. Min(%) Rockwell Max
TP 304 515 205 35 90
TP 304H 550 240 35 90
TP 304L 485 170 35 90
TP 309S 515 205 35 90
TP 310S 515 205 35 90
TP 316 515 205 35 90
TP 316L 485 170 35 90
TP 316Ti 515 205 35 90
TP 317 515 205 35 90
TP 321 515 205 35 90
TP 321H 515 205 35 90
TP 347 515 205 35 90
TP 347H 515 205 35 90
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