ASTM A312 Stainless Steel Pipe

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Apart from taking into consideration seamless pipes, the ASTM A312 specification also envelopes straight seam welded, as well as cold worked welded stainless steel grades belonging to the austenitic category. It is interesting to note that this particular specification also is an umbrella for low carbon versions of austenitic stainless steel grades such as 304L or 316L. This is because as opposed to the regular stainless steel grades, the lower carbon based Astm A312 Tp304l Stainless Steel Pipe tend to be a more efficient alloy with regards to its weldability properties. In fact, grade 304L does nothing to promote the formation of grain boundary precipitates in the heat affected weld zone of the ASTM A312M Welded Pipe.

Designed to be used in high temperature settings, the ASTM A312 Seamless Pipe is intended to be used for general corrosive service. Aside from undergoing several mechanical tests such as the transverse or longitudinal tension test and a flattening test, the ASTM A312-304 Pipe is also tested for weld decay. Furthermore, the grain size of the ASTM A312 Stainless Steel Pipe, ASTM A312 TP 316 alloy is determined as well. Not only this, but the specification also mentions that either a nondestructive electric test or a hydrostatic test is to be performed on each specimen of the SA 312 TP 304 pipes.

ASME SA 312 Pipes Sizes And Schedule Specifications

Size 1/4” OD to 24” OD, 1/8” NB to 24” NB
Finish No.1 Pickled Finish, No.4 finish, BA Finish, Electropolished Seamless Pipes
Length 6 meters
Delivery Condition Hot Finish, Cold Finish, Bright Annealed, Polished, Annealed and Pickled, Passivated, Stress Relived
Type Seamless Cold Drawn Tubes, Hot Finished Seamless Pipes, Welded Pipes, Fabricated Pipes
Thickness SCH 5/5S, 1 to 20mm, 10/10S, 40/40S, 20/20S, 80/80S, 160/160S, 120/120S as per ANSI B36.19/36.10
Grades TP304, TP304L, TP304H, TP321H, TP321, TP316, TP316L, TP316Ti, TP310S, TP347, TP347H

We supply all kinds of fine ASTM A312M Welded Pipe, Get ASTM A312-304 Pipe size, range and dimensions

ASTM A312 Seamless Pipe Other Diameter Tolerance

NPS Other Diameter Tolerance
+
inches milimeter inches milimeter
1/8~1 1 /2
> 1 1 /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

SS ASTM A312 Seamless Pipe Wall Thickness Tolerance %

NPS Wall Thickness Tolerance, %
+
1/8-2 1 /2 12.5 20.0
≥ 20, welded 12.5 17.5
3~18, t/D≤ 5% 12.5 22.5
≥ 20, seamless, t/D≤ 5% 12.5 22.5
3~18, t/D> 5% 12.5 15.0
≥ 20, seamless, t/D> 5% 12.5 15.0

ANSI B36.19 Stainless Steel Pipe Chemical Material Composition

Material Chemical Composition %
Sulfur  Carbon Silicon Manganese Nickel  Phosphorus  N B Nb Chrome Molybdenum  Ti
TP304 0.030 0.08 1.00 2.00 8.0-11.0 0.045 … . 18.0-20.0
TP304H 0.030 0.04-0.10 1.00 2.00 8.0-11.0 0.045 18.0-20.0
TP304L 0.030 0.035 D 1.00 2.00 8.0-13.0 0.045 18.0-20.0
TP310S 0.030 0.08 1.00 2.00 19.0-22.0 0.045 24.0-26.0 0.75
TP316 0.030 0.08 1.00 2.00 11.0-14.0 0.045 16.0-18.0 2.00-3.00
TP316L 0.030 0.035 1.00 2.00 10.0-14.0 0.045 16.0-18.0 2.00-3.00
TP316H 0.030 0.04-0.10 1.00 2.00 11.0-14.0 0.045 16.0-18.0 2.00-3.00
TP316Ti 0.030 0.08 0.75 2.00 10.0-14.0 0.045 0.10 16.0-18.0 2.00-3.00 5x(C+N)-0.70
TP321 0.030 0.08 1.00 2.00 9.0-12.0 0.045 0.10 17.0-19.0 5C-0.70
TP321H 0.030 0.04-0.10 1.00 2.00 9.0-12.0 0.045 17.0-19.0 4C-0.60
TP347 0.030 0.08 1.00 2.00 9.0-13.0 0.045 10xC-1.00 17.0-19.0
TP347H 0.030 0.04-0.10 1.00 2.00 9.0-13.0 0.045 8xC-1.00 17.0-19.0

SS ASTM A312 Welded Pipe Mechanical Characteristics

Material Tensile Strength
Ksi (MPa), Min.
Elongation %, Min Temperure
Min.
º F(º C)
Yield Strength
Ksi (MPa), Min.
TP304 75(515) 35 1900 (1040) 30(205)
TP304L 70(485) 35 1900 (1040) 25(170)
TP304H 75(515) 35 1900 (1040) 30(205)
TP310S 75(515) 35 1900 (1040) 30(205)
TP316 75(515) 35 1900(1040) 30(205)
TP316L 70(485) 35 1900(1040) 25(170)
TP316H 75(515) 35 1900(1040) 30(205)
TP316Ti 75(515) 35 1900(1040) 30(205)
TP321 75(515) 35 1900(1040) 30(205)
TP321H 75(515) 35 Cold: 2000
Hot: 1925
30(205)
TP347 75(515) 35 1900(1040) 30(205)
TP347H 75(515)   Cold: 2000
Hot: 1925
30