A312 304/304L Welded Stainless Steel Pipe

Dongshang Stainless produce seamless and welded stainless steel pipe complying with ASTM A312 specification, intending for high-temperature and general corrosive service, custom stainless steel grade 304/304L, and also other grades, size range as ANSI B36.10, ANSI B36.19.

Basic specification
  • OD: 1/8″ – 24″
  • Wth: Sch 5, Sch 5s, Sch 10, Sch 10s, Sch 20, Sch 30, Sch 40s, Sch 40, Sch STD, Sch 60, Sch 80s, Sch 100, Sch 120, Sch XS, Sch XXS, Sch 160
  • Length: max 22000 mm
  • Ends: plain ends, bevelled ends
  • Specification:ASTM A312, ASTM A312M
  • Grades: 304/340L, 316/316L, 321, 310S, 904L, S31803
  • Finishing: bright annealing, as welded, annealing, polishing.
  • Form: round

ASTM A312 welded stainless steel pipe tolerance

OD tolerance WTH(mm)
10.3-48.3 +0.40/-0.80 +/-12.5%t
>48.3-114.3 +0.80/-0.08
>114.3-219.1 +1.60/-0.80
>219.1-457.2 +2.40-0.80
>457.2-660.4 +3.20/-0.80
>660.4-864 +4.00/-0.08
>864-1219.2 +4.80/-0.08
  • 316L stainless steel welded pipe
  • A312 304 304L Welded Stainless Steel Pipe
  • A312 seamless stainless steel pipe

A312 Stainless steel grades

Grades Chemical composition % by mass max unless stated
UNS No SAE No AISI No. C Si Mn P S Cr Mo Ni Others
S30100 30301 301 0.15 1.00 2.00 0.045 0.030 16.0/18.0 6.0/8.0 N 0.10
S30103 301L 0.03 1.00 2.00 0.045 0.030 16.0/18.0 6.0/8.0 N 0.20
S30153 301LN 0.03 1.00 2.00 0.045 0.030 16.0/18.0 6.0/8.0 N 0.07/0.20
S30200 30302 302 0.15 0.75 2.00 0.045 0.030 17.0/19.0 8.0/10.0 N 0.10
S30215 30302B 302B 0.15 2.00/ 3.00 2.00 0.045 0.030 17.0/19.0 8.0/10.0
S30300 30303 303 0.15 1.00 2.00 0.20 0.15 min 17.0/19.0 8.0/10.0
S30310 XM-5 (303Plus x) 0.15 1.00 2.50/4.50 0.20 0.25 min 17.00/19.00 7.00/9.00
S30323 30303Se 303Se 0.15 1.00 2.00 0.20 0.060 17.0/19.0 8.0/10.0 Se 0.15 min
S30330 303Cu 0.15 1.00 2.00 0.15 0.10 min 17.0/19.0 6.0/10.0 Cu 2.5/4.0; Se 0.10
S30400 30304 304 0.07 0.75 2.00 0.045 0.030 17.5/19.5 8.0/10.5 N 0.10
S30400 A276 for bar 30304 304 0.08 1.00 2.00 0.045 0.030 18.0/20.0 8.0/11.0
S30403 30304L 304L 0.030 0.75 2.00 0.045 0.030 17.5/19.5 8.0/12.0 N 0.10
S30403 A276 for bar 30304L 304L 0.030 1.00 2.00 0.045 0.030 18.0/20.0 8.0/12.0
S30430 302HQ 0.03 1.00 2.00 0.045 0.030 17.0/19.0 8.0/10.0 Cu 3.0/4.0
S30452 XM-21 (304HN) 0.08 1.00 2.00 0.045 0.030 18.0/20.0 8.00/10.00 N 0.16/0.30
S30453 304LN 0.030 0.75 2.00 0.045 0.030 18.0/20.0 8.0/12.0 N 0.10/0.16
S30454 0.03 1.00 2.00 0.045 0.030 18.0/20.0 8.0/11.0 N 0.16/0.30
S30500 30305 305 0.12 0.75 2.00 0.045 0.030 17.0/19.0 10.5/13.0
S30800 30308 308 0.08 1.00 2.00 0.045 0.030 19.0/21.0 10.0/12.0
S31600 30316 316 0.08 0.75 2.00 0.045 0.030 16.0/18.0 2.00/3.00 10.0/14.0 N 0.10
S31603 30316L 316L 0.030 0.75 2.00 0.045 0.030 16.0/18.0 2.00/3.00 10.0/14.0 N 0.10
S31635 316Ti 0.08 0.75 2.00 0.045 0.030 16.0/18.0 2.00/3.00 10.0/14.0 Ti 5x (C+N) / 0.70 N 0.10
S31640 316Cb 0.08 0.75 2.00 0.045 0.030 16.0/18.0 2.00/3.00 10.0/14.0 Nb 10x C / 1.10 N 0.10
S31653 316LN 0.030 0.75 2.00 0.045 0.030 16.0/18.0 2.00/3.00 10.0/14.0 N 0.10/0.16
S31700 30317 317 0.08 0.75 2.00 0.045 0.030 18.0/20.0 3.0/4.0 11.0/15.0 N 0.10
S31703 317L 0.030 0.75 2.00 0.045 0.030 18.0/20.0 3.00/4.00 11.0/15.0 N 0.10
S31725 317LM 0.030 0.75 2.00 0.045 0.030 18.0/20.0 4.0/5.0 13.5/17.5 N 0.20
S31726 317LMN 0.030 0.75 2.00 0.045 0.030 17.0/20.0 4.0/5.0 13.5/17.5 N 0.10/0.20
S31753 317LN 0.030 0.75 2.00 0.045 0.030 18.0/20.0 3.0/4.0 11.0/15.0 N 0.10/0.22
S32100 30321 321 0.08 0.75 2.00 0.045 0.030 17.0/19.0 9.0/12.0 Ti 5 x C min/0.70 N 0.10
S34700 30347 347 0.08 0.75 2.00 0.045 0.030 17.0/19.0 9.0/13.0 Nb+Ta 10 x C min/1.0
S34720 347F 0.08 1.00 2.00 0.040 0.18/0.35 17.00/19.00 0.75 9.00/12.00 Nb 10xC / 1.10; Cu 0.75; Ta 0.05
S34723 347FSe 0.08 1.00 2.00 0.11/0.17 0.030 17.00/19.00 0.75 9.00/12.00 Nb 10xC / 1.10; Cu 0.75; Se 0.15/0.35; Ta 0.05
S34800 30348 348 0.08 0.75 2.00 0.045 0.030 17.0/19.0 9.00/13.0 Nb+Ta 10 x C / 1.00; Ta:0.10 max; Co 0.20
S38400 30384 384 0.04 1.00 2.00 0.045 0.030 15.0/17.0 17.0/19.0

testing and inspection for welded stainless steel pipe:

  • Mechanical Tests
  • Grain Size Determinations
  • Weld Decay Tests
  • Transverse or Longitudinal Tension Test
  • Flattening Test
  • Grain Size
  • Hydrostatic or Nondestructive Electric Test
  • Flattening Test(option)
  • Radiographic Examination(option)
  • Intergranular Corrosion Test(option)
ASTM A312 covers seamless, straight-seam welded, and heavily cold worked welded stainless steel pipe, when larger diameter welded pipes, welding two longitudinal sections is allowed.