Nickel based corrosion alloy seamless tube

Usage:
      widely used in petrochemical industry and ocean exploitation such as heater, heat exchanger, evaporator, condensator and line pipe, etc.

Production standard:
      ASME SB163, ASME SB167, ASME SB407, ASME SB444, ASME SB622, ASME SB423, ASME SB829, etc.

Specification:
      Hot extrusion tube: OD 48mm – 325mm, WTK 4-40mm
      Cold rolling tube: OD 5.8mm – 508mm,  WTK 0.3 -35mm

Production condition:
      Hot extrusion
      Cold rolling
      Heat treatment

Chemical composition & performance of main grade
      ASTM UNS N02200, N02201, N04400, N08800, N08810, N08811, N06600, N06690, N08028, N06985, N08825, N06625, N10276

Room-temperature mechanical property
Grade   condition  Rm,min,MPa  Rp 0.2%,min,MPa  A50,min,%  Grain size
N02200  solution   379                     103                     40             --
N02201  solution    345                     83                     40              --
N04400  annealing  480                   195/170             35              --
N08800  solution    520                    205                    30              --
N08810  solution    450                    170                   30               5
N08811  solution    450                    170                   30               5
N06600  solution    550                    205/240            35/30        --
N06690  solution    586                   241                    30              --
N08028  solution    500                   214                    40              --
N06985  solution    621                   214                    40              --
N08825  solution    586                   241                   30               --
N06625  A/S          827/276               414/690         30/40         --
N10276  solution    283                  690                    40               --

High temperature mechanical property (all in solution condition)
Grade   mechanical     temperature℃
         Property          350℃   450℃  550℃   650℃  750℃    850℃
800H     Rm,MPa      485      490     480     420      270     149
             Rp0.2,MPa    162       165     169     155     125     95
             A4.52,%       52.5      56.0    52.5     50.0   69.5    101.5

825      Rm,MPa       560      550     527     485    345     197
            Rp0.2,MPa     205      195     191     169    170     176
            A4.52,%        47.5      51.5    49.0     52.5    64.0    92.0

625      Rm,MPa       685      657     637     610    480     345
            Rp0.2,MPa     255      242     225     210     225      215
            A4.52,%        67.5      63.5     65     96.5    114.0    117.0

Intergranular corrosion resistance
Intergranular corrosion resistance according GB/T15260-94(ferric sulfate-sulfuric acid method)  (all in SOLUTION & 120hour condition)
Grade          corrosion rate (mm/a)     corrosion depth (micron)
Alloy 800                0.42                  
alloy 800H               1.464
alloy 600                0.96
alloy 825                0.450                     ≤50
alloy 625                0.535                      ≤50


Intergranular corrosion resistance according GB15260-94 (65% HNO3)
 (all in SOLUTION condtion)
Grade            48h(1)  48h(2)  48h(3)  48h(4)  48h(5)    average corrosion rate (mm/a)
alloy 600         0.288   0.30     0.348   0.432    0.528            0.371
alloy 800H       0.204  0.12     0.168   0.252    1.02              0.248
alloy 825         0.348   0.204   0.24    0.192     0.321            0.264
alloy 625         0.556   0.454   0.489  0.466     0.471            0.489



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