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Silver Tubes is one of the pioneer manufacturing houses and suppliers of Alloy 28 Tubes, which is originally developed for its use in the manufacture of phosphoric acid. Alloy 28 Tubes is especially used for heat exchangers in the concentration unit, where corrosive conditions are worst. Alloy 28 Seamless Tubes has superior resistance to creep rupture compared to Alloy 800. Alloy 28 Welded Tubes has the same chemical makeup but differences in carbon, aluminium and titanium quantities. Phosphoric acid, manufactured by the wet method, contains varying impurities derived from Alloy 28 EFW Tubes. The higher strength of Alloy 28 Seamless Tubes results from close control of carbon, aluminium and titanium contents in conjunction with a high temp anneal. Alloy 28 ERW Tubes is nickel-iron-chromium alloys with good strength and excellent resistance to oxidation and carburization in high-temperature exposure.
Alloy 28 Welded Tubes has further modifications to the combined titanium and aluminium levels (0.85 to 1.2 %) to ensure optimum high-temperature properties. Alloy 28 ERW Tubes offer good resistance in a variety of acidic and sulfur-containing media. The blend of mechanical and thermal processing enables Alloy 28 EFW Tubes to tolerate higher stresses than traditional alloys. Laboratory tests carried out in wet-process phosphoric acid have shown that UNS N08028 Tubes is far more resistant to impurities of this kind than other high alloy materials. We also offer these tubes at a reasonable price to our clients.
Alloy 28 Seamless Tubes | ASTM B668; EN 10216-5; SEW 400 (Feb 1991); SS 14 25 84; NFA 49-217 |
Tubing Size | 1/8″NB TO 30″NB IN |
Type | Seamless / Welded / ERW |
Thickness | 0.8mm to 6mm For Tubes |
OD for Alloy 28 Tubes | 1/2″ NB – 300″ NB |
OD for Alloy 28 ERW Tube | 1/2″ NB – 600″ NB |
OD for Alloy 28 EFW Tube | 6″ NB – 300″ NB |
Form | Round Tubes, Square Tubes, Rectangular Tubes |
STANDARD | UNS | WERKSTOFF NR. | EN |
Alloy 28® | N08028 | 1.4563 | X1NiCrMoCuN31-27-4 |
Grade | C % | Si ≤ % | Mn ≤ % | P ≤ % | S ≤ % | Cr % | Mo % | Ni % | N % | Cu % |
Alloy 28 | ≤ 0.02 | 0.70 | 2.00 | 0.03 | 0.01 | 26.0-28.0 | 3.00-4.00 | 30.0-32.0 | ≤ 0.11 | 0.70-1.50 |
Tensile strength Rm N/mm² |
0.2% Yield strength Rp ≥ N/mm² |
Elongation A5 ≥ % |
Hardness HB 30 ≤ HB |
Modulus of elasticity kN/mm² |
500-750 | 220 | 35/30 | 230 | 195 |
Alloy28 SUS-310 SS Seamless Steel Annealed Pickled Pipes | $1550-12000 / Metric Ton (FOB Price) |
UNS N08028 /Alloy 28/Din 1.4563/Alloy28 Manufacturer | $1550-12000 / Metric Ton (FOB Price) |
Round Bars Alloy 28 | $960-2200 / Ton (FOB Price) |
Alloy 28 Stainless Steel | $600-12000 / Ton (FOB Price) |
UNS N08028 /Alloy 28/Din 1.4563/Alloy28 Annealed Pickled Pipes | $1550-12000 / Metric Ton (FOB Price) |
Super Alloy N08028 (Sanicro28/1.4563)/316 Stainless Steel Sheet | $200-20000 / Ton (FOB Price) |
UNS N08028 / 1.4563 / Nimofer 3127 Stainless Steel | $600-12000 / Ton (FOB Price) |
UNS N08028 Stainless Steel | $600-12000 / Ton (FOB Price) |
UNS N08028 ALLOY 28 Tubes (O.D.) |
ASTM B668 UNS N08028 Tube Gauge | |||||||||||||||||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
BWG 00 | BWG 0 | BWG 1 | BWG 2 | BWG 3 | BWG 4 | BWG 5 | BWG 6 | BWG 7 | BWG 8 | BWG 9 | BWG 10 | BWG 11 | BWG 12 | BWG 13 | BWG 14 | BWG 15 | BWG 16 | BWG 17 | BWG 18 | BWG 19 | BWG 20 | BWG 21 | BWG 22 | BWG 23 | BWG 24 | |
ASTM B668 Alloy 28 Tubing Wall Thickness (Inches) | ||||||||||||||||||||||||||
0.380 | 0.340 | 0.300 | 0.284 | 0.259 | 0.238 | 0.220 | 0.203 | 0.180 | 0.165 | 0.148 | 0.134 | 0.120 | 0.109 | 0.095 | 0.083 | 0.072 | 0.065 | 0.058 | 0.049 | 0.042 | 0.035 | 0.032 | 0.028 | 0.025 | 0.022 | |
ALLOY UNS N08028 Tubes Inside Dia | ||||||||||||||||||||||||||
1/4" | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.010 | 0.032 | 0.060 | 0.084 | 0.106 | 0.120 | 0.134 | 0.152 | 0.166 | 0.180 | 0.186 | 0.194 | 0.200 | 0.206 |
3/8" | N/A | N/A | N/A | N/A | N/A | N/A | N/A | N/A | 0.015 | 0.045 | 0.079 | 0.107 | 0.135 | 0.157 | 0.185 | 0.209 | 0.231 | 0.245 | 0.259 | 0.277 | 0.291 | 0.305 | 0.311 | 0.319 | 0.325 | 0.331 |
1/2" | N/A | N/A | N/A | N/A | N/A | 0.024 | 0.060 | 0.094 | 0.140 | 0.170 | 0.204 | 0.232 | 0.260 | 0.282 | 0.310 | 0.334 | 0.356 | 0.370 | 0.384 | 0.402 | 0.416 | 0.430 | 0.436 | 0.444 | 0.450 | 0.456 |
5/8" | N/A | N/A | 0.025 | 0.057 | 0.107 | 0.149 | 0.185 | 0.219 | 0.265 | 0.295 | 0.329 | 0.357 | 0.385 | 0.407 | 0.435 | 0.459 | 0.481 | 0.495 | 0.509 | 0.527 | 0.541 | 0.555 | 0.561 | 0.569 | 0.575 | 0.581 |
3/4" | N/A | 0.070 | 0.150 | 0.182 | 0.232 | 0.274 | 0.310 | 0.344 | 0.390 | 0.420 | 0.454 | 0.482 | 0.510 | 0.532 | 0.560 | 0.584 | 0.606 | 0.620 | 0.634 | 0.652 | 0.666 | 0.680 | 0.686 | 0.694 | 0.700 | 0.706 |
7/8" | 0.115 | 0.195 | 0.275 | 0.307 | 0.357 | 0.399 | 0.435 | 0.469 | 0.515 | 0.545 | 0.579 | 0.607 | 0.635 | 0.657 | 0.685 | 0.709 | 0.731 | 0.745 | 0.759 | 0.777 | 0.791 | 0.805 | 0.811 | 0.819 | 0.825 | 0.831 |
1" | 0.240 | 0.320 | 0.400 | 0.432 | 0.482 | 0.524 | 0.560 | 0.594 | 0.640 | 0.670 | 0.704 | 0.732 | 0.760 | 0.782 | 0.810 | 0.834 | 0.856 | 0.870 | 0.884 | 0.902 | 0.916 | 0.930 | 0.936 | 0.944 | 0.950 | 0.956 |
1 1/8" | 0.365 | 0.445 | 0.525 | 0.557 | 0.607 | 0.649 | 0.685 | 0.719 | 0.765 | 0.795 | 0.829 | 0.857 | 0.885 | 0.907 | 0.935 | 0.959 | 0.981 | 0.995 | 1.009 | 1.027 | 1.041 | 1.055 | 1.061 | 1.069 | 1.075 | 1.081 |
1 1/4" | 0.490 | 0.570 | 0.650 | 0.682 | 0.732 | 0.774 | 0.810 | 0.844 | 0.890 | 0.920 | 0.954 | 0.982 | 1.010 | 1.032 | 1.060 | 1.084 | 1.106 | 1.120 | 1.134 | 1.152 | 1.166 | 1.180 | 1.186 | 1.194 | 1.200 | 1.206 |
1 1/2" | 0.740 | 0.820 | 0.900 | 0.932 | 0.982 | 1.024 | 1.060 | 1.094 | 1.140 | 1.170 | 1.204 | 1.232 | 1.260 | 1.282 | 1.310 | 1.334 | 1.356 | 1.370 | 1.384 | 1.402 | 1.416 | 1.430 | 1.436 | 1.444 | 1.450 | 1.456 |
1 3/4" | 0.990 | 1.070 | 1.150 | 1.182 | 1.232 | 1.274 | 1.310 | 1.344 | 1.390 | 1.420 | 1.454 | 1.482 | 1.510 | 1.532 | 1.560 | 1.584 | 1.606 | 1.620 | 1.634 | 1.652 | 1.666 | 1.680 | 1.686 | 1.694 | 1.700 | 1.706 |
2" | 1.240 | 1.320 | 1.400 | 1.432 | 1.482 | 1.524 | 1.560 | 1.594 | 1.640 | 1.670 | 1.704 | 1.732 | 1.760 | 1.782 | 1.810 | 1.834 | 1.856 | 1.870 | 1.884 | 1.902 | 1.916 | 1.930 | 1.936 | 1.944 | 1.950 | 1.956 |
2 1/4" | 1.490 | 1.570 | 1.650 | 1.682 | 1.732 | 1.774 | 1.810 | 1.844 | 1.890 | 1.920 | 1.954 | 1.982 | 2.010 | 2.032 | 2.060 | 2.084 | 2.106 | 2.120 | 2.134 | 2.152 | 2.166 | 2.180 | 2.186 | 2.194 | 2.200 | 2.206 |
2 1/2" | 1.740 | 1.820 | 1.900 | 1.932 | 1.982 | 2.024 | 2.060 | 2.094 | 2.140 | 2.170 | 2.204 | 2.232 | 2.260 | 2.282 | 2.310 | 2.334 | 2.356 | 2.370 | 2.384 | 2.402 | 2.416 | 2.430 | 2.436 | 2.444 | 2.450 | 2.456 |
2 3/4" | 1.990 | 2.070 | 2.150 | 2.182 | 2.232 | 2.274 | 2.310 | 2.344 | 2.390 | 2.420 | 2.454 | 2.482 | 2.510 | 2.532 | 2.560 | 2.584 | 2.606 | 2.620 | 2.634 | 2.652 | 2.666 | 2.680 | 2.686 | 2.694 | 2.700 | 2.706 |
3" | 2.240 | 2.320 | 2.400 | 2.432 | 2.482 | 2.524 | 2.560 | 2.594 | 2.640 | 2.670 | 2.704 | 2.732 | 2.760 | 2.782 | 2.810 | 2.834 | 2.856 | 2.870 | 2.884 | 2.902 | 2.916 | 2.930 | 2.936 | 2.944 | 2.950 | 2.956 |
3 1/4" | 2.490 | 2.570 | 2.650 | 2.682 | 2.732 | 2.774 | 2.810 | 2.844 | 2.890 | 2.920 | 2.954 | 2.982 | 3.010 | 3.032 | 3.060 | 3.084 | 3.106 | 3.120 | 3.134 | 3.152 | 3.166 | 3.180 | 3.186 | 3.194 | 3.200 | 3.206 |
3 1/2" | 2.740 | 2.820 | 2.900 | 2.932 | 2.982 | 3.024 | 3.060 | 3.094 | 3.140 | 3.170 | 3.204 | 3.232 | 3.260 | 3.282 | 3.310 | 3.334 | 3.356 | 3.370 | 3.384 | 3.402 | 3.416 | 3.430 | 3.436 | 3.444 | 3.450 | 3.456 |
3 3/4" | 2.990 | 3.070 | 3.150 | 3.182 | 3.232 | 3.274 | 3.310 | 3.344 | 3.390 | 3.420 | 3.454 | 3.482 | 3.510 | 3.532 | 3.560 | 3.584 | 3.606 | 3.620 | 3.634 | 3.652 | 3.666 | 3.680 | 3.686 | 3.694 | 3.700 | 3.706 |
4" | 3.240 | 3.320 | 3.400 | 3.432 | 3.482 | 3.524 | 3.560 | 3.594 | 3.640 | 3.670 | 3.704 | 3.732 | 3.760 | 3.782 | 3.810 | 3.834 | 3.856 | 3.870 | 3.884 | 3.902 | 3.916 | 3.930 | 3.936 | 3.944 | 3.950 | 3.956 |
4 1/4" | 3.490 | 3.570 | 3.650 | 3.682 | 3.732 | 3.774 | 3.810 | 3.844 | 3.890 | 3.920 | 3.954 | 3.982 | 4.010 | 4.032 | 4.060 | 4.084 | 4.106 | 4.120 | 4.134 | 4.152 | 4.166 | 4.180 | 4.186 | 4.194 | 4.200 | 4.206 |
4 1/2" | 3.740 | 3.820 | 3.900 | 3.932 | 3.982 | 4.024 | 4.060 | 4.094 | 4.140 | 4.170 | 4.204 | 4.232 | 4.260 | 4.282 | 4.310 | 4.334 | 4.356 | 4.370 | 4.384 | 4.402 | 4.416 | 4.430 | 4.436 | 4.444 | 4.450 | 4.456 |
4 3/4" | 3.990 | 4.070 | 4.150 | 4.182 | 4.232 | 4.274 | 4.310 | 4.344 | 4.390 | 4.420 | 4.454 | 4.482 | 4.510 | 4.532 | 4.560 | 4.584 | 4.606 | 4.620 | 4.634 | 4.652 | 4.666 | 4.680 | 4.686 | 4.694 | 4.700 | 4.706 |
5" | 4.240 | 4.320 | 4.400 | 4.432 | 4.482 | 4.524 | 4.560 | 4.594 | 4.640 | 4.670 | 4.704 | 4.732 | 4.760 | 4.782 | 4.810 | 4.834 | 4.856 | 4.870 | 4.884 | 4.902 | 4.916 | 4.930 | 4.936 | 4.944 | 4.950 | 4.956 |
5 1/4" | 4.490 | 4.570 | 4.650 | 4.682 | 4.732 | 4.774 | 4.810 | 4.844 | 4.890 | 4.920 | 4.954 | 4.982 | 5.010 | 5.032 | 5.060 | 5.084 | 5.106 | 5.120 | 5.134 | 5.152 | 5.166 | 5.180 | 5.186 | 5.194 | 5.200 | 5.206 |
(Barlow’s Formula)
P = (2ST÷D) (45,000 PSI Min Tensile Stress)
P = Burst Pressure
S = 45,000 lbs. PSI Tensile Strength
T = Nominal Wall Thickness
D = OD/ Outside Diameter
1/4" x 0.035 - 12,600 | 5/8" x 0.083 - 11,950 | 1-1/8" x 0.065 - 5,200 |
1/4 x 0.049 - 17,640 | 3/4 x 0.035 - 4,200 | 1-1/8" x 0.083 - 6,640 |
5/16" x 0.035 - 10,080 | 3/4" x 0.049 - 5,880 | 1-1/8 x 0.95 - 7,600 |
5/16 x 0.049 - 14,110 | 3/4 x 0.065 - 7,800 | 1-1/8 x 0.109 - 8,720 |
3/8" x 0.035 - 8,400 | 3/4" x 0.083 - 9,960 | 1-1/4" x 0.065 - 4,680 |
3/8 x 0.049 - 11,760 | 3/4 x 0.095 - 11,400 | 1-1/4 x 0.083 - 5,975 |
3/8" x 0.065 - 15,600 | 3/4" x 0.109 - 13,080 | 1-1/4 x 0.095 - 6,840 |
7/16 x 0.035 - 7,200 | 7/8 x 0.049 - 5,040 | 1-1/4" x 0.109 - 7,848 |
7/16" x 0.049 - 10,080 | 7/8" x 0.065 - 6,685 | 1-1/4 x 0.120 - 8,640 |
7/16 x 0.065 - 13,370 | 7/8 x 0.083 - 8,535 | 1-1/2" x 0.083 - 4,980 |
1/2" x 0.035 - 6,300 | 7/8" x 0.095 - 9,770 | 1-1/2 x 0.095 - 5,700 |
1/2 x 0.049 - 8,820 | 1" x 0.049 - 4,410 | 1-1/2" x 0.109 - 6,540 |
1/2" x 0.065 - 11,700 | 1" x 0.065 - 5,850 | 1-1/2 x 0.120 - 7,200 |
5/8 x 0.035 - 5,040 | 1" x 0.083 - 7,470 | 2" x 0.134 - 6,030 |
5/8" x 0.049 - 7,055 | 1" x 0.095 - 8,550 | 2" x 0.188 - 8,460 |
5/8 x 0.065 - 9,360 |
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