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ASTM A688 Welded Austenitic Stainless Steel Feedwarter Heater Tubes
Applications: Heater
Size range: O.D.: 4.0-230mm W.T.:1-30mm L: according to customer requirement
Mechanical Requirement
| Grade: | TP304 | TP304L | TP304LN | TP316 | TP316L | TP316LN | TP316LN | TPXM-29 | TP304N |
| UNS | S30400 | S30403 | S30453 | S31600 | S31603 | S31653 | S31653 | S24000 | S30451 |
| C, max | 0.08 | 0.035 | 0.035 | 0.080 | 0.035 | 0.035 | 0.035 | 0.08 | 0.080 |
| Mn, max | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 | 2.00 | 11.5-14.5 | 2.00 |
| P, max | 0.045 | 0.045 | 0.045 | 0.045 | 0.045 | 0.045 | 0.045 | 0.060 | 0.045 |
| S, max | 0.030 | 0.030 | 0.030 | 0.030 | 0.030 | 0.030 | 0.030 | 0.030 | 0.030 |
| Si, max | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 | 1.00 |
| Ni | 18.0-20.0 | 18.0-20.0 | 18.0-20.0 | 16.0-18.0 | 16.0-18.0 | 16.0-18.0 | 16.0-18.0 | 17.0-19.0 | 18.0-20.0 |
| Cr | 8.0-11.0 | 8.0-13.0 | 8.0-12.0 | 11.0-14.0 | 10.0-14.0 | 11.0-14.0 | 11.0-14.0 | 2.3-3.7 | 8.0-18.0 |
| Mo | … | … | … | 2.00-3.00 | 2.00-3.00 | 2.00-3.00 | 2.00-3.00 | … | … |
| Nitrogen | … | … | … | … | … | … | … | … | … |
| Copper | … | … | … | … | … |
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| Grade: | TP316N | … | … | … | … |
| UNS | S31651 | N08367 | N08926 | S31254 | S32654 |
| C, max | 0.070 | 0.030 | 0.020 | 0.020 | 0.020 |
| Mn, max | 2.00 | 2.00 | 2.00 | 1.00 | 2.0-4.0 |
| P, max | 0.045 | 0.040 | 0.030 | 0.030 | 0.030 |
| S, max | 0.030 | 0.030 | 0.010 | 0.100 | 0.005 |
| Si, max | 4.8-6.0 | 1.00 | 0.50 | 0.80 | 0.50 |
| Ni | 9.58.0 | 20.0-22.0 | 24.0-26.0 | 19.5-20.5 | 21.0-23.0 |
| Cr | 19.0-22.0 | 23.5-25.5 | 19.0-21.0 | 17.5-18.5 | 24.0-25.0 |
| Mo | 0.30-1.50 | 6.0-7.0 | 6.0-7.0 | 6.0-6.5 | 7.0-8.0 |
| Nitrogen | … | … | … | … | 0.45-0.55 |
| Copper | … | … | … | 0.30-0.60 |
Tensile Requirements
| Grade and UNS | Tensile strength min ksi [Mpa] | Yield strength min ksi [Mpa] | Elongation in 2in or 50mm min % | ||||||
| 304, 316 S30400, S31600 | 75 [515] | 30 [205] | 35 | ||||||
| 304L, 316L S30403, S31603 | 70 [485] | 25 [175] | 35 | ||||||
| XM-29 S24000 | 100 [690] | 55 [380] | 35 | ||||||
| 304N, 316N S30451, S31651 | 80 [550] | 35 [240] | 20 | ||||||
| 304LN, 316LN S30453, S31653 | 75 [515] | 30 [205] | 35 | ||||||
| N08367 t≤0.187 | 100 [690] | 45 [310] | 30 | ||||||
| N08367 t＞0.187 | 95 [655] | 45 [310] | 30 | ||||||
| N08926 | 94 [650] | 45 [310] | 35 | ||||||
| S31254 t≤0.187 | 100 [690] | 45 [310] | 35 | ||||||
| S21254 t＞0.187 | 95 [655] | 45 [310] | 35 | ||||||
| S32654 | 120 [825] | 65 [450] | 40 | ||||||
Permissible Variations in Dimensions
| Gro | Size, | Permissible | Permis | Permisible | |
| 1 | Up to 1/2(12.7), excl | ±0.005[0.13] | ±15 | 1/8[3] | 0 |
| 2 | 1/2 to 1 1/2(12.7 to 38.1 excl | ±0.005[0.13] | ±10 | 1/8[3] | 0 |
| 3 | 1 1/2 to 3 1/2(38.1 to 88.9 excl | ±0.010[0.25] | ±10 | 3/16[5] | 0 |
| 4 | 3 1/2 to 5 1/2(88.9 to 139.7 excl | ±0.015[0.38] | ±10 | 3/16[5] | 0 |
| 5 | 5 1/2 to 5 1/2(139.7 to 230.2 excl | ±0.030[0.76] | ±10 | 3/16[5] | 0 |
