Труба ASTM A312
- TP304/304L
- TP316/316L
- TP321/321H
- TP347/347H
- TP317L / UNS S31703
- 904L / UNS N08904
- 254 SMO / UNS S31254
- TP310S / UNS S31008
- TP316H / UNS S31609
- TP309S / UNS S30908

Welded stainless steel pipes are available in sizes ranging from 1/2″ to 104″,with wall thicknesses from SCH5S to SCH80S/XS.
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Chemical Composition of ASTM A312 Pipe
ASTM A312 TP304 and TP304L are austenitic stainless steels.The difference between the two lies in the upper limit of carbon and nickel content.
| Элемент | C | Cr | Ni | Mn | Si | п | S | N | Fe |
|---|---|---|---|---|---|---|---|---|---|
| TP304 | ≤ 0,08% | 18.0% – 20.0% | 8.0% – 11.0% | ≤ 2.00% | ≤ 1.00% | ≤ 0,045% | ≤ 0,030% | ≤ 0,10% | Остаток средств |
| TP304L | ≤ 0.035% | 18.0% – 20.0% | 8.0% – 13.0% | ≤ 2.00% | ≤ 1.00% | ≤ 0,045% | ≤ 0,030% | ≤ 0,10% | Остаток средств |
ASTM A312 TP316 and TP316L are molybdenum-containing austenitic stainless steels.Compared to 304 series stainless steels,they offer superior resistance to localized pitting and chloride corrosion.Kaysuns typically supplies these grades with dual certification.
| Элемент | C | Пн | Cr | Ni | Mn | Si | п | S | N | Fe |
|---|---|---|---|---|---|---|---|---|---|---|
| TP316 | ≤ 0,08% | 2.00% – 3.00% | 16.0% - 18.0% | 10.0% - 14.0% | ≤ 2.00% | ≤ 1.00% | ≤ 0,045% | ≤ 0,030% | ≤ 0,10% | Остаток средств |
| TP316L | ≤ 0.035% | 2.00% – 3.00% | 16.0% - 18.0% | 10.0% – 15.0% | ≤ 2.00% | ≤ 1.00% | ≤ 0,045% | ≤ 0,030% | ≤ 0,10% | Остаток средств |
ASTM A312 TP321 and TP321H are titanium-stabilized austenitic трубы из нержавеющей стали.The main difference lies in their carbon (C) content and the corresponding proportion of titanium (Ti) stabilizer.
| Элемент | C | Ti | Cr | Ni | Mn | Si | п | S | N | Fe |
|---|---|---|---|---|---|---|---|---|---|---|
| TP321 | ≤ 0,08% | 5 × (C + N) to 0.7% | 17.0% - 19.0% | 9.0% - 12.0% | ≤ 2.00% | ≤ 1.00% | ≤ 0,045% | ≤ 0,030% | ≤ 0,10% | Остаток средств |
| TP321H | 0,04% - 0,10% | 4 × C to 0.7% | 17.0% - 19.0% | 9.0% - 12.0% | ≤ 2.00% | ≤ 1.00% | ≤ 0,045% | ≤ 0,030% | ≤ 0,10% | Остаток средств |
Standard TP347 is suitable for general chemical processing at moderate temperatures,while the high-carbon TP347H offers significantly superior creep strength and stress rupture strength under extreme temperature conditions.
| Элемент | C | Cb / Nb | Cr | Ni | Mn | Si | п | S | N | Fe |
|---|---|---|---|---|---|---|---|---|---|---|
| TP347 | ≤ 0,08% | 10 × C to 1.10% | 17.0% - 19.0% | 9.0% - 12.0% | ≤ 2.00% | ≤ 1.00% | ≤ 0,045% | ≤ 0,030% | – | Остаток средств |
| TP347H | 0,04% - 0,10% | 8 × C to 1.10% | 17.0% - 19.0% | 9.0% – 13.0% | ≤ 2.00% | ≤ 1.00% | ≤ 0,045% | ≤ 0,030% | ≤ 0,10% | Остаток средств |
ASTM A312 TP317L (UNS S31703) is a low-carbon,molybdenum-containing austenitic stainless steel pipe.It is an upgraded version of TP316L with higher alloy content and is specifically designed to withstand highly corrosive chemical media.
| Элемент | Пн | Cr | Ni | C | Mn | Si | п | S | N | Fe |
|---|---|---|---|---|---|---|---|---|---|---|
| TP317L(S31703) | 3.00% – 4.00% | 18.0% - 20.0% | 11.0% - 15.0% | ≤ 0,030% | ≤ 2.00% | ≤ 1.00% | ≤ 0,045% | ≤ 0,030% | ≤ 0,10% | Остаток средств |
ASTM A312 904L (UNS N08904) was originally developed for use in extremely high-concentration sulfuric acid applications.Its unique chemical composition combines very high concentrations of nickel and chromium with specific additions of molybdenum and copper.
| Элемент | Ni | Cr | Пн | Cu | C | Mn | Si | п | S | Fe |
|---|---|---|---|---|---|---|---|---|---|---|
| 904L(N08904) | 23.0% – 28.0% | 19.0% – 23.0% | 4.00% – 5.00% | 1.00% – 2.00% | ≤ 0.020% | ≤ 2.00% | ≤ 1.00% | ≤ 0.040% | ≤ 0,030% | Остаток средств |
ASTM A312 254 SMO (UNS S31254) is characterized by a significantly higher molybdenum content and the deliberate addition of nitrogen to enhance its mechanical strength and structural stability,thereby preventing alloy segregation.
| Элемент | Пн | Cr | Ni | N | Cu | C | Mn | Si | п | S | Fe |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 254 SMO | 6.0% – 6.5% | 19.5% – 20.5% | 17.5% – 18.5% | 0.18% – 0.25% | 0.5% – 1.0% | ≤ 0.020% | ≤ 1.00% | ≤ 0,08% | ≤ 0,030% | ≤ 0.010% | Остаток средств |
According to the ASTM A312 standard, the chemical composition limits for TP310S are as follows:
| Элемент | Cr | Ni | C | Mn | Si | п | S | Fe |
|---|---|---|---|---|---|---|---|---|
| TP310S(S31008) | 24.00% – 26.00% | 19.00% – 22.00% | ≤ 0,08% | ≤ 2.00% | ≤ 1.50% | ≤ 0,045% | ≤ 0,030% | Остаток средств |
ASTM A312 TP316H (UNS S31609) is a high-carbon variant of molybdenum-containing austenitic stainless steel pipe.By maintaining carbon content within a specific,higher range,it offers exceptional resistance.
| Элемент | C | Пн | Cr | Ni | Mn | Si | п | S | Fe |
|---|---|---|---|---|---|---|---|---|---|
| TP316H(S31609) | 0,04% - 0,10% | 2.00% – 3.00% | 16.00% – 18.00% | 10.00% – 14.00% | ≤ 2.00% | ≤ 1.00% | ≤ 0,045% | ≤ 0,030% | Остаток средств |
TP309S (UNS S30908) is a high-chromium,high-nickel austenitic stainless steel pipe.According to the ASTM A312 standard,the chemical composition limits for TP309S are as follows:
| Элемент | Cr | Ni | C | Mn | Si | п | S | Fe |
|---|---|---|---|---|---|---|---|---|
| TP309S(S30908) | 22.00% – 24.00% | 12.00% – 15.00% | ≤ 0,08% | ≤ 2.00% | ≤ 1.00% | ≤ 0,045% | ≤ 0,030% | Остаток средств |
Mechanical Properties of ASTM A312 Pipe
| Оценка | Предел прочности | Предел текучести | Удлинение | Твердость |
|---|---|---|---|---|
| TP304 / TP316 | ≥ 515 МПа (75 ksi) | ≥ 205 МПа (30 ksi) | ≥ 35% | ≤ 192 HBW (90 HRB) |
| TP304L / TP316L | ≥ 485 МПа (70 ksi) | ≥ 170 МПа (25 ksi) | ≥ 35% | ≤ 192 HBW (90 HRB) |
| TP321 / TP347 | ≥ 515 МПа (75 ksi) | ≥ 205 МПа (30 ksi) | ≥ 35% | ≤ 192 HBW (90 HRB) |
| TP321H / TP347H | ≥ 515 МПа (75 ksi) | ≥ 205 МПа (30 ksi) | ≥ 35% | ≤ 192 HBW (90 HRB) |
| TP316H | ≥ 515 МПа (75 ksi) | ≥ 205 МПа (30 ksi) | ≥ 35% | ≤ 192 HBW (90 HRB) |
| TP317L | ≥ 515 МПа (75 ksi) | ≥ 205 МПа (30 ksi) | ≥ 35% | ≤ 192 HBW (90 HRB) |
| TP309S / TP310S | ≥ 515 МПа (75 ksi) | ≥ 205 МПа (30 ksi) | ≥ 35% | ≤ 192 HBW (90 HRB) |
| 904L | ≥ 490 MPa (71 ksi) | ≥ 220 МПа (32 ksi) | ≥ 35% | 90 HRB / 70 HRB |
| 254 SMO | ≥ 650 МПа (94 кси) | ≥ 300 МПа (44 ksi) | ≥ 35% | ≤ 250 HBW (100 HRB) |
ASTM A312 Pipe Dimensions and Tolerances
Dimensions For ASTM A312 Pipe
| НПС | OD,mm | 5S WT,mm | 10S WT,mm | 40S WT,mm | 80S WT,mm |
|---|---|---|---|---|---|
| 1/8″ | 0.405″ 10.3 mm | – | 0.049″ 1.24 mm | 0.068″ 1.73 mm | 0.095″ 2.41 mm |
| 1/4″ | 0.540″ 13.7 mm | – | 0.065″ 1.65 mm | 0.088″ 2.24 mm | 0.119″ 3.02 mm |
| 3/8″ | 0.675″ 17.1 mm | – | 0.065″ 1.65 mm | 0.091″ 2.31 mm | 0.126″ 3.20 mm |
| 1/2″ | 0.840″ 21,3 мм | 0.065″ 1.65 mm | 0.083″ 2.11 mm | 0.109″ 2,77 мм | 0.147″ 3.73 mm |
| 3/4″ | 1.050″ 26,7 мм | 0.065″ 1.65 mm | 0.083″ 2.11 mm | 0.113″ 2,87 мм | 0.154″ 3,91 мм |
| 1″ | 1.315″ 33,4 мм | 0.065″ 1.65 mm | 0.109″ 2,77 мм | 0.133″ 3,38 мм | 0.179″ 4.55 mm |
| 1-1/4″ | 1.660″ 42.2 mm | 0.065″ 1.65 mm | 0.109″ 2,77 мм | 0.140″ 3.56 mm | 0.191″ 4.85 mm |
| 1-1/2″ | 1.900″ 48,3 мм | 0.065″ 1.65 mm | 0.109″ 2,77 мм | 0.145″ 3,68 мм | 0.200″ 5.08 mm |
| 2″ | 2.375″ 60,3 мм | 0.065″ 1.65 mm | 0.109″ 2,77 мм | 0.154″ 3,91 мм | 0.218″ 5.54 mm |
| 2-1/2″ | 2.875″ 73.0 mm | 0.083″ 2.11 mm | 0.120″ 3.05 mm | 0.203″ 5.16 mm | 0.276″ 7.01 mm |
| 3″ | 3.500″ 88,9 мм | 0.083″ 2.11 mm | 0.120″ 3.05 mm | 0.216″ 5,49 мм | 0.300″ 7.62 mm |
| 4″ | 4.500″ 114,3 мм | 0.083″ 2.11 mm | 0.120″ 3.05 mm | 0.237″ 6,02 мм | 0.337″ 8.56 mm |
| 6″ | 6.625″ 168,3 мм | 0.109″ 2,77 мм | 0.134″ 3.40 mm | 0.280″ 7,11 мм | 0.432″ 10.97 mm |
| 8″ | 8.625″ 219,1 мм | 0.109″ 2,77 мм | 0.148″ 3.76 mm | 0.322″ 8,18 мм | 0.500″ 12.70 mm |
| 10″ | 10.750″ 273.0 mm | 0.134″ 3.40 mm | 0.165″ 4.19 mm | 0.365″ 9.27 mm | 0.500″ 12.70 mm |
| 12″ | 12.750″ 323.8 mm | 0.156″ 3.96 mm | 0.180″ 4.57 mm | 0.375″ 9.53 mm | 0.500″ 12.70 mm |
Outside Diameter Tolerance
| NPS Range | Over Tolerance (Plus) | Under Tolerance (Minus) |
|---|---|---|
| 1/8″ to 1-1/2″ (NPS 1/8 to 1-1/2) | +1/64 in. (+0.4 mm) | -1/32 in. (-0.8 mm) |
| Over 1-1/2″ to 4″ (NPS 1-1/2 to 4) | +1/32 in. (+0.8 mm) | -1/32 in. (-0.8 mm) |
| Over 4″ to 8″ (NPS 4 to 8) | +1/16 in. (+1.6 mm) | -1/32 in. (-0.8 mm) |
| Over 8″ to 18″ (NPS 8 to 18) | +3/32 in. (+2.4 mm) | -1/32 in. (-0.8 mm) |
| Over 18″ to 26″ (NPS 18 to 26) | +1/8 in. (+3.2 mm) | -1/32 in. (-0.8 mm) |
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