High temperature seamless pipe – continuous service up to 2000°F (1093°C); ideal for furnaces, radiant tubes, and heat treating equipment
Premium alloy composition – 25% chromium / 20% nickel for outstanding oxidation, sulfidation, and carburization resistance
Low carbon (0.08% max) – eliminates post-weld heat treatment; excellent weldability and resistance to intergranular corrosion
ASTM A312 compliant – NPS 1/8″ to 24″; SCH 5S to 160S; solution annealed; hydrotested; full mill certs included
309S stainless steel seamless pipe is a heat-resistant austenitic stainless steel with high chromium and nickel content. It is designed for applications requiring excellent oxidation resistance and strength at elevated temperatures.
Compared to standard stainless steels, 309S provides improved performance in high-temperature environments and is widely used in furnace components, thermal processing equipment, and industrial heating systems.
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Key Features
- Excellent oxidation resistance at high temperatures
- Good strength under thermal conditions
- Improved resistance to scaling
- Good weldability and fabrication performance
- Suitable for continuous high-temperature service
Chemical Composition (%)
- Cr: 22.0 – 24.0
- Ni: 12.0 – 15.0
- C: ≤0.08
- Mn: ≤2.0
- Si: ≤1.0
- Fe: Balance
Mechanical Properties
- Tensile Strength: ≥515 MPa
- Yield Strength: ≥205 MPa
- Elongation: ≥35%
High Temperature Performance
309S stainless steel seamless pipe offers excellent resistance to oxidation and scaling at temperatures up to approximately 1000–1050°C, It maintains structural integrity under continuous high-temperature exposure, making it suitable for thermal processing and furnace environments.
Applications
309S seamless pipe is widely used in:
- Furnace components
- Heat treatment equipment
- Industrial heating systems
- Petrochemical industry
- High-temperature piping systems
FAQ
Q: What is 309S stainless steel used for?
A: It is used in high-temperature applications such as furnaces, heat treatment equipment, and industrial heating systems.
Q: What is the difference between 309S and 310S?
A: 310S offers higher temperature resistance, while 309S provides a more cost-effective solution for slightly lower temperature applications.
View more stainless steel pipe 310S
| ASTM/ASMEGrade | EN Grade | GB Unified Number | Chemical Component % | ||||||||||
| C | Cr | Ni | Mn | P | S | Mo | Si | Cu | N | Other | |||
| 201 | 1.4372 | 1Cr17Mn6Ni5N | ≤0.15 | 16.00-18.00 | 3.50-5.50 | 5.50－7.50 | ≤0.060 | ≤0.030 | – | ≤1.00 | – | ≤0.25 | – |
| 202 | 1.4373 | 1Cr18Mn8Ni5N | ≤0.15 | 17.00-19.00 | 4.00-6.00 | 7.50-10.00 | ≤0.060 | ≤0.030 | ≤1.00 | – | ≤0.25 | － | |
| 301 | 1.4310 | 1Cr17Ni7 | ≤0.15 | 16.00-18.00 | 6.00-8.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤1.00 | – | 0.1 | – |
| 302 | 1.4325 | 1Cr18Ni9 | ≤0.15 | 17.00-19.00 | 8.00-10.00 | ≤2.00 | ≤0.035 | ≤0.030 | – | ≤1.00 | – | – | – |
| 303 | 1.4305 | Y1Cr18Ni9 | ≤0.15 | 17.00-19.00 | 8.00-10.00 | ≤2.00 | ≤0.20 | ≥0.15 | – | ≤1.00 | – | – | – |
| 304 | 1.4301 | 0Cr18Ni9 | ≤0.08 | 18.00-20.00 | 8.00-10.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤0.75 | – | – | – |
| 304L | 1.4307 | 00Cr19Ni10 | ≤0.030 | 18.00-20.00 | 8.00-10.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤0.75 | – | – | – |
| 304H | 1.4948 | 0Cr18Ni9 | 0.04~0.10 | 18.00-20.00 | 8.00-10.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤0.75 | – | – | – |
| 309S | 1.4833 | 0Cr23Ni13 | ≤0.08 | 22.00-24.00 | 12.00-15.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤0.75 | – | – | – |
| 309 | 1.4828 | 0Cr23Ni13 | 0.04~0.10 | 22.00-24.00 | 12.00-15.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤0.75 | – | – | – |
| 310S | 1.4842 | 0Cr25Ni20 | ≤0.08 | 24.00-26.00 | 19.00-22.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤1.5 | – | – | – |
| 310H | 1.4821 | 0Cr25Ni20 | 0.04~0.10 | 24.00-26.00 | 19.00-22.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤1.5 | – | – | – |
| 314 | 1.4841 | 0Cr25Ni20Si | ≤0.25 | 23.00-26.00 | 19.00-22.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | 1.5-3.0 | – | – | – |
| 316 | 1.4401 | 0Cr17Ni12Mo2 | ≤0.08 | 16.00-18.50 | 10.00-14.00 | ≤2.00 | ≤0.045 | ≤0.030 | 2.00-3.00 | ≤0.75 | – | – | – |
| 316L | 1.4404 | 00Cr17Ni14Mo2 | ≤0.030 | 16.00-18.00 | 10.00-14.00 | ≤2.00 | ≤0.045 | ≤0.030 | 2.00-3.00 | ≤0.75 | – | – | – |
| 316H | 1.4436 | 0Cr17Ni12Mo2N | 0.04~0.10 | 16.00-18.00 | 10.00-14.00 | ≤2.00 | ≤0.045 | ≤0.030 | 2.00-3.00 | ≤0.75 | – | 0.10-0.22 | – |
| 316Ti | 1.4571 | 0Cr17Ni12Mo2Ti | ≤0.08 | 16.00-18.50 | 10.00-14.00 | ≤2.00 | ≤0.045 | ≤0.030 | 2.00-3.00 | ≤0.75 | – | – | Ti5(C+N)~0.7 |
| 317 | 1.4445 | 0Cr19Ni13Mo3 | ≤0.08 | 18.00-20.00 | 11.00-15.00 | ≤2.00 | ≤0.045 | ≤0.030 | 3.00-4.00 | ≤0.75 | – | 0.1 | – |
| 317L | 1.4438 | 00Cr19Ni13Mo3 | ≤0.03 | 18.00-20.00 | 11.00-15.00 | ≤2.00 | ≤0.045 | ≤0.030 | 3.00-4.00 | ≤0.75 | – | 0.1 | – |
| 321 | 1.4541 | 0Cr18Ni10Ti | ≤0.08 | 17.00-19.00 | 9.00-12.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤0.75 | – | 0.1 | Ti5(C+N)~0.7 |
| 321H | 1.4940 | 0Cr18Ni10Ti | 0.04~0.10 | 17.00-19.00 | 9.00-12.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤0.75 | – | 0.1 | Ti4(C+N)~0.7 |
| 329 | 1.4480 | 0Cr26Ni5Mo2 | ≤0.08 | 23.00-28.00 | 2.00-5.00 | ≤1.00 | ≤0.040 | ≤0.030 | 1.00-2.00 | ≤0.75 | – | – | – |
| 329J1 | 1.4480 | 0Cr26Ni5Mo2 | ≤0.08 | 23.00-28.00 | 2.00-5.00 | ≤1.00 | ≤0.045 | ≤0.030 | 1.00-2.00 | ≤0.75 | – | – | – |
| 330 | 1.4864 | N08330 | ≤0.15 | 14.00-17.00 | 33.00-37.00 | ≤2.00 | ≤0.045 | ≤0.040 | 1.00-2.00 | ≤1.5 | – | – | – |
| 347 | 1.4550 | 0Cr18Ni11Nb | ≤0.08 | 17.00-19.00 | 9.00-13.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤0.75 | – | – | Nb≥10*C%-1.0 |
| 347H | 1.4912 | 0Cr18Ni11Nb | 0.04~0.10 | 17.00-19.00 | 9.00-13.00 | ≤2.00 | ≤0.045 | ≤0.030 | – | ≤0.75 | – | – | Nb≥8*C%-1.0 |
| 409L | 1.4720 | S40900 | ≤0.03 | 10.50-11.70 | 0.5 | ≤1.00 | ≤0.040 | ≤0.020 | – | ≤1.00 | – | 0.03 | Ti6(C+N)-0.5 Nb0.17 |
| 430 | 1.4016 | S43000 | ≤0.12 | 16.00-18.00 | 0.75 | ≤1.00 | ≤0.040 | ≤0.030 | – | ≤1.00 | – | – | – |
| 436 | 1.4513 | S43600 | ≤0.025 | 16.00-19.00 | – | ≤1.00 | ≤0.040 | ≤0.030 | 0.75-1.0 | ≤1.00 | ≤0.025 | Nb+Ti:8(C+N)~0.80 | |
| 439 | 1.4510 | S43035 | ≤0.030 | 17.50-18.50 | – | ≤1.00 | ≤0.040 | ≤0.015 | – | ≤1.00 | – | ≤0.030 | Ti+Nb:0.2+4C~0.75 |
| 441 | 1.4509 | S44100 | ≤0.030 | 17.50-18.50 | – | ≤1.00 | ≤0.040 | ≤0.015 | – | ≤1.00 | – | ≤0.030 | Ti:0.1-0.6 Nb:3C+0.3~1.0 |
| 442 | 1.4741 | S44200 | ≤0.025 | 18.0-23.0 | – | ≤1.00 | ≤0.040 | ≤0.035 | – | ≤1.00 | – | ||
| 443 | S44300 | ≤0.025 | 19.5-22.0 | – | ≤1.00 | ≤0.035 | ≤0.015 | – | ≤1.00 | – | ≤0.025 | Nb+Ti:0.2+4(C+N)~0.75 | |
| 444 | 1.4521 | S44400 | ≤0.025 | 17.00-20.00 | – | ≤1.00 | ≤0.040 | ≤0.030 | 1.75-2.5 | ≤1.00 | ≤0.035 | Ti+Nb:0.2+4(C+N)~0.8 | |
| 446 | 1.4749 | S44600 | ≤0.2 | 23.0-27.0 | 0.75 | ≤1.50 | ≤0.040 | ≤0.030 | – | ≤1.00 | 0.25 | ||
| 410 | 1.4006 | 1Cr13 | 0.08~0.15 | 11.50-13.50 | – | ≤1.00 | ≤0.040 | ≤0.030 | – | ≤1.00 | – | – | – |
| 420 | 1.4031 | 2Cr13 | ≥0.15 | 12.00-14.00 | – | ≤1.00 | ≤0.040 | ≤0.030 | – | ≤1.00 | – | – | – |
| 420J2 | 1.4028 | 3Cr13 | 0.26-0.35 | 12.00-14.00 | – | ≤1.00 | ≤0.040 | ≤0.030 | – | ≤1.00 | – | – | – |
| S42040 | 1.4034 | 4Cr13 | 0.36-0.45 | 12.00-14.00 | – | ≤1.00 | ≤0.040 | ≤0.030 | – | ≤1.00 | – | – | – |
| 431 | 1.4057 | 1Cr17Ni2 | ≤0.2 | 15.00-17.00 | 1.25-2.50 | ≤1.00 | ≤0.040 | ≤0.030 | – | ≤1.00 | – | – | – |
| 440A | 1.4040 | 7Cr17 | 0.60-0.75 | 16.00-18.00 | – | ≤1.00 | ≤0.040 | ≤0.030 | 0.75 | ≤1.00 | – | – | – |
| 440B | 1.4041 | 8Cr17 | 0.75-0.95 | 16.00-18.00 | – | ≤1.00 | ≤0.040 | ≤0.030 | 0.75 | ≤1.00 | – | – | – |
| 440C | 1.4023 | 11Cr17 | 0.95-1.20 | 16.00-18.00 | – | ≤1.00 | ≤0.040 | ≤0.030 | 0.75 | ≤1.00 | – | – | – |
| 17-4PH | 1.4542 | 630 | ≤0.07 | 15.50-17.50 | 3.00-5.00 | ≤1.00 | ≤0.040 | ≤0.030 | – | ≤1.00 | 3.00-5.00 | – | Nb+Ta:0.15-0.45 |
| 17-7PH | 1.4568 | 631 | ≤0.09 | 16.00-18.00 | 6.50-7.50 | ≤1.00 | ≤0.040 | ≤0.030 | – | ≤1.00 | – | – | Al 0.75-1.50 |
| 15-5PH | 1.4545 | S15500 | ≤0.09 | 14.00-15.50 | 3.50-5.50 | ≤1.00 | ≤0.040 | ≤0.030 | 2.00-3.00 | ≤1.00 | 2.50-4.50 | – | |
| 416 | 1.4005 | Y1Cr13 | ≤0.15 | 12.00-14.00 | – | ≤1.25 | ≤0.06 | ≥0.15 | – | ≤1.00 | – | – | – |
| 420F | 1.4029 | Y3Cr13 | 0.3-0.40 | 12.00-14.00 | 0.5 | ≤1.25 | ≤0.06 | ≥0.15 | – | ≤1.00 | 0.6 | – | – |
| 430F | 1.4019,1.4104 | Y1Cr17 | ≤0.12 | 16.00-18.00 | – | ≤1.25 | ≤0.06 | ≥0.15 | – | ≤1.00 | – | – | – |
| 440F | 1.4025 | Y11Cr17 | 0.95-1.20 | 16.00-18.00 | – | ≤1.25 | ≤0.06 | ≥0.15 | – | ≤1.00 | – | – | – |
| 303 | 1.4305 | S30317 | ≤0.15 | 17.00-19.00 | 8.00-10.00 | ≤2.00 | ≤0.20 | ≥0.15 | – | ||||
