209 Stainless Steel Tube – The Ultimate High-Strength, Corrosion-Resistant Solution for Offshore and High-Pressure Applications
When your project demands twice the strength of 316L and full resistance to marine chlorides, 209 Stainless Steel Tube (UNS S20910, Nitronic 50, XM-19) is the only logical choice. This nitrogen-strengthened austenitic grade delivers yield strength up to 100 ksi (690 MPa) while maintaining excellent ductility, full non-magnetic properties down to –196 °C, and superior resistance to sulfide stress cracking. Whether you are building subsea umbilicals, high-pressure hydraulic lines, or downhole tools, 209 stainless steel tube offers the strength, fatigue life, and corrosion resistance that 316L simply cannot match—without the cost penalty of duplex or nickel-base alloys.
209 Stainless Steel Tube – Nitronic 50 (XM-19) Seamless, 100 ksi Yield, NACE MR0175 Approved
Key Features & Benefits
- Yield strength ≥690 MPa (100 ksi) – twice that of 316L
- PREN ≥34 – superior pitting resistance vs 316L (PREN 24)
- Full non-magnetic properties – even after severe cold work
- Excellent toughness down to –196 °C – no ductile-to-brittle transition
- Superior fatigue & galling resistance – ideal for pump shafts & valve stems
- NACE MR0175/ISO 15156 compliant – sour-service approved
- Full weldability – TIG, laser, plasma; no post-weld anneal required
Technical Specifications
Table 1 – Chemical Composition (ASTM A269)
| Element | 209 (XM-19) % | 316L % | 2205 % | 904L % |
|---|---|---|---|---|
| Cr | 20.5–23.5 | 16.0–18.0 | 21.0–23.0 | 19.0–21.0 |
| Ni | 11.5–13.5 | 10.0–14.0 | 4.5–6.5 | 23.0–28.0 |
| Mo | 1.5–3.0 | 2.0–3.0 | 2.5–3.5 | 4.0–5.0 |
| Nb | 0.1–0.3 | — | — | — |
| N | 0.2–0.4 | ≤0.03 | 0.08–0.2 | ≤0.02 |
| Fe | Balance | Balance | Balance | Balance |
Table 2 – Mechanical & Physical Properties
| Property | Room Temp. | 650 °C | PREN |
|---|---|---|---|
| Yield Strength (0.2 %) | ≥690 MPa (100 ksi) | ≥380 MPa | ≥34 |
| Tensile Strength | ≥860 MPa (125 ksi) | ≥520 MPa | — |
| Elongation in 2" | ≥35 % | ≥20 % | — |
| Hardness | ≤295 HB | — | — |
| Density | 7.88 g/cm³ (0.285 lb/in³) | — | — |
| Thermal Expansion | 16.2 µm/m·K (20–100 °C) | — | — |
Data extracted from Fine Tubes datasheet [^21^].
Standard Sizes & Standards
| OD (mm) | Wall (mm) | Sch | Standards | Compliance |
|---|---|---|---|---|
| 6–25 | 1–3 | — | ASTM A269, A213 | NACE MR0175 |
| 25–89 | 1–10 | 10S/40S/80S | ASTM A312, ASME SA312 | NACE MR0175 |
| 89–219 | 2–20 | 20/40/80 | ASTM A376, ASME SA376 | NACE MR0175 |
| 219–508 | 3–30 | XXS | ASTM A789, ASME SA789 | NACE MR0175 |
Custom lengths 3–12 m, cut-to-size, and honed ID available.
Main Applications
- Offshore platforms – subsea umbilicals, hydraulic control lines
- High-pressure hydraulic & instrumentation tubing – 15 000 psi rated
- Pump shafts, valve stems, marine propeller shafts – non-galling surface
- Downhole tooling – drill collars, MWD housings
- Chemical process vessels – chloride-rich brines, hypochlorite piping
- Desalination high-pressure piping – RO membrane housings
- Cryogenic service – LNG loading arms, cold boxes
- Aerospace – hydraulic actuators, landing gear components
100 % NDT Inspected – 209 Stainless Steel Tube for Critical Offshore & Downhole Service
Why Choose Our 209 Stainless Steel Tube
- Direct mill with 80 000 tons annual Nitronic capacity – 5-day lead time
- Full NACE + PED + ABS/DNV certification – accepted by major oil companies
- EN 10204 3.1 & 3.2 MTC supplied – full heat traceability
- In-house heat treatment & NDT – UT, RT, PMI, hydrostatic to 1.5× WP
- Cut-to-length & polished service – Ra ≤0.2 µm mirror finish
- Houston + Shanghai dual stock – same-day shipment worldwide
Always in Stock – 209 Stainless Steel Tube Mill-Direct Supply, Fastest Delivery Worldwide
Grade Comparison Table: 209 vs 316L vs 317L vs 2205 vs 2507 vs AL-6XN
| Grade | Cr % | Ni % | Mo % | PREN | Yield MPa | Relative Cost | Best Use |
|---|---|---|---|---|---|---|---|
| 209 (XM-19) | 20.5–23.5 | 11.5–13.5 | 1.5–3.0 | ≥34 | ≥690 | 1.5× | High-strength marine |
| 316L | 16–18 | 10–14 | 2–3 | 24 | ≥205 | 1.0× (base) | General chloride |
| 317L | 18–20 | 11–15 | 3–4 | 28 | ≥205 | 1.3× | Pulp bleach |
| 2205 | 22–23 | 4.5–6.5 | 3–3.5 | 35 | ≥450 | 1.4× | Dup chloride |
| 2507 | 25 | 7 | 4 | 42 | ≥550 | 2.0× | Super-duplex |
| AL-6XN | 20–22 | 24 | 6–7 | 46 | ≥310 | 3.0× | Super-austenitic |
FAQ – 209 Stainless Steel Tube
-
Price vs duplex 2205?
209 stainless steel tube is ~10 % cheaper than 2205 for seamless sizes, yet offers similar strength and better ductility [^21^]. -
Maximum service temperature?
400 °C continuous; intermittent to 500 °C with acceptable oxidation rate [^21^]. -
Weldability compared to 316L?
Full weldability by TIG, laser, plasma; no post-weld anneal required for most services [^21^]. -
Difference between 209 and XM-19?
Same grade – XM-19 is the ASTM designation, 209 is the unified numbering system (UNS S20910) [^21^]. -
NACE sour service approval?
Yes, 209 stainless steel tube is listed in NACE MR0175/ISO 15156 for sour environments up to 30 Hc [^21^]. -
Stock availability for 2" Sch 80S?
2 000 t ready inventory; live portal updated every 30 minutes. -
Lead time for 6 m seamless?
5 days production + 3–5 days ocean freight to Asian ports; 10 days to EU/US warehouses. -
Do you export worldwide?
Yes, to 80+ countries including USA, UK, Norway, UAE, Brazil, and Australia.
Call-to-Action
Stop paying duplex premiums. Contact the largest 209 stainless steel tube producer today for the most competitive price, immediate access to massive stock, and same-day cutting of any size.