Bar and Rod
Plate and Sheet
Strip
Pipe and Tube
Wire
Welding
Powder Material
Cast Products
Forged Products
Fittings
Fastening
Round Bar:
φ2–500 mm, 1–6 m length
Flat/Square Bar:
4–100 mm thickness/width
Hex Bar:
A/F 3–100 mm
Hollow Bar:
OD 20–300 mm
Sheet:
0.3–6 mm thickness
Medium Plate:
6–25 mm thickness
Heavy Plate:
25–100 mm thickness
Standard Strip:
0.05–3 mm thick,
10–600 mm wide
Precision strip:
0.01–0.5 mm thick,
tight tolerance ±0.005 mm
Foil:
0.005–0.1 mm thick
Seamless Tube:
OD 6–450 mm,
WT 1–50 mm,
1–12 m length
Welded Tube:
OD 10–600 mm,
WT 1–20 mm
Capillary Tube:
OD 1–10 mm,
WT 0.1–2 mm
Wire Form:
Cold Drawn Wire,
Bright Wire,
Spring Wire,
Fine Wire,
Ultra-fine Wire
General Diameter:
φ0.1–10 mm
Coil Weight:
50–500 kg,
customizable tolerance
Solid Wire:
φ0.8–4.0 mm
Flux-cored Wire:
φ1.2–4.0 mm
Welding Rod:
φ2.0–5.0 mm
Powder Form:
AM 3D Printing Powder,
Spherical Powder,
Gas-atomized Powder,
Water-atomized Powder
Particle Size:
10–150 μm
Sphericity:
≥90% for AM grade
Cast Ingot:
φ200–800 mm
Precision Casting:
min wall 0.5 mm
Cast Pipe:
OD 100–600 mm,
WT 10–50 mm
Forged Bar:
Φ35–500 mm
Forged Ring:
OD 200–2000 mm
Forging Weight:
1–5000 kg
Fittings Form:
Elbow, Tee, Reducer, Flange, Cap, Outlet, Lap Joint
Size range:
1/2''–24'' (DN15–DN600)
Wall thickness:
Sch10–Sch160, STD, XS, XXS
Pressure Class:
150–2500 LB
Fastening Form:
Bolt, Nut, Screw, Stud, Washer, Pin, Rivet
Metric: M3–M64
Imperial: #4–2.5''
Length: 6–500 mm
X2CrTiNb18 is a dual-stabilized (niobium and titanium) ferritic stainless steel containing about 18% chromium and no deliberate nickel. This datasheet presents the material within the Werkstoff-Nummer (DIN / EN) designation system.
With nominally 18% chromium stabilized by both niobium and titanium, 1.4509 offers good corrosion resistance, good high-temperature strength and excellent oxidation resistance, and was developed primarily for automotive exhaust systems. The dual stabilization ties up carbon and nitrogen, giving excellent weldability without the risk of intergranular corrosion and without post-weld annealing, while niobium in solid solution improves elevated-temperature strength. Despite its ferritic structure it exhibits relatively good plasticity and formability, and being nickel-free it is magnetic and largely immune to chloride stress-corrosion cracking.
Typical applications include automotive exhaust systems (hot and cold ends), heat exchangers, hot-water tanks, kitchen and household equipment, and welded components.
Typical values, annealed condition, per EN reference data.
| Property | Value | Unit |
|---|---|---|
| Density | 7.7 | g/cm³ |
| Melting range | 1480–1530 | °C |
| Elastic modulus | 220 | GPa |
| Coefficient of thermal expansion (20–100 °C) | 10.0 | µm/m·°C |
| Thermal conductivity (20 °C) | 25.0 | W/m·K |
| Specific heat (20 °C) | 460 | J/kg·K |
| Structure | Ferritic | — |
Specified per EN 10088-2 (W.Nr. 1.4509, X2CrTiNb18).
| Element | Symbol | Min % | Max % | Role in Alloy |
|---|---|---|---|---|
| Iron | Fe | Balance | — | Base element |
| Chromium | Cr | 17.5 | 18.5 | Corrosion / oxidation resistance |
| Niobium | Nb | 3×C+0.30 | 1.00 | Primary stabiliser; high-temperature strength |
| Titanium | Ti | 0.10 | 0.60 | Co-stabiliser; ties up C and N |
| Manganese | Mn | — | 1.00 | Deoxidiser |
| Silicon | Si | — | 1.00 | Deoxidiser |
| Carbon | C | — | 0.030 | Low (stabilised, weldability) |
| Nitrogen | N | — | 0.030 | Low (stabilised) |
| Phosphorus | P | — | 0.040 | Residual impurity |
| Sulphur | S | — | 0.015 | Residual impurity |
Nominal: 18Cr dual-stabilized (Nb + Ti) ferritic stainless steel.
Annealed (+A) condition, per EN 10088-2 for W.Nr. 1.4509.
| Condition | Property | Value |
|---|---|---|
| Annealed | Tensile strength (Rm) | 430–630 MPa |
| Annealed | 0.2% proof strength (Rp0.2) | ≥250 MPa |
| Annealed | Elongation (A5) | ≥18 % |
| Annealed | Hardness | ≤200 HB |
| — | Elastic modulus | 220 GPa |
Values per EN 10088-2; resistant to intergranular corrosion owing to dual stabilization. Confirm against the inspection certificate (EN 10204).
| Environment | Performance | Notes |
|---|---|---|
| Atmospheric / general | Very Good | Comparable to 1.4301 in many media |
| Exhaust-gas / condensate | Very Good | Designed for exhaust service |
| Chloride stress-corrosion cracking | Very Good | Ferritic — largely immune |
| Pitting / crevice corrosion | Moderate | Below molybdenum-bearing grades |
| Oxidation (elevated temperature) | Very Good | Superior to 1.4512 / 1.4510 |
Corrosion resistance is comparable to 1.4301 in many environments, with immunity to chloride stress-corrosion cracking and superior high-temperature strength among the standard ferritics.
A ferritic grade; cannot be hardened by heat treatment. Properties are set by annealing.
Anneal Heat to approximately 800–900 °C and cool in air. Owing to dual stabilization, post-weld annealing is not required to restore intergranular corrosion resistance. Avoid prolonged exposure near 475 °C (embrittlement).
Excellent weldability without the risk of intergranular corrosion owing to dual (Nb + Ti) stabilization; post-weld annealing is not required.
| Welding Process | Applicability | Filler / Consumable |
|---|---|---|
| GTAW / TIG | Very Good | Stabilized ferritic or nickel-base filler |
| GMAW / MIG | Good | Matching stabilized filler |
| Resistance / seam | Very Good | — |
Use a stabilized stainless or nickel-base filler to maintain weld-metal corrosion resistance.
Machining Guidelines
| Parameter | Recommendation |
|---|---|
| Machinability | Good; similar to other ferritic grades |
| Work hardening | Low rate — relatively good plasticity |
| Coolant | Ample flood coolant |
Forming Processes
| Process | Notes |
|---|---|
| Cold forming | Good — bending, roll forming, deep drawing |
| Hot forming | ~1100–800 °C; anneal afterward |
| Industry | Typical Components | Key Requirements |
|---|---|---|
| Automotive | Exhaust systems (hot and cold end) | High-temperature strength + oxidation resistance |
| Heat transfer | Heat exchangers, tubing | Thermal stability + SCC resistance |
| Water heating | Hot-water tanks | Corrosion resistance + weldability |
| Household | Kitchen and appliance components | Formability + corrosion resistance |
| Product Form | DIN / EN Standard | Notes |
|---|---|---|
| Plate, sheet and strip | EN 10088-2 · W.Nr. 1.4509 | X2CrTiNb18 |
| Bar, rod and sections | EN 10088-3 · W.Nr. 1.4509 | — |
| Welded tube | EN 10296-2 · W.Nr. 1.4509 | — |
| Technical delivery | SEW 400 | — |
Dual-stabilized (Nb + Ti) ferritic stainless steel. W.Nr. 1.4509 (X2CrTiNb18).
| EN Symbol | Cr % | Stabiliser | C % | Best Used For |
|---|---|---|---|---|
| X2CrTiNb18 | 17.5–18.5 | Nb + Ti | ≤0.03 | 18Cr dual-stabilized ferritic; hot exhaust, high-T strength |
| X3CrTi17 | 16–18 | Ti | ≤0.05 | 17Cr-Ti ferritic; cold-end exhaust |
| X2CrTi12 | 10.5–12.5 | Ti | ≤0.03 | 11Cr muffler-grade ferritic |
| X6Cr17 | 16–18 | — | ≤0.08 | General ferritic; non-stabilized |
| X2CrMoTi18-2 | 17.5–19.5 | Ti | ≤0.025 | 18Cr-2Mo ferritic; higher corrosion resistance (444) |
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