X2CrTi12 (EN 1.4512 / UNS S40900 / JIS SUH409L), commonly designated AISI 409, is a titanium-stabilized ferritic stainless steel containing 10.5–12.5% chromium. Titanium preferentially binds carbon and nitrogen, suppressing intergranular chromium carbide precipitation during welding or elevated-temperature service — a mechanism that delivers reliable structural integrity across thermal cycles. Its ferritic body-centered cubic microstructure provides a lower thermal expansion coefficient and higher thermal conductivity than austenitic grades, making it the dominant material for automotive exhaust systems worldwide. At FUSHUN METAL, X2CrTi12 / 1.4512 is produced and stocked under an ISO 9001 and AS9120B certified quality management system — every heat is verified by optical emission spectrometry (OES) and traceable to its mill certificate per EN 10204 Type 3.1.
Equivalent Grades of X2CrTi12 / S40900 Across International Standards
| Standard Body | Designation |
|---|---|
| EN (Europe) | X2CrTi12 / 1.4512 |
| ASTM (USA) | AISI 409 / UNS S40900 |
| JIS (Japan) | SUH409L / SUS409L |
| GB (China) | 022Cr11Ti / 06Cr11Ti (S11163) |
| AFNOR (France) | Z3CT12 |
| BS (UK) | 409S19 |
| DIN (Germany) | 1.4512 |
| ISO | X2CrTi12 / 4512-409-10-I |
FUSHUN METAL supplies X2CrTi12 / 1.4512 certified to EN 10088-2, ASTM A240, and JIS G 4312 — with full 3.1 mill certification per order.
FUSHUN METAL
Industrial Applications of X2CrTi12 / S40900
Automotive
Exhaust manifolds, mufflers, catalytic converter shells, tailpipes, resonator chambers, heat shields, EGR tubing, turbocharger flanges.
Industrial Equipment
Furnace panels, oven linings, air-preheater elements, flue ducts, heat exchanger tubing, thermal oxidizer internals.
Agricultural
Grain dryer panels, fertilizer spreader frames, silo structural brackets, animal housing cladding, harvester exhaust components.
Home Appliances
Washing machine inner drums, dishwasher tubs, oven cavity liners, range hood ducts, water heater flue pipes.
Construction
Structural brackets, roofing clips, flashing, expansion joint covers, facade support frames, light-gauge framing connectors.
Energy & Power
Transformer cases, battery enclosure panels (EV), solar mounting rails, flue gas ducting, waste-heat recovery shells.
FUSHUN METAL serves clients across these sectors with full-traceability material — each shipment backed by EN 10204 3.1 certification and optional third-party inspection.
Supply Range — X2CrTi12 / 1.4512 at FUSHUN METAL
Hot-Rolled Round Bar
Diameter: 10–800 mm
Length: 2,000–12,000 mm
Surface: Black / Peeled / Ground
Standard: EN 10088-2, ASTM A276
Hot-Rolled Flat Bar
Thickness: 3–120 mm
Width: 20–800 mm
Length: 2,000–6,000 mm
Edge: Sheared / Sawn
Forged Round Bar
Diameter: 100–1,200 mm
Length: 1,000–8,000 mm
Process: Open-die forged
Grain refinement: ≥5 per ASTM E112
Forged Flat / Block
Thickness: 30–600 mm
Width: 100–1,500 mm
Max single pc: ~8,000 kg
UT tested per EN 10228-3
Additional forms: cold-rolled sheet/coil (0.3–6.0 mm), welded tube (OD 6–610 mm × WT 0.5–20 mm), and custom-cut blanks. FUSHUN METAL maintains buffer stock of X2CrTi12 / 1.4512 in standard dimensions with short lead times. All products are issued with ISO 9001 & AS9120B certificates of conformance.
Chemical Composition of X2CrTi12 per EN 10088-2
| C | Si | Mn | P | S | Cr | Ti | Fe |
|---|---|---|---|---|---|---|---|
| ≤ 0.030 | ≤ 1.00 | ≤ 1.00 | ≤ 0.040 | ≤ 0.015 | 10.5–12.5 | 6×(C+N) – 0.65 | Balance |
All values in weight %. Titanium stabilization ratio is verified on every heat: Ti ≥ 6 × (C + N). At FUSHUN METAL, incoming billets and finished bars undergo OES spectrometry for full chemistry verification. Carbon and sulfur are additionally checked by combustion analysis (LECO). Each shipment is accompanied by an EN 10204 Type 3.1 inspection certificate signed by our ISO 9001 / AS9120B authorized quality representative.
Mechanical Properties of X2CrTi12 in Annealed Condition (+A)
| Property | Value | Standard / Condition |
|---|---|---|
| Tensile Strength, Rm | 380 – 560 MPa | EN 10088-2, annealed 770–830°C |
| Yield Strength, Rp0.2 | ≥ 210 MPa (L) / ≥ 220 MPa (T) | EN 10088-2, thickness ≤ 8 mm |
| Elongation A80 | ≥ 25% (L+T, < 3 mm) | EN 10088-2, gauge 80 mm |
| Elongation A | ≥ 20% (L+T, ≥ 3 mm) | EN 10088-2, proportional gauge |
| Hardness | ≤ 180 HBW / ≤ 95 HRB | ASTM A240 / EN ISO 6506 |
| Density | ~7.70 g/cm³ | Physical; magnetic (ferritic) |
| Thermal Conductivity | ~25 W/(m·K) at 20°C | EN 10088-1 reference |
| Scaling Resistance | ≤ 675°C continuous / ≤ 815°C intermittent | In oxidizing atmosphere |
Annealing is performed at 770–830°C followed by air, water, or protective-gas cooling — the grade cannot be hardened by quench-and-temper heat treatment. FUSHUN METAL verifies tensile properties on a per-heat basis using a universal testing machine calibrated to ISO 7500-1, and hardness is checked with a digital Brinell tester on every bar end. For forged products, ultrasonic testing per EN 10228-3 is available on request to confirm internal soundness.
Frequently Asked Questions — X2CrTi12 / 1.4512
Is X2CrTi12 / 1.4512 magnetic?
Yes. As a ferritic stainless steel with a body-centered cubic (BCC) crystal structure, X2CrTi12 retains magnetism under all conditions — unlike austenitic grades that become partially magnetic after cold work.
Can X2CrTi12 be welded? What filler is recommended?
Yes. TIG and MIG welding are standard. Use ER409 / ER409Nb filler wire and limit heat input below 1 kJ/mm to avoid coarse grain growth in the heat-affected zone. Pre-heating to 200–300°C and post-weld annealing at 700–750°C improve joint toughness. FUSHUN METAL can supply matching welding consumables alongside base material orders.
What is the difference between 409 (X2CrTi12) and 304 stainless steel?
304 is an austenitic grade with 18–20% Cr and 8–10.5% Ni — offering superior corrosion resistance in wet and chloride environments. X2CrTi12 (409) contains lower Cr (~11%) and no intentional Ni, giving it lower raw-material cost and better stress-corrosion-cracking resistance, but reduced pitting resistance. For dry, high-temperature oxidizing service up to ~675°C, X2CrTi12 is the more economical choice.
How does FUSHUN METAL ensure X2CrTi12 quality?
Every FUSHUN METAL heat of X2CrTi12 / 1.4512 passes through four verification gates: (1) raw material screening by OES spectrometry; (2) in-process dimensional checks during rolling/forging; (3) post-annealing mechanical testing (tensile, hardness) per EN 10088-2; and (4) final visual/dimensional inspection before dispatch. The entire chain operates under our ISO 9001 and AS9120B certified quality system, with full material traceability from mill certificate to delivery note.
Can X2CrTi12 replace aluminized carbon steel in exhaust systems?
Absolutely — this is its primary use case. Unlike aluminized coatings that degrade and expose base steel over time, X2CrTi12 offers through-thickness oxidation resistance. Service life in automotive exhaust environments typically exceeds aluminized carbon steel by 2×–3×, with no coating delamination risk, making it the preferred upgrade for OEM and aftermarket exhaust components.
