Stainless Steel X2CrTi21-AW (As-welded deposit)
Heat-treated state
EN X2CrTi21
Reference condition for welded tube and fabricated assemblies — Ti stabilization keeps corrosion resistance, but HAZ grain growth cuts toughness.
Values for the AW condition
Other X2CrTi21 tempers and conditions
X2CrTi21 is listed in 4 conditions; see the grade overview at X2CrTi21.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AWThis page As-welded deposit | Reference condition for welded tube and fabricated assemblies — Ti stabilization keeps corrosion resistance, but HAZ grain growth cuts toughness. | 290 | 470 | 20 | 165 HB | 2.9 % IACS |
AnnealedDefault Annealed (softened, 800–900 °C, air/water cooled) | Standard stocked condition for sheet, strip, plate and bar — best formability and corrosion resistance. | 300 | 480 | 28 | 170 HB | — |
Temper rolled 1/4 Hard | Use where extra stiffness/springback in flat parts is needed and forming demands are light. | 450 | 560 | 12 | 15 HRC | 2.8 % IACS |
Half hard | Niche strip condition for flat springs, clamps and roll-formed profiles that are not deep drawn. | 530 | 620 | 8 | 20 HRC | 2.9 % IACS |
What is X2CrTi21-AW?
X2CrTi21-AW is X2CrTi21 heat treated to AW — reference condition for welded tube and fabricated assemblies — Ti stabilization keeps corrosion resistance, but HAZ grain growth cuts toughness. X2CrTi21-AW has a yield strength of 290 MPa (42.1 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 72% of stainless steel grades. Elongation at break is 20% and the elastic modulus is 220 GPa (31.9 Msi). X2CrTi21-AW has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,450°C (2,642 °F). Annealed is the default condition FabDigit quotes; AW is available on request or by drawing note.
Advantages
- Low embodied carbon — 2.9 kg CO₂/kg, better than 98% of stainless steel grades
- Easy to machine — 48/100, better than 88% of stainless steel grades
- High electrical conductivity — 2.9 % IACS, better than 87% of stainless steel grades
- High service temperature — 900°C (1,652 °F), better than 85% of stainless steel grades
- Conducts heat well — 23 W/m·K (13.3 BTU/hr·ft·°F), better than 78% of stainless steel grades
Limitations
- Limited ductility — 20%, worse than 79% of stainless steel grades
X2CrTi21-AW properties
Typical room-temperature values for X2CrTi21-AW; 22 are specific to this condition. Other listed values are X2CrTi21 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
X2CrTi21-AW has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,450°C (2,642 °F).
Mechanical14
X2CrTi21-AW has a yield strength of 290 MPa (42.1 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 72% of stainless steel grades. Elongation at break is 20% and the elastic modulus is 220 GPa (31.9 Msi).
Thermal6
X2CrTi21-AW is rated for continuous service to 900°C (1,652 °F). It conducts heat at 23 W/m·K (13.3 BTU/hr·ft·°F), better than 78% of stainless steel grades. Thermal expansion is 10.4 µm/m·K (5.78 µin/in·°F).
Electrical3
X2CrTi21-AW conducts electricity at 2.9 % IACS, better than 87% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (56/100), worse than 66% of stainless steel grades.
Sustainability4
Producing a kilogram of X2CrTi21-AW takes about 40 MJ of energy and emits 2.9 kg of CO₂ — less than 97% of stainless steel grades. Typical recycled content is 70%.
Manufacturability7
X2CrTi21-AW's machinability is fair (48/100, better than 88% of stainless steel grades); weldability very good (75/100); formability good (55/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with X2CrTi21-AW
Is X2CrTi21 easy to machine?
Machines like 430/439 — use sharp positive-rake carbide, rigid setups, heavy feeds and generous coolant to avoid work-hardened glazing; expect ~55 % of AISI 1212 rates.
Can X2CrTi21 be welded?
Excellent for GTAW/GMAW/laser/resistance welding without post-weld annealing thanks to Ti stabilization; keep heat input low and interpass < 150 °C to limit HAZ grain coarsening, use Ar (no N2) shielding and back purge.
Can X2CrTi21 be formed, bent or molded?
Good deep drawing and roll forming with low springback and no ridging when fine-grained; avoid severe stretch forming (lower n-value than austenitics) and warm the tooling for very deep draws.
What surface finishes work on X2CrTi21?
Pickle and passivate after welding to restore the passive film; takes 2B/BA/No.4 mill finishes, buff polishing, electropolishing and PVD colour coatings — anodizing does not apply.
X2CrTi21 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Clow-interstitial | ≤ 0.03 | 0.02 |
| Si | ≤ 1 | 0.4 |
| Mn | ≤ 1 | 0.4 |
| P | ≤ 0.04 | 0.03 |
| S | ≤ 0.02 | 0 |
| Cr | 20 – 22 | 21 |
| Tistabilizer, typically ≥ 4×(C+N)+0.15 | 0.15 – 0.8 | 0.35 |
| N | ≤ 0.03 | 0.02 |
| Niresidual | ≤ 0.5 | 0.2 |
| Fe | balance | — |
X2CrTi21-AW — frequently asked
What is X2CrTi21-AW used for?
X2CrTi21-AW is typically used for automotive exhaust and trim components, architectural cladding, kitchen equipment, heat exchangers and decorative sheet parts. In short: ti-stabilized, weld-ready ferritic; good deep-drawing formability; lower-cost 304 substitute.
What is the yield strength of X2CrTi21-AW?
X2CrTi21-AW has a typical yield strength of 290 MPa (42.1 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 72% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is X2CrTi21-AW easy to machine?
Reasonably — machinability is rated fair (48/100, better than 88% of stainless steel grades). Machines like 430/439 — use sharp positive-rake carbide, rigid setups, heavy feeds and generous coolant to avoid work-hardened glazing; expect ~55 % of AISI 1212 rates.
Can X2CrTi21-AW be welded?
Yes — weldability is rated very good (75/100). Excellent for GTAW/GMAW/laser/resistance welding without post-weld annealing thanks to Ti stabilization; keep heat input low and interpass < 150 °C to limit HAZ grain coarsening, use Ar (no N2) shielding and back purge.
What surface finishes work on X2CrTi21-AW?
Pickle and passivate after welding to restore the passive film; takes 2B/BA/No.4 mill finishes, buff polishing, electropolishing and PVD colour coatings — anodizing does not apply.
Can X2CrTi21-AW be formed, bent or molded?
Good deep drawing and roll forming with low springback and no ridging when fine-grained; avoid severe stretch forming (lower n-value than austenitics) and warm the tooling for very deep draws.
What is the maximum service temperature of X2CrTi21-AW?
X2CrTi21-AW is rated for continuous use to about 900°C (1,652 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between X2CrTi21 Annealed and X2CrTi21-AW?
Annealed is the default condition — standard stocked condition for sheet, strip, plate and bar — best formability and corrosion resistance. AW: reference condition for welded tube and fabricated assemblies — Ti stabilization keeps corrosion resistance, but HAZ grain growth cuts toughness. Yield strength is 300 MPa in Annealed versus 290 MPa in AW.
Sources
- EN 10088-1/-2 Stainless steels — list of grades and technical delivery conditions for sheet/plate/strip — CEN (2014)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.13B — Corrosion: Materials — ASM International (2005)
- Ti-stabilized 21Cr ferritic stainless (exhaust/appliance grade) datasheets — Outokumpu / Aperam / Baosteel (2023)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.