Stainless Steel 1.4621
EN 1.4621
1.4621 (X2CrNbCu21) is a low-carbon 21% Cr ferritic stainless stabilized with niobium and alloyed with copper for improved deep-drawability and general corrosion resistance.
Reference datasheet — 1.4621 is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the CR-2B condition
1.4621 tempers and conditions
1.4621 is supplied in 5 conditions, soft to hard. CR-2B is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Hot Rolled, Annealed and Pickled | Heavier gauges (>3 mm) for tank shells, flanges and welded fabrications where surface finish is secondary. | 285 | 455 | 28 | 160 HB | — |
Bright Annealed | Pick when a reflective as-delivered surface is needed without mechanical polishing (appliance panels, water-tank liners). | 295 | 460 | 31 | 160 HB | 2.9 % IACS |
CR-2BDefault Cold Rolled, Annealed and Pickled | Standard stocked condition for tanks, exhaust parts and drawn components — best surface and highest drawability. | 300 | 470 | 30 | 165 HB | — |
Hot Rolled, Not Annealed / Black | Mill-edge intermediate product for re-rolling or for parts that will be annealed and descaled after forming. | 310 | 480 | 25 | 175 HB | 2.9 % IACS |
Cold Rolled, Skin-passed / Temper Rolled | Use where flatness and higher yield are wanted and only mild forming (roll forming, bending) follows. | 420 | 530 | 15 | 190 HB | 2.9 % IACS |
What is 1.4621?
1.4621 (X2CrNbCu21) is a low-carbon 21% Cr ferritic stainless stabilized with niobium and alloyed with copper for improved deep-drawability and general corrosion resistance. It is chosen where 430 corrosion performance is marginal but austenitic nickel content is not wanted, and is supplied as cold-rolled sheet and strip (2B, 2R, special polish) and hot-rolled plate (1D, 1U). Typical properties are 300 MPa yield, 470 MPa tensile, 30% elongation and 165 HB (85 HRB), with service to 950 °C. Low-temperature toughness and chloride pitting resistance (corrosion score 62) remain below 304/316; 1.4509 (441) is the nearest alternative. 1.4621 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). 1.4621 has a yield strength of 300 MPa (43.5 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 68% of stainless steel grades. Elongation at break is 30% and the elastic modulus is 220 GPa (31.9 Msi).
What is 1.4621 used for?
- architectural trim
- kitchen equipment
- automotive trim
- appliance panels
Advantages
- Low embodied carbon — 3.2 kg CO₂/kg, better than 95% of stainless steel grades
- Easy to machine — 55/100, better than 94% of stainless steel grades
- Forms and bends easily — 80/100, better than 93% of stainless steel grades
- High electrical conductivity — 2.9 % IACS, better than 87% of stainless steel grades
- High service temperature — 950°C (1,742 °F), better than 86% of stainless steel grades
1.4621 properties
Typical room-temperature values for 1.4621-CR-2B; bars are the position among stainless steel grades.
Physical3
1.4621 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).
Mechanical15
1.4621 has a yield strength of 300 MPa (43.5 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 68% of stainless steel grades. Elongation at break is 30% and the elastic modulus is 220 GPa (31.9 Msi).
Thermal6
1.4621 is rated for continuous service to 950°C (1,742 °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
1.4621 conducts electricity at 2.9 % IACS, better than 87% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (62/100), worse than 52% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4621 takes about 45 MJ of energy and emits 3.2 kg of CO₂ — less than 91% of stainless steel grades. Typical recycled content is 65%.
Manufacturability7
1.4621's machinability is good (55/100, better than 94% of stainless steel grades); weldability very good (80/100); formability very good (80/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the stainless steel family
Yield strength against density for every stainless steel grade FabDigit runs. 1.4621 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4621
Is 1.4621 easy to machine?
Machines like a soft ferritic stainless — use sharp positive-rake carbide, rigid setup, high feed and generous flood coolant to avoid built-up edge and work-hardened skins.
Can 1.4621 be welded?
Weldable by TIG/MIG/laser/resistance without post-weld annealing thanks to Nb stabilization; use low heat input and Ar (or Ar+He) shielding with back purging, and matching 1.4621/430Nb or austenitic 309L/316L filler where extra toughness is required.
Can 1.4621 be formed, bent or molded?
Excellent deep-drawing and stretch-forming behaviour (high r-value from the Nb+Cu chemistry); allow more springback than austenitics, avoid sharp bend radii below 1t in heavy gauge, and watch ridging/roping on wide drawn panels.
1.4621 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 carbon for ferritic ductility | ≤ 0.03 | 0.02 |
| Si | ≤ 1 | 0.4 |
| Mn | ≤ 1 | 0.4 |
| P | ≤ 0.04 | 0.03 |
| S | ≤ 0.02 | 0 |
| Cr | 20 – 21.5 | 21 |
| Cuimproves drawability and general corrosion resistance | 0.3 – 0.8 | 0.5 |
| Nbstabilizer for C and N | 0.3 – 0.6 | 0.45 |
| N | ≤ 0.03 | 0.02 |
| Fe | balance |
What surface finishes work on 1.4621?
Pickle and passivate after hot work or welding to restore the chromium oxide film; takes brushed, 2B, BA and bright-polished finishes well, and can be electropolished — not anodizable.
Surface treatments FabDigit runs on stainless steel parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Passivation
Organic Coating
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Stainless Steel 1.4621 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- X2CrNbCu21
How much does 1.4621 cost?
1.4621 is a standard-cost stainless steel ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
1.4621 — frequently asked
What is 1.4621 used for?
1.4621 is typically used for architectural trim, kitchen equipment, automotive trim and appliance panels. In short: deep-drawing ferritic grade; nickel-free 304 substitute; welds without post-weld anneal.
What is the yield strength of 1.4621?
1.4621 has a typical yield strength of 300 MPa (43.5 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 68% of stainless steel grades. Strength varies by condition: see the 5 listed tempers.
Is 1.4621 easy to machine?
Reasonably — machinability is rated good (55/100, better than 94% of stainless steel grades). Machines like a soft ferritic stainless — use sharp positive-rake carbide, rigid setup, high feed and generous flood coolant to avoid built-up edge and work-hardened skins.
Can 1.4621 be welded?
Yes — weldability is rated very good (80/100). Weldable by TIG/MIG/laser/resistance without post-weld annealing thanks to Nb stabilization; use low heat input and Ar (or Ar+He) shielding with back purging, and matching 1.4621/430Nb or austenitic 309L/316L filler where extra toughness is required.
What surface finishes work on 1.4621?
Pickle and passivate after hot work or welding to restore the chromium oxide film; takes brushed, 2B, BA and bright-polished finishes well, and can be electropolished — not anodizable.
Can 1.4621 be formed, bent or molded?
Excellent deep-drawing and stretch-forming behaviour (high r-value from the Nb+Cu chemistry); allow more springback than austenitics, avoid sharp bend radii below 1t in heavy gauge, and watch ridging/roping on wide drawn panels.
What is the maximum service temperature of 1.4621?
1.4621 is rated for continuous use to about 950°C (1,742 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 1.4621 CR-2B and 1.4621 CR-SP?
CR-2B is the default condition — standard stocked condition for tanks, exhaust parts and drawn components — best surface and highest drawability. CR-SP: use where flatness and higher yield are wanted and only mild forming (roll forming, bending) follows. Yield strength is 300 MPa in CR-2B versus 420 MPa in CR-SP.
How much does 1.4621 cost?
1.4621 is a standard-cost stainless steel ($$), cheaper than about 71% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- EN 10088-2: Stainless steels — Technical delivery conditions for sheet/plate and strip for general purposes — CEN (2014)
- EN 10088-1: Stainless steels — List of stainless steels (chemical and physical data) — CEN (2014)
- ASM Handbook Vol. 1: Properties and Selection — Irons, Steels and High-Performance Alloys — ASM International (1990)
- Ferritic stainless steel programme — 21 % Cr Nb/Cu stabilized grades for exhaust and hot-water applications — Outokumpu / Aperam (2022)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.