Stainless Steel 1.4621 CR-2B
Finish state · default condition
EN 1.4621
CR-2B = cold Rolled, Annealed and Pickled
Standard stocked condition for tanks, exhaust parts and drawn components — best surface and highest drawability.
Values for the CR-2B condition
Other 1.4621 tempers and conditions
1.4621 is listed in 5 conditions; see the grade overview at 1.4621.
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-2BDefaultThis page 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 CR-2B?
1.4621 CR-2B is 1.4621 supplied in the CR-2B condition — standard stocked condition for tanks, exhaust parts and drawn components — best surface and highest drawability. 1.4621 CR-2B 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). 1.4621 CR-2B 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).
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 CR-2B properties
Typical room-temperature values for 1.4621 CR-2B; 14 are specific to this condition. Other listed values are 1.4621 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4621 CR-2B 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 CR-2B 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 CR-2B 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 CR-2B 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 CR-2B 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 CR-2B'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. Confirm any required mill or lot documentation when quoting.
Working with 1.4621 CR-2B
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.
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.
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 | — |
1.4621 CR-2B — frequently asked
What is 1.4621 CR-2B used for?
1.4621 CR-2B 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 CR-2B?
1.4621 CR-2B 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 CR-2B 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 CR-2B 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 CR-2B?
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 CR-2B 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 CR-2B?
1.4621 CR-2B 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.
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. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.