Stainless Steel S43037 Annealed 2B
Finish state · default condition
UNS S43037
Annealed 2B = cold rolled, annealed, pickled and skin-passed
Pick the default cold rolled, annealed, pickled and skin-passed sheet or coil for exhaust parts and appliance liners, giving the best balance of forming (78) and welding (82).
Values for the Annealed 2B condition
Other S43037 tempers and conditions
S43037 is listed in 5 conditions; see the grade overview at S43037.
- Annealed 2D
- Annealed 2B
- As Welded
- Temper Rolled
- 1/4H
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Cold rolled, annealed and pickled, dull matte finish | Choose the dull matte cold rolled, annealed and pickled finish for deep drawing, where lubricant retention limits galling and elongation reaches 32% at 275 MPa yield. | 275 | 470 | 32 | 145 HB | 2.9 % IACS |
Annealed 2BDefaultThis page Cold rolled, annealed, pickled and skin-passed | Pick the default cold rolled, annealed, pickled and skin-passed sheet or coil for exhaust parts and appliance liners, giving the best balance of forming (78) and welding (82). | 285 | 480 | 30 | 150 HB | — |
As-welded (no post-weld heat treatment) | Use when Ti/Nb stabilization allows service straight from the weld without sensitization risk; accept weld grain coarsening that limits elongation to 18% and lowers impact toughness. | 290 | 470 | 18 | 155 HB | 2.9 % IACS |
Temper rolled / skin-passed (light cold work, ~1/8 hard) | Choose the lightly cold-rolled, skin-passed state (about 1/8 hard) when higher stiffness and flatness are needed but parts must still bend; yield rises to 420 MPa, elongation falls to 18%. | 420 | 540 | 18 | 185 HB | 2.9 % IACS |
Quarter hard | Choose for spring clips and clamps that need the higher 520 MPa yield but only small-deformation bends; quarter-hard cold rolling cuts elongation to 10% and formability. | 520 | 620 | 10 | 17 HRC | 2.9 % IACS |
What is S43037 Annealed 2B?
S43037 Annealed 2B is S43037 supplied in the Annealed 2B condition — pick the default cold rolled, annealed, pickled and skin-passed sheet or coil for exhaust parts and appliance liners, giving the best balance of forming (78) and welding (82). S43037 Annealed 2B has a yield strength of 285 MPa (41.3 ksi) and a tensile strength of 480 MPa (69.6 ksi) — weaker than 74% of stainless steel grades. Elongation at break is 30% and the elastic modulus is 200 GPa (29 Msi). S43037 Annealed 2B has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,425°C (2,597 °F).
Advantages
- Low embodied carbon — 3.4 kg CO₂/kg, better than 91% of stainless steel grades
- Forms and bends easily — 78/100, better than 90% of stainless steel grades
- High electrical conductivity — 2.9 % IACS, better than 87% of stainless steel grades
- Easy to machine — 45/100, better than 84% of stainless steel grades
- Readily welded — 82/100, better than 84% of stainless steel grades
Limitations
- Low fracture toughness — 70 MPa·√m (63.7 ksi·√in), worse than 83% of stainless steel grades
S43037 Annealed 2B properties
Typical room-temperature values for S43037 Annealed 2B; 10 are specific to this condition. Other listed values are S43037 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
S43037 Annealed 2B has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,425°C (2,597 °F).
Mechanical16
S43037 Annealed 2B has a yield strength of 285 MPa (41.3 ksi) and a tensile strength of 480 MPa (69.6 ksi) — weaker than 74% of stainless steel grades. Elongation at break is 30% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
S43037 Annealed 2B is rated for continuous service to 815°C (1,499 °F). It conducts heat at 24.2 W/m·K (14 BTU/hr·ft·°F), better than 83% of stainless steel grades. Thermal expansion is 10.4 µm/m·K (5.78 µin/in·°F).
Electrical3
S43037 Annealed 2B conducts electricity at 2.9 % IACS, better than 87% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (55/100), worse than 71% of stainless steel grades.
Sustainability4
Producing a kilogram of S43037 Annealed 2B takes about 43 MJ of energy and emits 3.4 kg of CO₂ — less than 94% of stainless steel grades. Typical recycled content is 60%.
Manufacturability8
S43037 Annealed 2B's machinability is fair (45/100, better than 84% of stainless steel grades); weldability very good (82/100); formability very good (78/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with S43037 Annealed 2B
Is S43037 easy to machine?
Machinability is slightly better than 304 but the chips still smear onto the tool: use sharp positive-rake tooling, high feed and plenty of emulsion coolant, and control depth of cut to limit the work-hardened layer and burr formation.
Can S43037 be welded?
GTAW, GMAW, laser and high-frequency welding all work, and the Ti/Nb stabilization means no post-weld anneal is needed in the as-welded condition. Use low heat input with 409Nb/439 or 308L/430LNb type filler, pure argon shielding, and avoid nitrogen-bearing gases that cause coarse-grain embrittlement of the weld.
Can S43037 be formed, bent or molded?
Cold bending, roll forming and stretch forming are good (high r-value), but allow for anisotropy and ridging/roping on drawn surfaces. Keep bend radius ≥1t and avoid heavy deformation followed by long high-temperature exposure, which coarsens the grain.
What surface finishes work on S43037?
2B and BA rolled finishes, mechanical polishing, electropolishing and passivation all apply. The grade cannot be anodized; use chemical coloring or PVD for decorative shades, and always passivate after pickling to restore the passive film.
S43037 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, matched to stabilization | ≤ 0.03 | 0.02 |
| Si | ≤ 1 | 0.4 |
| Mn | ≤ 1 | 0.4 |
| P | ≤ 0.04 | 0.03 |
| S | ≤ 0.03 | 0 |
| Cr17–18% Cr class (439 family) | 17 – 19 | 17.5 |
| Niresidual | ≤ 0.5 | 0.25 |
| Timain stabilizer, usually Ti ≥ 0.20+4(C+N) | 0.15 – 0.5 | 0.25 |
| Nbsome modified types use Ti+Nb dual stabilization for weld toughness | ≤ 0.5 | 0.15 |
| Aldeoxidation residual | ≤ 0.15 | 0.03 |
| N | ≤ 0.03 | 0.02 |
| Fe | balance | — |
S43037 Annealed 2B — frequently asked
What is S43037 Annealed 2B used for?
S43037 Annealed 2B is typically used for exhaust systems, appliance trim and heat exchanger housings. In short: most weldable ferritic stainless; stabilized 430 upgrade; 815 °C exhaust grade.
What is the yield strength of S43037 Annealed 2B?
S43037 Annealed 2B has a typical yield strength of 285 MPa (41.3 ksi) and a tensile strength of 480 MPa (69.6 ksi) — weaker than 74% of stainless steel grades. Strength varies by condition: see the 5 listed tempers.
Is S43037 Annealed 2B easy to machine?
Reasonably — machinability is rated fair (45/100, better than 84% of stainless steel grades). Machinability is slightly better than 304 but the chips still smear onto the tool: use sharp positive-rake tooling, high feed and plenty of emulsion coolant, and control depth of cut to limit the work-hardened layer and burr formation.
Can S43037 Annealed 2B be welded?
Yes — weldability is rated very good (82/100). GTAW, GMAW, laser and high-frequency welding all work, and the Ti/Nb stabilization means no post-weld anneal is needed in the as-welded condition. Use low heat input with 409Nb/439 or 308L/430LNb type filler, pure argon shielding, and avoid nitrogen-bearing gases that cause coarse-grain embrittlement of the weld.
What surface finishes work on S43037 Annealed 2B?
2B and BA rolled finishes, mechanical polishing, electropolishing and passivation all apply. The grade cannot be anodized; use chemical coloring or PVD for decorative shades, and always passivate after pickling to restore the passive film.
Can S43037 Annealed 2B be formed, bent or molded?
Cold bending, roll forming and stretch forming are good (high r-value), but allow for anisotropy and ridging/roping on drawn surfaces. Keep bend radius ≥1t and avoid heavy deformation followed by long high-temperature exposure, which coarsens the grain.
What is the maximum service temperature of S43037 Annealed 2B?
S43037 Annealed 2B is rated for continuous use to about 815°C (1,499 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Sources
- ASTM A240/A240M — Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip — ASTM International (2023)
- ASTM A268/A268M — Seamless and Welded Ferritic/Martensitic Stainless Steel Tubing — ASTM International (2022)
- ASTM A959 / SAE-AISI UNS designation system for stainless steels — ASTM International (2022)
- GB/T 3280 (022Cr17Ti / 022Cr17NbTi ) (2015)
- ASM Specialty Handbook: Stainless Steels — ASM International (1994)
- Type 439 / 439HP ferritic stainless steel product data — AK Steel / Cleveland-Cliffs (2020)
- Ferritic stainless steels for automotive exhaust (441/439/436) — Outokumpu (2021)
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.