Stainless Steel S43932
UNS S43932
S43932 (439 Type 2) is a dual Ti+Nb stabilized 18 % Cr ferritic stainless, a modification of Type 439 with a tighter stabilization ratio developed for improved weld-zone ductility in thin-wall exhaust parts.
Reference datasheet — S43932 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 ANN-2B condition
S43932 tempers and conditions
S43932 is supplied in 4 conditions, soft to hard. ANN-2B is the default FabDigit quotes; the values on this page are for it.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed, cold rolled 2D (dull matte) finish | Matte-annealed sheet for severe drawing where lubricant retention matters more than gloss. | 300 | 460 | 33 | 145 HB | 2.9 % IACS |
ANN-2BDefault Annealed, cold rolled 2B finish | Default stocked condition for exhaust and appliance stamping — softest, best formability and weldability. | 310 | 470 | 32 | 150 HB | — |
Temper rolled / skin passed | Light skin pass for flatness, stiffness and suppression of stretcher strain in roll-formed parts. | 370 | 500 | 25 | 168 HB | 2.9 % IACS |
Quarter hard | Rarely stocked; use where extra springback/stiffness is needed and bending is limited to gentle radii. | 460 | 560 | 12 | 13 HRC | 2.9 % IACS |
Supply forms, finishes and certifications
Ways S43932 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
AW-Tube | Welded tube, as-welded | Supply form |
BA | Bright annealed | Surface finish |
HRAP | Hot rolled, annealed and pickled | Surface finish |
What is S43932?
S43932 (439 Type 2) is a dual Ti+Nb stabilized 18 % Cr ferritic stainless, a modification of Type 439 with a tighter stabilization ratio developed for improved weld-zone ductility in thin-wall exhaust parts. It is used as annealed, bright-annealed, hot-rolled pickled, temper-rolled and welded-tube product with about 310 MPa yield, 470 MPa tensile, 32 % elongation and service to 815 °C. Stabilization gives excellent autogenous weldability (score 88) and good drawability (80) without post-weld annealing. Chloride corrosion resistance (46) is well below 304, and it is not a structural grade at temperature; S43940 is the closest variant. S43932 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). S43932 has a yield strength of 310 MPa (45 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 63% of stainless steel grades. Elongation at break is 32% and the elastic modulus is 200 GPa (29 Msi).
What is S43932 used for?
- exhaust manifolds
- catalytic converter shells
- mufflers
- flexible exhaust tubing
Advantages
- Forms and bends easily — 80/100, better than 93% of stainless steel grades
- Easy to machine — 52/100, better than 91% of stainless steel grades
- Readily welded — 88/100, better than 91% of stainless steel grades
- High electrical conductivity — 2.9 % IACS, better than 87% of stainless steel grades
- Conducts heat well — 24.5 W/m·K (14.2 BTU/hr·ft·°F), better than 85% of stainless steel grades
Limitations
- Needs corrosion protection — 46/100, worse than 82% of stainless steel grades
S43932 properties
Typical room-temperature values for S43932-ANN-2B; bars are the position among stainless steel grades.
Physical3
S43932 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).
Mechanical15
S43932 has a yield strength of 310 MPa (45 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 63% of stainless steel grades. Elongation at break is 32% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
S43932 is rated for continuous service to 815°C (1,499 °F). It conducts heat at 24.5 W/m·K (14.2 BTU/hr·ft·°F), better than 85% of stainless steel grades. Thermal expansion is 10.4 µm/m·K (5.78 µin/in·°F).
Electrical3
S43932 conducts electricity at 2.9 % IACS, better than 87% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is fair (46/100), worse than 82% of stainless steel grades.
Sustainability4
Producing a kilogram of S43932 takes about 42 MJ of energy and emits 4 kg of CO₂ — less than 95% of stainless steel grades. Typical recycled content is 70%.
Manufacturability7
S43932's machinability is fair (52/100, better than 91% of stainless steel grades); weldability excellent (88/100); 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. S43932 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with S43932
Is S43932 easy to machine?
Machines like 430 but slightly gummier — use sharp positive-rake carbide, rigid setup, heavy flood coolant and avoid dwelling to prevent work-hardened glaze.
Can S43932 be welded?
Excellent autogenous weldability (TIG/laser/HFI) thanks to Ti+Nb stabilization; use Ar or Ar-He (never N2-rich) shielding, low heat input to limit grain coarsening, filler ER430Nb/ER439 or 309L when joining to austenitics.
Can S43932 be formed, bent or molded?
Deep-drawable and roll-formable with low springback and no ridging/roping; allow generous bend radii (≥1t) and note lower r-value anisotropy than 409 but less stretch than 304.
S43932 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 |
|---|---|---|
| Cultra-low carbon | ≤ 0.03 | 0.02 |
| Mn | ≤ 1 | 0.4 |
| Si | ≤ 1 | 0.4 |
| P | ≤ 0.04 | 0.03 |
| S | ≤ 0.03 | 0 |
| Cr | 17 – 19 | 18 |
| Niresidual | ≤ 0.5 | 0.25 |
| N | ≤ 0.03 | 0.02 |
| Ti+NbTi+Nb ≥ 0.20 + 4(C+N); dual stabilization | 0.2 – 0.75 | 0.45 |
| Fe | balance |
What surface finishes work on S43932?
Passivate or electropolish after pickling; takes BA, No.4 and mirror finishes well and accepts aluminized/paint coatings — do not anodize.
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 S43932 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Also called
- 439HP
- Other
- 441
- Similar grades
- 439 Type 2
How much does S43932 cost?
S43932 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.
S43932 — frequently asked
What is S43932 used for?
S43932 is typically used for exhaust manifolds, catalytic converter shells, mufflers and flexible exhaust tubing. In short: weld-friendly ferritic exhaust grade; no sensitization after welding; 815 °C service, no nickel.
What is the yield strength of S43932?
S43932 has a typical yield strength of 310 MPa (45 ksi) and a tensile strength of 470 MPa (68.2 ksi) — weaker than 63% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is S43932 easy to machine?
Reasonably — machinability is rated fair (52/100, better than 91% of stainless steel grades). Machines like 430 but slightly gummier — use sharp positive-rake carbide, rigid setup, heavy flood coolant and avoid dwelling to prevent work-hardened glaze.
Can S43932 be welded?
Yes — weldability is rated excellent (88/100). Excellent autogenous weldability (TIG/laser/HFI) thanks to Ti+Nb stabilization; use Ar or Ar-He (never N2-rich) shielding, low heat input to limit grain coarsening, filler ER430Nb/ER439 or 309L when joining to austenitics.
What surface finishes work on S43932?
Passivate or electropolish after pickling; takes BA, No.4 and mirror finishes well and accepts aluminized/paint coatings — do not anodize.
Can S43932 be formed, bent or molded?
Deep-drawable and roll-formable with low springback and no ridging/roping; allow generous bend radii (≥1t) and note lower r-value anisotropy than 409 but less stretch than 304.
What is the maximum service temperature of S43932?
S43932 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.
What is the difference between S43932 ANN-2B and S43932-TR?
ANN-2B is the default condition — default stocked condition for exhaust and appliance stamping — softest, best formability and weldability. TR: light skin pass for flatness, stiffness and suppression of stretcher strain in roll-formed parts. Yield strength is 310 MPa in ANN-2B versus 370 MPa in TR.
How much does S43932 cost?
S43932 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
- ASTM A240/A240M — Chromium and Chromium-Nickel Stainless Steel Plate, Sheet and Strip — ASTM International (2023)
- ASTM A268/A268M — Seamless and Welded Ferritic Stainless Steel Tubing — ASTM International (2022)
- EN 10088-2 (grades 1.4509 / 1.4510 stabilized ferritics) — CEN (2014)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- Type 439 / 439HP ferritic stainless steel product data — Cleveland-Cliffs (AK Steel) (2021)
- Ferritic stainless steels for automotive exhaust (1.4509/1.4510) — 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.