Stainless Steel S20433-ANN (Annealed)
Heat-treated state · default condition
UNS S20433
Default stock condition for deep drawing, bending, tube making and decorative sheet.
Values for the ANN condition
Other S20433 tempers and conditions
S20433 is listed in 7 conditions; see the grade overview at S20433.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
ANNDefaultThis page Annealed | Default stock condition for deep drawing, bending, tube making and decorative sheet. | 380 | 760 | 50 | 190 HB | — |
1/16 Hard | Slight temper roll for flatness and reduced stretcher strain in decorative sheet still needing forming. | 450 | 800 | 40 | 16 HRC | 2.5 % IACS |
Quarter hard | Higher strength with useful bending ductility; springs-back panels, brackets, light structural trim. | 560 | 900 | 25 | 25 HRC | 2.5 % IACS |
Cold drawn | Cold-drawn round bar and wire for fasteners, mesh and turned components at low material cost. | 700 | 950 | 20 | 22 HRC | 2.5 % IACS |
Half hard | Structural strip, clamps and formed sections where stiffness matters more than deep drawing. | 800 | 1,080 | 15 | 32 HRC | 2.4 % IACS |
Three-quarter hard | High-strength strip for clips, bands and lightly formed spring-like parts. | 970 | 1,250 | 10 | 37 HRC | 2.4 % IACS |
Full hard | Maximum strength flat strip for flat blanking, spring clips and stiffeners; essentially no formability. | 1,030 | 1,320 | 8 | 41 HRC | 2.4 % IACS |
What is S20433-ANN?
S20433-ANN is S20433 heat treated to ANN — default stock condition for deep drawing, bending, tube making and decorative sheet. S20433-ANN has a yield strength of 380 MPa (55.1 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 52% of stainless steel grades. Elongation at break is 50% and the elastic modulus is 197 GPa (28.6 Msi). S20433-ANN has a density of 7.8 g/cm³ (0.282 lb/in³), heavier than 50% of stainless steel grades. It melts at 1,400°C (2,552 °F).
Advantages
- Ductile — tolerates forming and impact — 50%, better than 90% of stainless steel grades
- Low embodied carbon — 3.6 kg CO₂/kg, better than 83% of stainless steel grades
- Forms and bends easily — 70/100, better than 79% of stainless steel grades
Limitations
- Needs corrosion protection — 38/100, worse than 95% of stainless steel grades
S20433-ANN properties
Typical room-temperature values for S20433-ANN; 11 are specific to this condition. Other listed values are S20433 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
S20433-ANN has a density of 7.8 g/cm³ (0.282 lb/in³), heavier than 50% of stainless steel grades. It melts at 1,400°C (2,552 °F).
Mechanical15
S20433-ANN has a yield strength of 380 MPa (55.1 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 52% of stainless steel grades. Elongation at break is 50% and the elastic modulus is 197 GPa (28.6 Msi).
Thermal6
S20433-ANN is rated for continuous service to 700°C (1,292 °F). It conducts heat at 16.2 W/m·K (9.36 BTU/hr·ft·°F), better than 64% of stainless steel grades. Thermal expansion is 16.9 µm/m·K (9.39 µin/in·°F).
Electrical3
S20433-ANN conducts electricity at 2.5 % IACS, better than 75% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is fair (38/100), worse than 95% of stainless steel grades.
Sustainability4
Producing a kilogram of S20433-ANN takes about 40 MJ of energy and emits 3.6 kg of CO₂ — less than 97% of stainless steel grades. Typical recycled content is 55%.
Manufacturability7
S20433-ANN's machinability is fair (35/100, better than 51% of stainless steel grades); weldability good (60/100); formability very good (70/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with S20433-ANN
Is S20433 easy to machine?
Work hardens very fast — use rigid setups, sharp positive-rake carbide, heavy positive feed, low-to-moderate speed and flood coolant; avoid dwelling or rubbing.
Can S20433 be welded?
GTAW/GMAW/resistance welding with 308L or 307/209 type filler; keep heat input low and interpass temperature down to limit sensitisation, Cu segregation and hot cracking, and pickle/passivate afterwards.
Can S20433 be formed, bent or molded?
Excellent deep drawing and roll forming in the annealed state but 20–30 % higher forming loads and more springback than 304; interstage anneal for severe multi-stage draws.
What surface finishes work on S20433?
Not anodisable; use pickling and passivation, No.4 brushed or mirror polishing, and add PVD/lacquer or paint for any outdoor exposure to prevent rust staining.
S20433 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 |
|---|---|---|
| Clean 200-series ceiling | ≤ 0.15 | 0.08 |
| Mnprincipal austenite stabiliser replacing Ni | 7.5 – 10.5 | 9 |
| Si | ≤ 1 | 0.5 |
| P | ≤ 0.06 | 0.04 |
| S | ≤ 0.03 | 0.01 |
| Crlower than 201/304 — main reason for reduced corrosion resistance | 13.5 – 15.5 | 14.5 |
| Nideliberately nickel-lean | 0.5 – 2.5 | 1.2 |
| Cuimproves cold formability, stabilises austenite | 1 – 3 | 2 |
| Nsolid-solution strengthening | 0.05 – 0.25 | 0.15 |
| Febalance; ranges are indicative for the S204xx lean Cr-Mn-Cu registration — confirm against the mill certificate / current ASTM A240 table | balance | — |
S20433-ANN — frequently asked
What is S20433-ANN used for?
S20433-ANN is typically used for structural framing, consumer goods and decorative trim. In short: most nickel-lean 201 variant; indoor or coated use; low machinability rating.
What is the yield strength of S20433-ANN?
S20433-ANN has a typical yield strength of 380 MPa (55.1 ksi) and a tensile strength of 760 MPa (110 ksi) — stronger than 52% of stainless steel grades. Strength varies by condition: see the 7 listed tempers.
Is S20433-ANN easy to machine?
Not especially — machinability is rated fair (35/100, better than 51% of stainless steel grades). Work hardens very fast — use rigid setups, sharp positive-rake carbide, heavy positive feed, low-to-moderate speed and flood coolant; avoid dwelling or rubbing.
Can S20433-ANN be welded?
Yes — weldability is rated good (60/100). GTAW/GMAW/resistance welding with 308L or 307/209 type filler; keep heat input low and interpass temperature down to limit sensitisation, Cu segregation and hot cracking, and pickle/passivate afterwards.
What surface finishes work on S20433-ANN?
Not anodisable; use pickling and passivation, No.4 brushed or mirror polishing, and add PVD/lacquer or paint for any outdoor exposure to prevent rust staining.
Can S20433-ANN be formed, bent or molded?
Excellent deep drawing and roll forming in the annealed state but 20–30 % higher forming loads and more springback than 304; interstage anneal for severe multi-stage draws.
What is the maximum service temperature of S20433-ANN?
S20433-ANN is rated for continuous use to about 700°C (1,292 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between S20433-ANN and S20433-FH?
ANN is the default condition — default stock condition for deep drawing, bending, tube making and decorative sheet. FH: maximum strength flat strip for flat blanking, spring clips and stiffeners; essentially no formability. Yield strength is 380 MPa in ANN versus 1,030 MPa in FH.
Sources
- ASTM A240/A240M — Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip — ASTM International (2023)
- ASTM A666 — Annealed or Cold-Worked Austenitic Stainless Steel Sheet, Strip, Plate and Flat Bar — ASTM International (2015)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys — ASM International (1990)
- SAE/ASTM Unified Numbering System for Metals and Alloys (UNS S204xx registrations) — SAE International (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.