Stainless Steel S20433
UNS S20433
S20433 is a further nickel-lean variant of the Type-201 Cr-Mn austenitic family, specified where material cost is prioritised over corrosion resistance relative to 304.
Reference datasheet — S20433 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 condition
S20433 tempers and conditions
S20433 is supplied in 7 conditions, soft to hard. ANN is the default FabDigit quotes; the values on this page are for it.
Compare all 7 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
ANNDefault 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 |
Supply forms, finishes and certifications
Ways S20433 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
HRAP | Hot Rolled, Annealed and Pickled plate | Surface finish |
What is S20433?
S20433 is a further nickel-lean variant of the Type-201 Cr-Mn austenitic family, specified where material cost is prioritised over corrosion resistance relative to 304. Annealed material gives 380 MPa yield, 760 MPa tensile, 50 % elongation and 190 HB (90 HRB) with service to 700 °C, in tempers from annealed and hot-rolled annealed-pickled through cold-drawn and full hard. Machinability is poor (rating 35) and outdoor corrosion resistance is limited, so exposed parts need coating. Step up to S20431 or 304 where durability or finish life matters. S20433 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). S20433 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).
What is S20433 used for?
- structural framing
- consumer goods
- decorative trim
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 properties
Typical room-temperature values for S20433-ANN; bars are the position among stainless steel grades.
Physical3
S20433 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 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 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 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 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'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. 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. S20433 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with S20433
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.
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 |
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.
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 S20433 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- Similar grades
- S20431
How much does S20433 cost?
S20433 is a budget-cost stainless steel ($), cheaper than about 90% 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.
S20433 — frequently asked
What is S20433 used for?
S20433 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?
S20433 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 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 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?
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 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?
S20433 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.
How much does S20433 cost?
S20433 is a budget-cost stainless steel ($), cheaper than about 90% 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 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; 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.