Stainless Steel Nitronic 32
UNS S24100
Nitronic 32 (S24100) is a manganese- and nitrogen-strengthened austenitic stainless in which Mn and N replace much of the nickel used in the 300 series.
Reference datasheet — Nitronic 32 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 Annealed condition
Nitronic 32 tempers and conditions
Nitronic 32 is supplied in 6 conditions, soft to hard. Annealed is the default FabDigit quotes; the values on this page are for it.
Compare all 6 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AnnealedDefault solution annealed ~1065 °C, water quenched | Standard stocked condition for sheet, plate and bar; best ductility, corrosion resistance and formability. | 415 | 830 | 48 | 220 HB | — |
Quarter hard | Light cold-rolled temper for parts needing extra strength while still allowing moderate bending. | 690 | 965 | 25 | 30 HRC | 2.3 % IACS |
annealed then cold drawn bar/wire (light draft) | Choose for straight, close-tolerance bar with a strength bump over annealed; typical for shafts and fasteners. | 760 | 1,000 | 25 | 31 HRC | 2.3 % IACS |
Half hard | Mid cold-rolled temper for stamped structural parts, clamps and springy brackets. | 860 | 1,105 | 18 | 34 HRC | 2.3 % IACS |
Three-quarter hard | High-strength strip temper for flat springs, shims and wear strips with only gentle forming. | 1,035 | 1,240 | 12 | 38 HRC | 2.3 % IACS |
heavily cold rolled strip/sheet | Maximum as-rolled strength and wear resistance; essentially flat-form only, very limited bending. | 1,210 | 1,380 | 8 | 42 HRC | 2.3 % IACS |
What is Nitronic 32?
Nitronic 32 (S24100) is a manganese- and nitrogen-strengthened austenitic stainless in which Mn and N replace much of the nickel used in the 300 series. Engineers select it where high strength and lower alloy cost matter together: annealed material reaches 415 MPa yield and 830 MPa tensile with 48 % elongation and about 220 HB, and it is supplied annealed, cold drawn and in 1/4, 1/2, 3/4 and full hard tempers as bar, wire and strip. Corrosion resistance (score 55) sits below 304, so it is not a chloride-service grade; 304 or 316 are the alternatives where pitting resistance governs. Nitronic 32 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). Nitronic 32 has a yield strength of 415 MPa (60.2 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 62% of stainless steel grades. Elongation at break is 48% and the elastic modulus is 197 GPa (28.6 Msi).
What is Nitronic 32 used for?
- fasteners
- structural components
- cryogenic equipment
- high-strength tie rods
Advantages
- Ductile — tolerates forming and impact — 48%, better than 85% of stainless steel grades
Nitronic 32 properties
Typical room-temperature values for Nitronic 32-Annealed; bars are the position among stainless steel grades.
Physical3
Nitronic 32 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).
Mechanical13
Nitronic 32 has a yield strength of 415 MPa (60.2 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 62% of stainless steel grades. Elongation at break is 48% and the elastic modulus is 197 GPa (28.6 Msi).
Thermal6
Nitronic 32 is rated for continuous service to 760°C (1,400 °F). It conducts heat at 14.5 W/m·K (8.38 BTU/hr·ft·°F), worse than 72% of stainless steel grades. Thermal expansion is 15.5 µm/m·K (8.61 µin/in·°F).
Electrical3
Nitronic 32 conducts electricity at 2.3 % IACS, better than 55% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (55/100), worse than 71% of stainless steel grades.
Sustainability4
Producing a kilogram of Nitronic 32 takes about 45 MJ of energy and emits 4.2 kg of CO₂ — less than 91% of stainless steel grades. Typical recycled content is 70%.
Manufacturability7
Nitronic 32's machinability is poor (32/100, worse than 62% of stainless steel grades); weldability very good (75/100); formability good (65/100).
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. Nitronic 32 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Nitronic 32
Is Nitronic 32 easy to machine?
Treat like a high-work-hardening austenitic: rigid setups, sharp positive-rake carbide, heavy positive feeds, slow speeds (~60–70 % of 304) and flood coolant to avoid glazing.
Can Nitronic 32 be welded?
Readily welded by GTAW/GMAW/SMAW without preheat or post-weld heat treatment; use over-alloyed austenitic filler such as 209, 240 or 308L/309L and keep interpass temperature low.
Can Nitronic 32 be formed, bent or molded?
Cold forms well but needs ~2× the press load of 304 and generous bend radii with springback allowance; hot work 1150–1230 °C and finish above ~950 °C, then solution anneal ~1040–1090 °C and quench.
Nitronic 32 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 |
|---|---|---|
| C | ≤ 0.15 | 0.06 |
| Mnprimary austenite stabiliser replacing Ni | 11 – 14 | 12 |
| Si | ≤ 1 | 0.5 |
| P | ≤ 0.06 | |
| S | ≤ 0.03 | |
| Cr | 16.5 – 19 | 17.75 |
| Ni | 0.5 – 2.5 | 1.6 |
| Nsolid-solution strengthener | 0.2 – 0.45 | 0.3 |
| Fe | balance |
What surface finishes work on Nitronic 32?
Passivate per ASTM A967 or electropolish for best corrosion performance; polishes to a bright finish, and hard chrome or nitriding can be added for extreme wear duty.
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 Nitronic 32 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- S24100
How much does Nitronic 32 cost?
Nitronic 32 is a premium-cost stainless steel ($$$), cheaper than about 51% 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.
Nitronic 32 — frequently asked
What is Nitronic 32 used for?
Nitronic 32 is typically used for fasteners, structural components, cryogenic equipment and high-strength tie rods. In short: low-nickel 300-series substitute; double 304 yield strength; corrosion below 304.
What is the yield strength of Nitronic 32?
Nitronic 32 has a typical yield strength of 415 MPa (60.2 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 62% of stainless steel grades. Strength varies by condition: see the 6 listed tempers.
Is Nitronic 32 easy to machine?
Not especially — machinability is rated poor (32/100, worse than 62% of stainless steel grades). Treat like a high-work-hardening austenitic: rigid setups, sharp positive-rake carbide, heavy positive feeds, slow speeds (~60–70 % of 304) and flood coolant to avoid glazing.
Can Nitronic 32 be welded?
Yes — weldability is rated very good (75/100). Readily welded by GTAW/GMAW/SMAW without preheat or post-weld heat treatment; use over-alloyed austenitic filler such as 209, 240 or 308L/309L and keep interpass temperature low.
What surface finishes work on Nitronic 32?
Passivate per ASTM A967 or electropolish for best corrosion performance; polishes to a bright finish, and hard chrome or nitriding can be added for extreme wear duty.
Can Nitronic 32 be formed, bent or molded?
Cold forms well but needs ~2× the press load of 304 and generous bend radii with springback allowance; hot work 1150–1230 °C and finish above ~950 °C, then solution anneal ~1040–1090 °C and quench.
What is the maximum service temperature of Nitronic 32?
Nitronic 32 is rated for continuous use to about 760°C (1,400 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does Nitronic 32 cost?
Nitronic 32 is a premium-cost stainless steel ($$$), cheaper than about 51% 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 (UNS S24100) — ASTM International (2023)
- ASTM A276/A276M — Stainless Steel Bars and Shapes — ASTM International (2023)
- Nitronic 32 (S24100) high-manganese austenitic stainless alloy data — Armco/AK Steel — Nitronic alloy series (2015)
- ASM Handbook Vol. 1: Properties and Selection — Irons, Steels, and High-Performance Alloys — ASM International (1990)
- UNS S24100 alloy property summary — SAE/ASTM Unified Numbering System (2020)
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.