Stainless Steel 310L NAG
UNS S30600
310L NAG (UNS S30600) is a nitrogen-alloyed, low-carbon 25Cr-20Ni-type austenitic stainless containing roughly 4 % silicon, giving improved high-temperature strength and stabilized corrosion resistance for heat-treating equipment and nitric acid service.
Reference datasheet — 310L NAG 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
310L NAG tempers and conditions
310L NAG is supplied in 3 conditions, soft to hard. Annealed is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
AnnealedDefault solution annealed (~1050–1120 °C) + rapid quench | Standard supply condition for all product forms; maximum corrosion resistance in nitric acid service. | 305 | 620 | 48 | 165 HB | 1.9 % IACS |
As-welded deposit | Condition of field-welded joints; acceptable for most HNO₃ duty with matching filler, but weld metal corrodes faster than annealed base metal. | 330 | 590 | 30 | 180 HB | 1.9 % IACS |
Cold drawn | Bar for machined valve, pump and fastener parts in nitric acid plants; higher strength, lower ductility. | 560 | 760 | 25 | 20 HRC | 1.9 % IACS |
Supply forms, finishes and certifications
Ways 310L NAG is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
Welded-Tube-Annealed | Welded tube/pipe, bright annealed after welding | Supply form |
1D | Hot rolled, solution annealed, pickled plate | Surface finish |
2B | Cold rolled, annealed, pickled, lightly skin-passed sheet | Surface finish |
What is 310L NAG?
310L NAG (UNS S30600) is a nitrogen-alloyed, low-carbon 25Cr-20Ni-type austenitic stainless containing roughly 4 % silicon, giving improved high-temperature strength and stabilized corrosion resistance for heat-treating equipment and nitric acid service. Annealed material runs about 305 MPa yield, 620 MPa tensile, 48 % elongation and 165 HB (85 HRB), and is available as annealed plate, 1D and 2B sheet, cold-drawn bar and annealed welded tube. The silicon makes it abrasive and slow to machine and produces a Si-rich scale that must be pickled after hot work or welding; where nitric-acid resistance is not required, standard 310S is the simpler choice. 310L NAG has a density of 7.5 g/cm³ (0.271 lb/in³), lighter than 99% of stainless steel grades. It melts at 1,370°C (2,498 °F). 310L NAG has a yield strength of 305 MPa (44.2 ksi) and a tensile strength of 620 MPa (89.9 ksi) — weaker than 66% of stainless steel grades. Elongation at break is 48% and the elastic modulus is 193 GPa (28 Msi).
What is 310L NAG used for?
- furnace muffles
- radiant tubes
- heat-treatment fixtures
Advantages
- Forms and bends easily — 75/100, better than 87% of stainless steel grades
- Tough — resists crack growth — 200 MPa·√m (182 ksi·√in), better than 86% of stainless steel grades
- Ductile — tolerates forming and impact — 48%, better than 85% of stainless steel grades
- Good corrosion resistance — 78/100, better than 84% of stainless steel grades
Limitations
- Poor heat conductor — 13 W/m·K (7.51 BTU/hr·ft·°F), worse than 85% of stainless steel grades
- Low electrical conductivity — 1.9 % IACS, worse than 84% of stainless steel grades
310L NAG properties
Typical room-temperature values for 310L NAG-Annealed; bars are the position among stainless steel grades.
Physical3
310L NAG has a density of 7.5 g/cm³ (0.271 lb/in³), lighter than 99% of stainless steel grades. It melts at 1,370°C (2,498 °F).
Mechanical16
310L NAG has a yield strength of 305 MPa (44.2 ksi) and a tensile strength of 620 MPa (89.9 ksi) — weaker than 66% of stainless steel grades. Elongation at break is 48% and the elastic modulus is 193 GPa (28 Msi).
Thermal6
310L NAG is rated for continuous service to 600°C (1,112 °F). It conducts heat at 13 W/m·K (7.51 BTU/hr·ft·°F), worse than 85% of stainless steel grades. Thermal expansion is 15.7 µm/m·K (8.72 µin/in·°F).
Electrical3
310L NAG conducts electricity at 1.9 % IACS, worse than 84% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is very good (78/100), better than 84% of stainless steel grades.
Sustainability4
Producing a kilogram of 310L NAG takes about 57 MJ of energy and emits 5.2 kg of CO₂ — more than 62% of stainless steel grades. Typical recycled content is 55%.
Manufacturability7
310L NAG's machinability is poor (30/100, worse than 70% of stainless steel grades); weldability very good (70/100); formability very good (75/100).
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. 310L NAG is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 310L NAG
Is 310L NAG easy to machine?
Slow, abrasive cutting: the ~4 % Si and strong work hardening demand rigid setups, positive-rake carbide/coated inserts, heavy flood coolant, low speed and constant feed to avoid glazing.
Can 310L NAG be welded?
GTAW/GMAW/SMAW with matching high-Si (S30600-type) filler; keep heat input and interpass temperature low, no preheat, and solution-anneal or use matching filler when full nitric-acid resistance across the weld is required.
Can 310L NAG be formed, bent or molded?
Cold forms like an austenitic 300 series but with higher springback and work-hardening; hot work 1150–900 °C followed by solution anneal at 1050–1120 °C and rapid quench — avoid slow cooling through 550–850 °C.
310L NAG 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 | ≤ 0.02 | 0.01 |
| Sikey alloying addition for nitric-acid passivity | 3.7 – 4.3 | 4 |
| Mn | ≤ 2 | 1 |
| P | ≤ 0.02 | 0.02 |
| S | ≤ 0.02 | 0 |
| Cr | 17 – 18.5 | 17.8 |
| Ni | 14 – 15.5 | 14.8 |
| Mo | ≤ 0.2 | 0.1 |
| Fe | balance |
What surface finishes work on 310L NAG?
Pickle (HNO₃-HF) and passivate after hot work or welding to remove Si-rich scale; electropolishing gives the cleanest surface for acid service. Not anodizable.
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 310L NAG in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- S30600
How much does 310L NAG cost?
310L NAG is a high-cost stainless steel ($$$$), pricier than about 78% 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.
310L NAG — frequently asked
What is 310L NAG used for?
310L NAG is typically used for furnace muffles, radiant tubes and heat-treatment fixtures. In short: high-silicon nitric-acid stainless; low-carbon 310-type; stabilised weld-zone corrosion resistance.
What is the yield strength of 310L NAG?
310L NAG has a typical yield strength of 305 MPa (44.2 ksi) and a tensile strength of 620 MPa (89.9 ksi) — weaker than 66% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is 310L NAG easy to machine?
Not especially — machinability is rated poor (30/100, worse than 70% of stainless steel grades). Slow, abrasive cutting: the ~4 % Si and strong work hardening demand rigid setups, positive-rake carbide/coated inserts, heavy flood coolant, low speed and constant feed to avoid glazing.
Can 310L NAG be welded?
Yes — weldability is rated very good (70/100). GTAW/GMAW/SMAW with matching high-Si (S30600-type) filler; keep heat input and interpass temperature low, no preheat, and solution-anneal or use matching filler when full nitric-acid resistance across the weld is required.
What surface finishes work on 310L NAG?
Pickle (HNO₃-HF) and passivate after hot work or welding to remove Si-rich scale; electropolishing gives the cleanest surface for acid service. Not anodizable.
Can 310L NAG be formed, bent or molded?
Cold forms like an austenitic 300 series but with higher springback and work-hardening; hot work 1150–900 °C followed by solution anneal at 1050–1120 °C and rapid quench — avoid slow cooling through 550–850 °C.
What is the maximum service temperature of 310L NAG?
310L NAG is rated for continuous use to about 600°C (1,112 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 310L NAG Annealed and 310L NAG-CD?
Annealed is the default condition — standard supply condition for all product forms; maximum corrosion resistance in nitric acid service. CD: bar for machined valve, pump and fastener parts in nitric acid plants; higher strength, lower ductility. Yield strength is 305 MPa in Annealed versus 560 MPa in CD.
How much does 310L NAG cost?
310L NAG is a high-cost stainless steel ($$$$), pricier than about 78% 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 S30600) — ASTM International (2023)
- ASTM A479/A479M — Stainless Steel Bars and Shapes for Boilers and Pressure Vessels — ASTM International (2021)
- Alloy 306 / 310L NAG high-silicon austenitic stainless steel for nitric acid service — Industeel (ArcelorMittal) (2020)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials (nitric acid service) — ASM International (2005)
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.