Stainless Steel SUS890L
JIS SUS890L · UNS S31254
SUS890L is a JIS super-austenitic stainless comparable to 904L, using high nickel plus molybdenum and low carbon for resistance to sulfuric and phosphoric acids as well as chlorides.
Reference datasheet — SUS890L 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
SUS890L tempers and conditions
SUS890L 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 Annealed (solution treated ~1100–1150 °C, water quenched) | Standard stocked condition for plate, sheet, tube and bar — maximum corrosion resistance and ductility. | 260 | 590 | 45 | 160 HB | 1.7 % IACS |
Quarter hard | Light cold work when higher yield strength is needed but some forming ductility must remain. | 520 | 760 | 22 | 22 HRC | 1.7 % IACS |
Half hard | Higher-strength strip/wire for springs, clamps and stressed components in corrosive service. | 700 | 900 | 14 | 28 HRC | 1.7 % IACS |
Supply forms, finishes and certifications
Ways SUS890L is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
Annealed Tube | Seamless / welded tube, solution annealed and pickled | Supply form |
Cold Drawn Bar | Cold drawn / cold finished bar | Supply form |
Hot Rolled Annealed Plate | Hot rolled, solution annealed and pickled plate | Supply form |
Cold Rolled 2B | Cold rolled, annealed, pickled and skin-passed sheet | Surface finish |
What is SUS890L?
SUS890L is a JIS super-austenitic stainless comparable to 904L, using high nickel plus molybdenum and low carbon for resistance to sulfuric and phosphoric acids as well as chlorides. It is chosen where 316L suffers general corrosion or stress-corrosion cracking, and is available as annealed and hot-rolled annealed plate, cold-rolled 2B sheet, cold-drawn bar, quarter- and half-hard strip and annealed tube. Annealed properties are 260 MPa yield, 590 MPa tensile and 45 % elongation, with a maximum service temperature of 400 °C. Alloy cost and poor machinability are the main limits; SUS836L is the cheaper high-Mo option when only chloride pitting matters. SUS890L has a density of 7.98 g/cm³ (0.288 lb/in³), heavier than 85% of stainless steel grades. It melts at 1,320°C (2,408 °F). SUS890L has a yield strength of 260 MPa (37.7 ksi) and a tensile strength of 590 MPa (85.6 ksi) — weaker than 84% of stainless steel grades. Elongation at break is 45% and the elastic modulus is 195 GPa (28.3 Msi).
What is SUS890L used for?
- acid processing equipment
- marine components
- flue-gas desulfurization
Advantages
- Good corrosion resistance — 86/100, better than 94% of stainless steel grades
- Tough — resists crack growth — 200 MPa·√m (182 ksi·√in), better than 86% of stainless steel grades
- Forms and bends easily — 72/100, better than 84% of stainless steel grades
- Ductile — tolerates forming and impact — 45%, better than 76% of stainless steel grades
Limitations
- Poor heat conductor — 12 W/m·K (6.93 BTU/hr·ft·°F), worse than 93% of stainless steel grades
- Low electrical conductivity — 1.7 % IACS, worse than 93% of stainless steel grades
- Low strength — 260 MPa (37.7 ksi), worse than 84% of stainless steel grades
- High embodied carbon — 5.6 kg CO₂/kg, worse than 83% of stainless steel grades
- Limited service temperature — 400°C (752 °F), worse than 78% of stainless steel grades
SUS890L properties
Typical room-temperature values for SUS890L-Annealed; bars are the position among stainless steel grades.
Physical3
SUS890L has a density of 7.98 g/cm³ (0.288 lb/in³), heavier than 85% of stainless steel grades. It melts at 1,320°C (2,408 °F).
Mechanical16
SUS890L has a yield strength of 260 MPa (37.7 ksi) and a tensile strength of 590 MPa (85.6 ksi) — weaker than 84% of stainless steel grades. Elongation at break is 45% and the elastic modulus is 195 GPa (28.3 Msi).
Thermal6
SUS890L is rated for continuous service to 400°C (752 °F). It conducts heat at 12 W/m·K (6.93 BTU/hr·ft·°F), worse than 93% of stainless steel grades. Thermal expansion is 15.3 µm/m·K (8.5 µin/in·°F).
Electrical3
SUS890L conducts electricity at 1.7 % IACS, worse than 93% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is excellent (86/100), better than 94% of stainless steel grades.
Sustainability4
Producing a kilogram of SUS890L takes about 68 MJ of energy and emits 5.6 kg of CO₂ — more than 80% of stainless steel grades. Typical recycled content is 45%.
Manufacturability8
SUS890L's machinability is poor (30/100, worse than 70% of stainless steel grades); weldability very good (75/100); formability very good (72/100).
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. SUS890L is highlighted; hover a dot for its name, or open the interactive family chart.
Working with SUS890L
Is SUS890L easy to machine?
Tough and gummy with strong work hardening — use rigid setups, positive-rake carbide, heavy feeds, low-to-moderate speed and copious high-lubricity coolant; never dwell in the cut.
Can SUS890L be welded?
Readily welded by GTAW/GMAW/SMAW with over-alloyed Ni-base filler (ERNiCrMo-3 / Alloy 625) to avoid Mo segregation; low heat input, no preheat, interpass < 150 °C, pickle and passivate afterwards.
Can SUS890L be formed, bent or molded?
Very ductile but requires ~50 % higher forming loads than 304; allow generous springback, avoid excessive cold work before highly corrosive service or re-anneal at 1100–1150 °C with rapid quench.
SUS890L 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 |
|---|---|---|
| Clow carbon for weld corrosion resistance | ≤ 0.02 | 0.02 |
| Si | ≤ 1 | 0.4 |
| Mn | ≤ 2 | 1.5 |
| P | ≤ 0.05 | 0.03 |
| S | ≤ 0.04 | 0 |
| Ni | 23 – 28 | 25 |
| Cr | 19 – 23 | 21 |
| Mo | 4 – 5 | 4.5 |
| Cuimproves resistance in reducing acids | 1 – 2 | 1.5 |
| Fe | balance |
What surface finishes work on SUS890L?
Pickle (HNO₃/HF) or bead-blast then passivate per ASTM A967; electropolishing gives the smoothest, most corrosion-resistant surface for pharma and acid-handling equipment.
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 SUS890L in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- S31254
How much does SUS890L cost?
SUS890L is a high-cost stainless steel ($$$$), pricier than about 78% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
SUS890L — frequently asked
What is SUS890L used for?
SUS890L is typically used for acid processing equipment, marine components and flue-gas desulfurization. In short: 904L-equivalent acid grade; high Ni-Mo corrosion resistance; costly, hard to machine.
What is the yield strength of SUS890L?
SUS890L has a typical yield strength of 260 MPa (37.7 ksi) and a tensile strength of 590 MPa (85.6 ksi) — weaker than 84% of stainless steel grades. Strength varies by condition: see the 3 listed tempers.
Is SUS890L easy to machine?
Not especially — machinability is rated poor (30/100, worse than 70% of stainless steel grades). Tough and gummy with strong work hardening — use rigid setups, positive-rake carbide, heavy feeds, low-to-moderate speed and copious high-lubricity coolant; never dwell in the cut.
Can SUS890L be welded?
Yes — weldability is rated very good (75/100). Readily welded by GTAW/GMAW/SMAW with over-alloyed Ni-base filler (ERNiCrMo-3 / Alloy 625) to avoid Mo segregation; low heat input, no preheat, interpass < 150 °C, pickle and passivate afterwards.
What surface finishes work on SUS890L?
Pickle (HNO₃/HF) or bead-blast then passivate per ASTM A967; electropolishing gives the smoothest, most corrosion-resistant surface for pharma and acid-handling equipment.
Can SUS890L be formed, bent or molded?
Very ductile but requires ~50 % higher forming loads than 304; allow generous springback, avoid excessive cold work before highly corrosive service or re-anneal at 1100–1150 °C with rapid quench.
What is the maximum service temperature of SUS890L?
SUS890L is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
How much does SUS890L cost?
SUS890L is a high-cost stainless steel ($$$$), 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
- JIS G 4304 / G 4305 — Hot and cold rolled stainless steel plate, sheet and strip — JSA (2021)
- ASTM B625 / ASME SB-625 — UNS N08904 plate, sheet and strip — ASTM (2020)
- Outokumpu 904L (EN 1.4539) datasheet — Outokumpu (2023)
- Sandvik 2RK65 / Alleima 904L tube datasheet — Alleima (Sandvik Materials Technology) (2022)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
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.