Stainless Steel 1.4986
EN 1.4986
1.4986 (X7CrNiMoBNb16-16) is a niobium- and boron-stabilised high Cr-Ni-Mo austenitic stainless closely related to 1.4981, alloyed for creep strength rather than room-temperature strength.
Reference datasheet — 1.4986 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 SA condition
1.4986 tempers and conditions
1.4986 is supplied in 4 conditions, soft to hard. SA is the default FabDigit quotes; the values on this page are for it.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Hot finished | Hot-finished plate, bar and seamless tube supplied descaled and solution treated; properties essentially those of the SA condition. | 265 | 610 | 38 | 180 HB | 2 % IACS |
SADefault Solution annealed | Standard supply condition for tube, bar and plate; best ductility, weldability and long-term creep behaviour. | 275 | 620 | 40 | 175 HB | — |
Solution annealed then cold drawn / lightly cold worked | Cold-drawn tube and bar with tighter tolerances and better surface, moderately raised proof strength. | 420 | 700 | 30 | 17 HRC | 2 % IACS |
Solution annealed + 10–20 % cold work | Deliberate cold deformation of ~15 % used on superheater tubing to boost 600–700 °C creep-rupture strength via fine carbide/boride precipitation. | 550 | 780 | 22 | 23 HRC | 2 % IACS |
What is 1.4986?
1.4986 (X7CrNiMoBNb16-16) is a niobium- and boron-stabilised high Cr-Ni-Mo austenitic stainless closely related to 1.4981, alloyed for creep strength rather than room-temperature strength. Solution-annealed material gives 275 MPa yield, 620 MPa tensile, 40 % elongation and 175 HB (87 HRB) with service to 700 °C, and is supplied as tube, bar and plate in SA, SA+CD, SA+CW15 and hot-finished conditions. Corrosion resistance is at roughly 316 level rather than better, and the boron addition raises hot-cracking sensitivity during welding. Where creep strength is not the driver, 1.4981 is the simpler choice. 1.4986 has a density of 8 g/cm³ (0.289 lb/in³), heavier than 92% of stainless steel grades. It melts at 1,370°C (2,498 °F). 1.4986 has a yield strength of 275 MPa (39.9 ksi) and a tensile strength of 620 MPa (89.9 ksi) — weaker than 77% of stainless steel grades. Elongation at break is 40% and the elastic modulus is 197 GPa (28.6 Msi).
What is 1.4986 used for?
- boiler headers
- high-temperature reactor components
- power plant piping
Advantages
- Forms and bends easily — 70/100, better than 79% of stainless steel grades
Limitations
- Low strength — 275 MPa (39.9 ksi), worse than 77% of stainless steel grades
- Low electrical conductivity — 2 % IACS, worse than 77% of stainless steel grades
1.4986 properties
Typical room-temperature values for 1.4986-SA; bars are the position among stainless steel grades.
Physical3
1.4986 has a density of 8 g/cm³ (0.289 lb/in³), heavier than 92% of stainless steel grades. It melts at 1,370°C (2,498 °F).
Mechanical14
1.4986 has a yield strength of 275 MPa (39.9 ksi) and a tensile strength of 620 MPa (89.9 ksi) — weaker than 77% of stainless steel grades. Elongation at break is 40% and the elastic modulus is 197 GPa (28.6 Msi).
Thermal6
1.4986 is rated for continuous service to 700°C (1,292 °F). It conducts heat at 15 W/m·K (8.67 BTU/hr·ft·°F), worse than 59% of stainless steel grades. Thermal expansion is 16.5 µm/m·K (9.17 µin/in·°F).
Electrical3
1.4986 conducts electricity at 2 % IACS, worse than 77% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (62/100), worse than 52% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4986 takes about 62 MJ of energy and emits 5.2 kg of CO₂ — more than 75% of stainless steel grades. Typical recycled content is 50%.
Manufacturability8
1.4986's machinability is poor (33/100, worse than 57% 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. 1.4986 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with 1.4986
Is 1.4986 easy to machine?
Machines like a tough 316: low speed, heavy positive-rake carbide tooling, rigid setup and flood coolant to fight work hardening and built-up edge.
Can 1.4986 be welded?
TIG/MIG/SAW with Nb-stabilized 16-16-2 or matching filler; boron increases hot-cracking sensitivity, so keep heat input low, avoid restraint and use interpass ≤150 °C.
Can 1.4986 be formed, bent or molded?
Excellent hot workability at 1150–1200 °C; cold forming is possible but with high work-hardening rate — solution anneal at 1050–1120 °C with rapid cooling after heavy forming.
1.4986 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 | 0.04 – 0.08 | 0.06 |
| Si | ≤ 0.7 | 0.45 |
| Mn | ≤ 1.5 | 1.2 |
| Pimpurity limit | ≤ 0.04 | |
| Simpurity limit | ≤ 0.02 | |
| Cr | 15.5 – 17.5 | 16.5 |
| Ni | 15.5 – 17.5 | 16.3 |
| Mo | 1.6 – 2 | 1.8 |
| Nbstabilizing addition, typically ≥10×C | 0.6 – 1.2 | 0.85 |
| Bmicro-boron for creep strength; key difference vs 1.4981 | 0 – 0.01 | 0.01 |
| N | ≤ 0.05 | |
| Fe | balance |
What surface finishes work on 1.4986?
Pickle/passivate after hot work or welding to restore the passive film; electropolishing or mechanical polishing gives good surfaces — no anodizing.
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 1.4986 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- EN / DIN / Werkstoff-Nr.
- X7CrNiMoBNb16-16
- Similar grades
- 1.4981
How much does 1.4986 cost?
1.4986 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.
1.4986 — frequently asked
What is 1.4986 used for?
1.4986 is typically used for boiler headers, high-temperature reactor components and power plant piping. In short: creep-strength 16-16 austenitic; nb and B stabilised; 700 °C service rating.
What is the yield strength of 1.4986?
1.4986 has a typical yield strength of 275 MPa (39.9 ksi) and a tensile strength of 620 MPa (89.9 ksi) — weaker than 77% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is 1.4986 easy to machine?
Not especially — machinability is rated poor (33/100, worse than 57% of stainless steel grades). Machines like a tough 316: low speed, heavy positive-rake carbide tooling, rigid setup and flood coolant to fight work hardening and built-up edge.
Can 1.4986 be welded?
Yes — weldability is rated good (60/100). TIG/MIG/SAW with Nb-stabilized 16-16-2 or matching filler; boron increases hot-cracking sensitivity, so keep heat input low, avoid restraint and use interpass ≤150 °C.
What surface finishes work on 1.4986?
Pickle/passivate after hot work or welding to restore the passive film; electropolishing or mechanical polishing gives good surfaces — no anodizing.
Can 1.4986 be formed, bent or molded?
Excellent hot workability at 1150–1200 °C; cold forming is possible but with high work-hardening rate — solution anneal at 1050–1120 °C with rapid cooling after heavy forming.
What is the maximum service temperature of 1.4986?
1.4986 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 1.4986-SA and 1.4986-HF?
SA is the default condition — standard supply condition for tube, bar and plate; best ductility, weldability and long-term creep behaviour. HF: hot-finished plate, bar and seamless tube supplied descaled and solution treated; properties essentially those of the SA condition. Yield strength is 275 MPa in SA versus 265 MPa in HF.
How much does 1.4986 cost?
1.4986 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
- EN 10302 — Creep resisting steels, nickel and cobalt alloys — CEN (2008)
- DIN 17459 — Seamless circular tubes of austenitic creep-resisting steels — DIN (1992)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.13B — Corrosion: Materials — ASM International (2005)
- Creep-resisting austenitic tube grades 1.4981 / 1.4986 datasheets — European tube producers (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.