Stainless Steel ER16-8-2
UNS S16880, S16800
ER16-8-2 is an austenitic stainless filler wire (UNS S16880/S16800) with a 16Cr-8Ni-2Mo balance formulated for high creep-rupture strength in welded steam and power piping.
Reference datasheet — ER16-8-2 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 AW condition
ER16-8-2 tempers and conditions
ER16-8-2 is supplied in 2 conditions, soft to hard. AW is the default FabDigit quotes; the values on this page are for it.
Compare all 2 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Post-weld heat treated | Pick when the joint is stabilized/solution treated with the base pipe; slightly lower strength, higher ductility. | 340 | 550 | 42 | 163 HB | 2.3 % IACS |
AWDefault As-welded deposit | Standard qualification condition for GTAW/GMAW deposits in steam-piping joints; use when no PWHT is applied. | 400 | 585 | 38 | 180 HB | 2.3 % IACS |
Supply forms, finishes and certifications
Ways ER16-8-2 is supplied — form, process route, surface or paperwork — without a datasheet of their own. The property values above apply.
| Option | What it is | Type |
|---|---|---|
WIRE-CD | Cold Drawn Wire | Supply form |
What is ER16-8-2?
ER16-8-2 is an austenitic stainless filler wire (UNS S16880/S16800) with a 16Cr-8Ni-2Mo balance formulated for high creep-rupture strength in welded steam and power piping. It is chosen for 316H, 321H and 347H piping where the joint must carry pressure at temperature; the deposit runs about 400 MPa yield, 585 MPa tensile, 38% elongation and 88 HRB, with service to about 760 °C. The near-zero-ferrite deposit is hot-crack sensitive, so heat input, interpass temperature and S/P levels must be controlled. Use 316L filler where creep strength does not govern. ER16-8-2 has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,400°C (2,552 °F). ER16-8-2 has a yield strength of 400 MPa (58 ksi) and a tensile strength of 585 MPa (84.8 ksi) — stronger than 57% of stainless steel grades. Elongation at break is 38% and the elastic modulus is 196 GPa (28.4 Msi).
What is ER16-8-2 used for?
- High-temperature steam piping welds
- Power generation austenitic pipe joints
- 316H, 321H and 347H header and superheater welds
- Boiler and steam turbine piping repair
- High-temperature valve and flange joints
- Root and fill passes in thick austenitic piping
ER16-8-2 properties
Typical room-temperature values for ER16-8-2-AW; bars are the position among stainless steel grades.
Physical3
ER16-8-2 has a density of 7.9 g/cm³ (0.285 lb/in³), heavier than 68% of stainless steel grades. It melts at 1,400°C (2,552 °F).
Mechanical16
ER16-8-2 has a yield strength of 400 MPa (58 ksi) and a tensile strength of 585 MPa (84.8 ksi) — stronger than 57% of stainless steel grades. Elongation at break is 38% and the elastic modulus is 196 GPa (28.4 Msi).
Thermal6
ER16-8-2 is rated for continuous service to 760°C (1,400 °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
ER16-8-2 conducts electricity at 2.3 % IACS, better than 55% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (58/100), worse than 62% of stainless steel grades.
Sustainability4
Producing a kilogram of ER16-8-2 takes about 55 MJ of energy and emits 4.5 kg of CO₂ — more than 50% of stainless steel grades. Typical recycled content is 55%.
Manufacturability7
ER16-8-2's machinability is fair (40/100, better than 72% of stainless steel grades); weldability very good (78/100); 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. ER16-8-2 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with ER16-8-2
Is ER16-8-2 easy to machine?
Weld metal machines like 316L — low speed, positive rake, rigid setup and flood coolant to avoid work hardening and built-up edge.
Can ER16-8-2 be welded?
Designed as the filler itself: GTAW/GMAW/SAW on 316H, 321H, 347H austenitic steam piping; keep interpass temperature low, limit heat input and use clean, low-S/P practice because the near-zero-ferrite deposit is hot-crack sensitive.
Can ER16-8-2 be formed, bent or molded?
Supplied as cold-drawn wire; deposits cold-form like austenitic stainless with high work hardening and springback.
ER16-8-2 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 | ≤ 0.1 | 0.06 |
| Cr | 14.5 – 16.5 | 15.5 |
| Ni | 7.5 – 9.5 | 8.5 |
| Mo | 1 – 2 | 1.5 |
| Mn | 1 – 2 | 1.6 |
| Si | 0.3 – 0.65 | 0.45 |
| P | ≤ 0.03 | 0.02 |
| S | ≤ 0.03 | 0.01 |
| Cu | ≤ 0.75 | 0.15 |
| Febalance, approx. 71–74 % | balance |
What surface finishes work on ER16-8-2?
Pickle and passivate or lightly grind/electropolish the bead; do not anodize — no plating usually needed for steam service.
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 ER16-8-2 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- S16880S16800
How much does ER16-8-2 cost?
ER16-8-2 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.
ER16-8-2 — frequently asked
What is ER16-8-2 used for?
ER16-8-2 is typically used for high-temperature steam piping welds, power generation austenitic pipe joints, 316H, 321H and 347H header and superheater welds, boiler and steam turbine piping repair, high-temperature valve and flange joints and root and fill passes in thick austenitic piping. In short: creep-strength austenitic filler; high-temperature steam piping wire; hot-crack sensitive deposit.
What is the yield strength of ER16-8-2?
ER16-8-2 has a typical yield strength of 400 MPa (58 ksi) and a tensile strength of 585 MPa (84.8 ksi) — stronger than 57% of stainless steel grades. Strength varies by condition: see the 2 listed tempers.
Is ER16-8-2 easy to machine?
Not especially — machinability is rated fair (40/100, better than 72% of stainless steel grades). Weld metal machines like 316L — low speed, positive rake, rigid setup and flood coolant to avoid work hardening and built-up edge.
Can ER16-8-2 be welded?
Yes — weldability is rated very good (78/100). Designed as the filler itself: GTAW/GMAW/SAW on 316H, 321H, 347H austenitic steam piping; keep interpass temperature low, limit heat input and use clean, low-S/P practice because the near-zero-ferrite deposit is hot-crack sensitive.
What surface finishes work on ER16-8-2?
Pickle and passivate or lightly grind/electropolish the bead; do not anodize — no plating usually needed for steam service.
Can ER16-8-2 be formed, bent or molded?
Supplied as cold-drawn wire; deposits cold-form like austenitic stainless with high work hardening and springback.
What is the maximum service temperature of ER16-8-2?
ER16-8-2 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.
What is the difference between ER16-8-2-AW and ER16-8-2 PWHT?
AW is the default condition — standard qualification condition for GTAW/GMAW deposits in steam-piping joints; use when no PWHT is applied. PWHT: pick when the joint is stabilized/solution treated with the base pipe; slightly lower strength, higher ductility. Yield strength is 400 MPa in AW versus 340 MPa in PWHT.
How much does ER16-8-2 cost?
ER16-8-2 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
- AWS A5.9/A5.9M — Bare Stainless Steel Welding Electrodes and Rods — AWS (2017)
- ASME BPVC Section II Part C / ASME B31.1 Power Piping — ASME (2023)
- ASM Handbook Vol. 6 — Welding, Brazing and Soldering — ASM International (1993)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- 16-8-2 stainless filler wire datasheets (Sandvik/Alleima 16.8.2, Böhler, Metrode) — various (2023)
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.