Nickel Alloy ENiCrMo-1-SR (Stress relieved)
Heat-treated state
UNS W80001
Pick when the fabrication code or base metal requires PWHT; slightly lowers strength and can reduce corrosion performance if slow-cooled through the sensitization range.
Values for the SR condition
Other ENiCrMo-1 tempers and conditions
ENiCrMo-1 is listed in 3 conditions; see the grade overview at ENiCrMo-1.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution annealed | Used for weld overlay or clad components that are solution annealed with the base metal to restore maximum intergranular-corrosion resistance and ductility. | 300 | 620 | 48 | 150 HB | 1.5 % IACS |
SRThis page Stress relieved | Pick when the fabrication code or base metal requires PWHT; slightly lowers strength and can reduce corrosion performance if slow-cooled through the sensitization range. | 400 | 660 | 38 | 180 HB | 1.5 % IACS |
AWDefault As-welded deposit | Standard supplied/tested condition: use for corrosion-service joints and overlays where no post-weld heat treatment is applied. | 450 | 690 | 35 | 195 HB | 1.5 % IACS |
What is ENiCrMo-1-SR?
ENiCrMo-1-SR is ENiCrMo-1 heat treated to SR — pick when the fabrication code or base metal requires PWHT; slightly lowers strength and can reduce corrosion performance if slow-cooled through the sensitization range. ENiCrMo-1-SR has a yield strength of 400 MPa (58 ksi) and a tensile strength of 660 MPa (95.7 ksi) — stronger than 56% of nickel alloy grades. Elongation at break is 38% and the elastic modulus is 196 GPa (28.4 Msi). ENiCrMo-1-SR has a density of 8.3 g/cm³ (0.3 lb/in³), lighter than 52% of nickel alloy grades. It melts at 1,260°C (2,300 °F). AW is the default condition FabDigit quotes; SR is available on request or by drawing note.
Limitations
- Hard to polish — 55/100, worse than 95% of nickel alloy grades
- Limited service temperature — 540°C (1,004 °F), worse than 75% of nickel alloy grades
ENiCrMo-1-SR properties
Typical room-temperature values for ENiCrMo-1-SR; 20 are specific to this condition. Other listed values are ENiCrMo-1 reference data and may not represent this condition. Bars are the position among nickel alloy grades.
Physical3
ENiCrMo-1-SR has a density of 8.3 g/cm³ (0.3 lb/in³), lighter than 52% of nickel alloy grades. It melts at 1,260°C (2,300 °F).
Mechanical14
ENiCrMo-1-SR has a yield strength of 400 MPa (58 ksi) and a tensile strength of 660 MPa (95.7 ksi) — stronger than 56% of nickel alloy grades. Elongation at break is 38% and the elastic modulus is 196 GPa (28.4 Msi).
Thermal5
ENiCrMo-1-SR is rated for continuous service to 540°C (1,004 °F). It conducts heat at 11 W/m·K (6.36 BTU/hr·ft·°F), worse than 60% of nickel alloy grades. Thermal expansion is 14 µm/m·K (7.78 µin/in·°F).
Electrical3
ENiCrMo-1-SR conducts electricity at 1.5 % IACS, better than 59% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (78/100), better than 51% of nickel alloy grades.
Sustainability4
Producing a kilogram of ENiCrMo-1-SR takes about 180 MJ of energy and emits 13.5 kg of CO₂ — more than 69% of nickel alloy grades. Typical recycled content is 30%.
Manufacturability7
ENiCrMo-1-SR's machinability is poor (24/100, better than 71% of nickel alloy grades); weldability very good (70/100); formability fair (35/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with ENiCrMo-1-SR
Is ENiCrMo-1 easy to machine?
Deposits are gummy and work-hardening — use rigid setups, sharp positive-rake carbide, low speed/heavy positive feed and flood coolant; grinding of weld caps is often faster than turning.
Can ENiCrMo-1 be welded?
DCEP, low heat input, stringer beads, interpass typically below 100–150 °C; redry electrodes per the maker (about 250–300 °C) and keep in a heated quiver to avoid porosity and hot cracking.
Can ENiCrMo-1 be formed, bent or molded?
Not a wrought product; weld deposits tolerate light peening but heavy cold forming of the joint is not recommended.
What surface finishes work on ENiCrMo-1?
Remove all slag and heat tint by grinding then pickle/passivate or electropolish to restore the Cr-Mo passive film; do not anodize.
ENiCrMo-1 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 to limit carbide sensitization | ≤ 0.05 | 0.03 |
| Mn | 1 – 2 | 1.5 |
| Si | ≤ 1 | 0.5 |
| P | ≤ 0.04 | — |
| S | ≤ 0.03 | — |
| Cr | 21 – 23.5 | 22 |
| Mo | 5.5 – 7.5 | 6.5 |
| Fe | 18 – 21 | 19.5 |
| Cuaids resistance in reducing acids | 1.5 – 2.5 | 2 |
| Nb+Tastabilizing addition | 1.75 – 2.5 | 2.1 |
| Co | ≤ 2.5 | — |
| W | ≤ 1 | — |
| Others, total | ≤ 0.5 | — |
| Niremainder, approx. 42–46 % | balance | — |
ENiCrMo-1-SR — frequently asked
What is ENiCrMo-1-SR used for?
ENiCrMo-1-SR is typically used for manual SMAW repair of Ni-Mo alloys, reducing acid process vessels and field maintenance welding. In short: SMAW version of ERNiCrMo-1; field-repair nickel electrode; reducing-service manual welding.
What is the yield strength of ENiCrMo-1-SR?
ENiCrMo-1-SR has a typical yield strength of 400 MPa (58 ksi) and a tensile strength of 660 MPa (95.7 ksi) — stronger than 56% of nickel alloy grades. Strength varies by condition: see the 3 listed tempers.
Is ENiCrMo-1-SR easy to machine?
Not especially — machinability is rated poor (24/100, better than 71% of nickel alloy grades). Deposits are gummy and work-hardening — use rigid setups, sharp positive-rake carbide, low speed/heavy positive feed and flood coolant; grinding of weld caps is often faster than turning.
Can ENiCrMo-1-SR be welded?
Yes — weldability is rated very good (70/100). DCEP, low heat input, stringer beads, interpass typically below 100–150 °C; redry electrodes per the maker (about 250–300 °C) and keep in a heated quiver to avoid porosity and hot cracking.
What surface finishes work on ENiCrMo-1-SR?
Remove all slag and heat tint by grinding then pickle/passivate or electropolish to restore the Cr-Mo passive film; do not anodize.
Can ENiCrMo-1-SR be formed, bent or molded?
Not a wrought product; weld deposits tolerate light peening but heavy cold forming of the joint is not recommended.
What is the maximum service temperature of ENiCrMo-1-SR?
ENiCrMo-1-SR is rated for continuous use to about 540°C (1,004 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between ENiCrMo-1-AW and ENiCrMo-1-SA?
AW is the default condition — standard supplied/tested condition: use for corrosion-service joints and overlays where no post-weld heat treatment is applied. SA: used for weld overlay or clad components that are solution annealed with the base metal to restore maximum intergranular-corrosion resistance and ductility. Yield strength is 450 MPa in AW versus 300 MPa in SA.
Sources
- AWS A5.11/A5.11M — Nickel and Nickel-Alloy Welding Electrodes for Shielded Metal Arc Welding — American Welding Society (2018)
- AWS A5.14/A5.14M — Nickel and Nickel-Alloy Bare Welding Electrodes and Rods (ERNiCrMo-1) — American Welding Society (2018)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- Hastelloy G / G-3 alloy technical data (Ni-Cr-Mo-Cu-Nb) — Haynes International (2020)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.