Stainless Steel ER410-SR650
Heat-treated state
UNS S41080
SR650 = sR 650 °C
Lower-temperature temper used when higher strength must be retained with only partial softening (e.g. 12Cr rotor and valve repairs).
Values for the SR650 condition
Other ER410 tempers and conditions
ER410 is listed in 4 conditions; see the grade overview at ER410.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
PWHT 760 °C | Standard qualification/service condition: temper 730–760 °C, air cool — best combination of ductility, toughness and corrosion resistance. | 450 | 620 | 23 | 22 HRC | — |
SR650This page SR 650 °C | Lower-temperature temper used when higher strength must be retained with only partial softening (e.g. 12Cr rotor and valve repairs). | 540 | 700 | 18 | 30 HRC | 3 % IACS |
AWDefault As-welded deposit | Reference deposit condition straight off the arc with 150–300 °C preheat; hard and crack-sensitive — use only for wear overlays or where PWHT follows later. | 620 | 790 | 14 | 40 HRC | — |
Quenched and tempered | Full re-austenitize and temper of the weldment/overlay to homogenize the deposit and reach a specified hardness band on 410-type components. | 650 | 830 | 17 | 28 HRC | 3 % IACS |
What is ER410-SR650?
ER410-SR650 is ER410 heat treated to SR650 — lower-temperature temper used when higher strength must be retained with only partial softening (e.g. 12Cr rotor and valve repairs). ER410-SR650 has a yield strength of 540 MPa (78.3 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 82% of stainless steel grades. Elongation at break is 18% and the elastic modulus is 200 GPa (29 Msi). ER410-SR650 has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,480°C (2,696 °F). AW is the default condition FabDigit quotes; SR650 is available on request or by drawing note.
Advantages
- High electrical conductivity — 3 % IACS, better than 95% of stainless steel grades
- Conducts heat well — 25 W/m·K (14.4 BTU/hr·ft·°F), better than 93% of stainless steel grades
- Low embodied carbon — 3.6 kg CO₂/kg, better than 83% of stainless steel grades
- High strength — 540 MPa (78.3 ksi), better than 82% of stainless steel grades
Limitations
- Needs corrosion protection — 42/100, worse than 90% of stainless steel grades
- Limited ductility — 18%, worse than 83% of stainless steel grades
- Difficult to weld — 45/100, worse than 79% of stainless steel grades
ER410-SR650 properties
Typical room-temperature values for ER410-SR650; 22 are specific to this condition. Other listed values are ER410 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
ER410-SR650 has a density of 7.7 g/cm³ (0.278 lb/in³), lighter than 83% of stainless steel grades. It melts at 1,480°C (2,696 °F).
Mechanical13
ER410-SR650 has a yield strength of 540 MPa (78.3 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 82% of stainless steel grades. Elongation at break is 18% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
ER410-SR650 is rated for continuous service to 600°C (1,112 °F). It conducts heat at 25 W/m·K (14.4 BTU/hr·ft·°F), better than 93% of stainless steel grades. Thermal expansion is 9.9 µm/m·K (5.5 µin/in·°F).
Electrical3
ER410-SR650 conducts electricity at 3 % IACS, better than 95% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is fair (42/100), worse than 90% of stainless steel grades.
Sustainability4
Producing a kilogram of ER410-SR650 takes about 50 MJ of energy and emits 3.6 kg of CO₂ — less than 80% of stainless steel grades. Typical recycled content is 60%.
Manufacturability6
ER410-SR650's machinability is fair (40/100, better than 72% of stainless steel grades); weldability fair (45/100); formability poor (28/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with ER410-SR650
Is ER410 easy to machine?
Machine only after tempering; as-welded deposit at ~40 HRC needs carbide or CBN tooling, rigid setups and low feeds.
Can ER410 be welded?
GTAW/GMAW/SAW with Ar or Ar-2%CO₂; preheat and hold interpass 150–300 °C, cool slowly to ~150 °C, then temper 730–760 °C for toughness and to avoid hydrogen/cold cracking.
Can ER410 be formed, bent or molded?
Deposit is essentially non-formable in the hardened state; any straightening or bending must be done after full temper and at moderate strain.
What surface finishes work on ER410?
Grinds and polishes to a fine finish; passivate in nitric acid after grinding to restore the chromium oxide film — do not plate over untempered martensite (hydrogen embrittlement risk).
ER410 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 |
|---|---|---|
| CAWS A5.9 ER410 | ≤ 0.12 | 0.08 |
| Cr | 11.5 – 13.5 | 12.5 |
| Ni | ≤ 0.6 | 0.3 |
| Mo | ≤ 0.75 | 0.2 |
| Mn | ≤ 0.6 | 0.4 |
| Si | ≤ 0.5 | 0.35 |
| Cu | ≤ 0.75 | 0.1 |
| P | ≤ 0.03 | 0.02 |
| S | ≤ 0.03 | 0.01 |
| Fe | balance | — |
ER410-SR650 — frequently asked
What is ER410-SR650 used for?
ER410-SR650 is typically used for 410 stainless valve and pump component repair, steam turbine blade welding, 12% Cr pump casing and impeller weld repair, petrochemical valve trim rebuilding, corrosion-resistant overlay on carbon steel shafts and sleeve and bushing wear surface build-up. In short: matches 410 martensitic base; hard 40 HRC deposit; requires preheat and temper.
What is the yield strength of ER410-SR650?
ER410-SR650 has a typical yield strength of 540 MPa (78.3 ksi) and a tensile strength of 700 MPa (102 ksi) — stronger than 82% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is ER410-SR650 easy to machine?
Not especially — machinability is rated fair (40/100, better than 72% of stainless steel grades). Machine only after tempering; as-welded deposit at ~40 HRC needs carbide or CBN tooling, rigid setups and low feeds.
Can ER410-SR650 be welded?
With care — weldability is rated fair (45/100). GTAW/GMAW/SAW with Ar or Ar-2%CO₂; preheat and hold interpass 150–300 °C, cool slowly to ~150 °C, then temper 730–760 °C for toughness and to avoid hydrogen/cold cracking.
What surface finishes work on ER410-SR650?
Grinds and polishes to a fine finish; passivate in nitric acid after grinding to restore the chromium oxide film — do not plate over untempered martensite (hydrogen embrittlement risk).
Can ER410-SR650 be formed, bent or molded?
Deposit is essentially non-formable in the hardened state; any straightening or bending must be done after full temper and at moderate strain.
What is the maximum service temperature of ER410-SR650?
ER410-SR650 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 ER410-AW and ER410 PWHT760?
AW is the default condition — reference deposit condition straight off the arc with 150–300 °C preheat; hard and crack-sensitive — use only for wear overlays or where PWHT follows later. PWHT760: standard qualification/service condition: temper 730–760 °C, air cool — best combination of ductility, toughness and corrosion resistance. Yield strength is 620 MPa in AW versus 450 MPa in PWHT760.
Sources
- AWS A5.9/A5.9M — Bare Stainless Steel Welding Electrodes and Rods — AWS (2017)
- ASM Specialty Handbook: Stainless Steels — ASM International (1994)
- ASM Handbook Vol.6 — Welding, Brazing and Soldering — ASM International (1993)
- Stainless filler metal ER410 datasheets (Böhler Welding, Lincoln Electric, ESAB) — various (2023)
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.