Stainless Steel E410-QT (Quenched and tempered)
Heat-treated state
EN E410 · UNS W41010
Use when the whole fabrication is re-heat-treated with the 410/CA-15 base metal to give a uniform, refined tempered-martensite structure.
Values for the QT condition
Other E410 tempers and conditions
E410 is listed in 8 conditions; see the grade overview at E410.
Compare all 8 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Heavy-coated, flat/horizontal high-deposition type | Use for flat-position build-up and cladding where deposition rate governs; not for out-of-position work. | 390 | 550 | 21 | 19 HRC | 3 % IACS |
Silica-bearing rutile coating, AC or DCEP | Choose for the smoothest bead appearance and best wash-in on fillet and vertical-down welds. | 395 | 555 | 22 | 19 HRC | 3 % IACS |
PWHTDefault Post-weld heat treated | Standard delivery/qualification condition: tempers the martensite for ductility and toughness while meeting AWS A5.4 450 MPa / 20 % requirements. | 400 | 560 | 23 | 20 HRC | — |
Rutile (titania) coating, AC or DCEP, all-position | The most widely stocked coating type: smooth arc, easy slag removal, AC-capable (Chinese old designation G202). | 405 | 565 | 22 | 20 HRC | 3 % IACS |
Lime/basic coating, DCEP only, all-position | Pick for heavier sections and restrained joints where the lowest hydrogen and best deposit toughness are needed (Chinese old designation G207). | 430 | 590 | 24 | 21 HRC | 3 % IACS |
QTThis page Quenched and tempered | Use when the whole fabrication is re-heat-treated with the 410/CA-15 base metal to give a uniform, refined tempered-martensite structure. | 470 | 640 | 21 | 22 HRC | 3 % IACS |
As-welded deposit | Pick when the overlay is used for hardness/wear and no post-weld heat treatment is possible; expect low ductility and cracking risk in restrained joints. | 600 | 780 | 10 | 41 HRC | — |
Hardfacing overlay, as-deposited and stress-relieved only | Choose for valve seats, seal faces and steam-erosion build-up where maximum as-deposited hardness matters more than weld-metal ductility. | 640 | 800 | 8 | 43 HRC | 2.8 % IACS |
What is E410-QT?
E410-QT is E410 heat treated to QT — use when the whole fabrication is re-heat-treated with the 410/CA-15 base metal to give a uniform, refined tempered-martensite structure. E410-QT has a yield strength of 470 MPa (68.2 ksi) and a tensile strength of 640 MPa (92.8 ksi) — stronger than 74% of stainless steel grades. Elongation at break is 21% and the elastic modulus is 200 GPa (29 Msi). E410-QT has a density of 7.75 g/cm³ (0.28 lb/in³), lighter than 65% of stainless steel grades. It melts at 1,480°C (2,696 °F). PWHT is the default condition FabDigit quotes; QT is available on request or by drawing note.
Advantages
- High electrical conductivity — 3 % IACS, better than 95% of stainless steel grades
- Conducts heat well — 24.9 W/m·K (14.4 BTU/hr·ft·°F), better than 87% of stainless steel grades
Limitations
- Low fracture toughness — 70 MPa·√m (63.7 ksi·√in), worse than 83% of stainless steel grades
- Difficult to weld — 40/100, worse than 83% of stainless steel grades
- Needs corrosion protection — 48/100, worse than 80% of stainless steel grades
- Limited ductility — 21%, worse than 78% of stainless steel grades
E410-QT properties
Typical room-temperature values for E410-QT; 23 are specific to this condition. Other listed values are E410 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
E410-QT has a density of 7.75 g/cm³ (0.28 lb/in³), lighter than 65% of stainless steel grades. It melts at 1,480°C (2,696 °F).
Mechanical17
E410-QT has a yield strength of 470 MPa (68.2 ksi) and a tensile strength of 640 MPa (92.8 ksi) — stronger than 74% of stainless steel grades. Elongation at break is 21% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
E410-QT is rated for continuous service to 650°C (1,202 °F). It conducts heat at 24.9 W/m·K (14.4 BTU/hr·ft·°F), better than 87% of stainless steel grades. Thermal expansion is 9.9 µm/m·K (5.5 µin/in·°F).
Electrical3
E410-QT conducts electricity at 3 % IACS, better than 95% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is fair (48/100), worse than 80% of stainless steel grades.
Sustainability4
Producing a kilogram of E410-QT takes about 53 MJ of energy and emits 4.2 kg of CO₂ — less than 67% of stainless steel grades. Typical recycled content is 55%.
Manufacturability6
E410-QT's machinability is fair (42/100, better than 79% of stainless steel grades); weldability fair (40/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with E410-QT
Is E410 easy to machine?
Machine only after the 730–760 °C temper; as-welded deposit at ~40 HRC needs carbide or CBN tooling, rigid setups and low surface speed.
Can E410 be welded?
Preheat 200–300 °C, hold interpass 200–350 °C, avoid interruption, and temper at 730–760 °C soon after cooling to ~150 °C to prevent hydrogen/delayed cracking; redry electrodes 300–350 °C for basic types.
Can E410 be formed, bent or molded?
Not a wrought product — deposit is not cold formed; control bead sequence and stringer technique to limit residual stress in thick overlays.
What surface finishes work on E410?
Grind/blast then passivate or electropolish for a corrosion-resistant surface; chrome or nickel plating and paint adhere well after grit blasting.
E410 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 A5.4 undiluted deposit | ≤ 0.12 | 0.08 |
| Cr | 11 – 13.5 | 12.5 |
| Ni | ≤ 0.7 | 0.4 |
| Mn | ≤ 1 | 0.6 |
| Si | ≤ 0.9 | 0.5 |
| Mo | ≤ 0.75 | 0.1 |
| Cu | ≤ 0.75 | 0.1 |
| P | ≤ 0.04 | 0.02 |
| S | ≤ 0.03 | 0.02 |
| Fe | balance | — |
E410-QT — frequently asked
What is E410-QT used for?
E410-QT is typically used for valve seat hardfacing, turbine blade buildup, pump shaft cladding and repair of 410/420 castings. In short: air-hardening martensitic filler; hardfacing and shaft buildup; mandatory preheat and temper.
What is the yield strength of E410-QT?
E410-QT has a typical yield strength of 470 MPa (68.2 ksi) and a tensile strength of 640 MPa (92.8 ksi) — stronger than 74% of stainless steel grades. Strength varies by condition: see the 8 listed tempers.
Is E410-QT easy to machine?
Not especially — machinability is rated fair (42/100, better than 79% of stainless steel grades). Machine only after the 730–760 °C temper; as-welded deposit at ~40 HRC needs carbide or CBN tooling, rigid setups and low surface speed.
Can E410-QT be welded?
With care — weldability is rated fair (40/100). Preheat 200–300 °C, hold interpass 200–350 °C, avoid interruption, and temper at 730–760 °C soon after cooling to ~150 °C to prevent hydrogen/delayed cracking; redry electrodes 300–350 °C for basic types.
What surface finishes work on E410-QT?
Grind/blast then passivate or electropolish for a corrosion-resistant surface; chrome or nickel plating and paint adhere well after grit blasting.
Can E410-QT be formed, bent or molded?
Not a wrought product — deposit is not cold formed; control bead sequence and stringer technique to limit residual stress in thick overlays.
What is the maximum service temperature of E410-QT?
E410-QT is rated for continuous use to about 650°C (1,202 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between E410 PWHT and E410-HF?
PWHT is the default condition — standard delivery/qualification condition: tempers the martensite for ductility and toughness while meeting AWS A5.4 450 MPa / 20 % requirements. HF: choose for valve seats, seal faces and steam-erosion build-up where maximum as-deposited hardness matters more than weld-metal ductility. Yield strength is 400 MPa in PWHT versus 640 MPa in HF.
Sources
- AWS A5.4/A5.4M — Specification for Stainless Steel Electrodes for Shielded Metal Arc Welding — AWS (2012)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- ASM Handbook Vol.6 — Welding, Brazing and Soldering (martensitic stainless welding) — ASM International (1993)
- 410 covered electrode datasheets (Lincoln Electric, ESAB, /atlantic) — 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.