Steel ER80S-B3L PWHT-705x8
Heat-treated state
UNS K30560
Use the 705 °C, 8–10 h treatment to envelope heavy-wall hydroprocessing welds given repeated or long PWHT: tensile falls to 570 MPa but toughness and temper-embrittlement resistance are best.
Values for the PWHT-705x8 condition
Other ER80S-B3L tempers and conditions
ER80S-B3L is listed in 3 conditions; see the grade overview at ER80S-B3L.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
PWHT-705x8This page PWHT | Use the 705 °C, 8–10 h treatment to envelope heavy-wall hydroprocessing welds given repeated or long PWHT: tensile falls to 570 MPa but toughness and temper-embrittlement resistance are best. | 470 | 570 | 25 | 162 HB | — |
PWHT-690Default PWHT | Pick stress relief at 690 °C ± 15 °C for 1 h, the classification test condition and the usual PWHT for P22 pressure equipment, for the best balance of 620 MPa tensile and 22% elongation. | 520 | 620 | 22 | 180 HB | — |
As-welded deposit | Use as-deposited weld metal only for thin walls, temporary parts or joints that will be heat treated later; the bainitic structure gives 760 MPa tensile with high hardness and low toughness. | 640 | 760 | 17 | 23 HRC | — |
What is ER80S-B3L PWHT-705x8?
ER80S-B3L PWHT-705x8 is ER80S-B3L heat treated to PWHT-705x8 — use the 705 °C, 8–10 h treatment to envelope heavy-wall hydroprocessing welds given repeated or long PWHT: tensile falls to 570 MPa but toughness and temper-embrittlement resistance are best. ER80S-B3L PWHT-705x8 has a yield strength of 470 MPa (68.2 ksi) and a tensile strength of 570 MPa (82.7 ksi) — stronger than 57% of steel grades. Elongation at break is 25% and the elastic modulus is 205 GPa (29.7 Msi). ER80S-B3L PWHT-705x8 has a density of 7.83 g/cm³ (0.283 lb/in³), lighter than 80% of steel grades. It melts at 1,490°C (2,714 °F). PWHT-690 is the default condition FabDigit quotes; PWHT-705x8 is available on request or by drawing note.
Advantages
- High service temperature — 550°C (1,022 °F), better than 95% of steel grades
- Tough — resists crack growth — 130 MPa·√m (118.3 ksi·√in), better than 89% of steel grades
- Readily welded — 80/100, better than 79% of steel grades
- Ductile — tolerates forming and impact — 25%, better than 77% of steel grades
Limitations
- High embodied carbon — 2.6 kg CO₂/kg, worse than 87% of steel grades
ER80S-B3L PWHT-705x8 properties
Typical room-temperature values for ER80S-B3L PWHT-705x8; 11 are specific to this condition. Other listed values are ER80S-B3L reference data and may not represent this condition. Bars are the position among steel grades.
Physical3
ER80S-B3L PWHT-705x8 has a density of 7.83 g/cm³ (0.283 lb/in³), lighter than 80% of steel grades. It melts at 1,490°C (2,714 °F).
Mechanical16
ER80S-B3L PWHT-705x8 has a yield strength of 470 MPa (68.2 ksi) and a tensile strength of 570 MPa (82.7 ksi) — stronger than 57% of steel grades. Elongation at break is 25% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
ER80S-B3L PWHT-705x8 is rated for continuous service to 550°C (1,022 °F). It conducts heat at 38 W/m·K (22 BTU/hr·ft·°F), worse than 69% of steel grades. Thermal expansion is 12.5 µm/m·K (6.94 µin/in·°F).
Electrical3
ER80S-B3L PWHT-705x8 conducts electricity at 7.8 % IACS, worse than 57% of steel grades.
Chemical & Environmental3
Corrosion resistance is poor (20/100), better than 87% of steel grades.
Sustainability4
Producing a kilogram of ER80S-B3L PWHT-705x8 takes about 32 MJ of energy and emits 2.6 kg of CO₂ — more than 70% of steel grades. Typical recycled content is 30%.
Manufacturability7
ER80S-B3L PWHT-705x8's machinability is fair (50/100, worse than 53% of steel grades); weldability very good (80/100); formability good (55/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with ER80S-B3L PWHT-705x8
Is ER80S-B3L easy to machine?
After 690 °C post-weld heat treatment the deposit machines close to annealed 4130 (machinability rating about 45); as-welded bainite is harder, so heat treat before finish machining.
Can ER80S-B3L be welded?
GTAW, GMAW and SAW all apply; typical preheat 150–230 °C, interpass ≤300 °C, and 690 °C post-weld stress relief. The low-carbon composition reduces as-welded hardness and cold-cracking tendency.
Can ER80S-B3L be formed, bent or molded?
Supplied as drawn spooled wire or straight cut lengths, with no forming operation at the user end; feedability depends on the copper coating and wire diameter tolerance.
What surface finishes work on ER80S-B3L?
The steel deposit has no corrosion resistance — blast and paint, aluminize, or apply a high-temperature coating to the equipment specification; anodizing does not apply.
ER80S-B3L 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 version, vs 0.07-0.12% for ER80S-B3 | ≤ 0.05 | 0.04 |
| Mn | 0.4 – 0.7 | 0.55 |
| Si | 0.4 – 0.7 | 0.55 |
| Cr | 2.3 – 2.7 | 2.45 |
| Mo | 0.9 – 1.2 | 1.05 |
| Ni | ≤ 0.2 | 0.05 |
| Cuincludes copper coating | ≤ 0.35 | 0.1 |
| P | ≤ 0.03 | 0.01 |
| S | ≤ 0.03 | 0.01 |
| Fe | balance | — |
ER80S-B3L PWHT-705x8 — frequently asked
What is ER80S-B3L PWHT-705x8 used for?
ER80S-B3L PWHT-705x8 is typically used for P22 pipe welding, reheater/superheater tube welding, hydrogen service vessels and power plant piping. In short: low-carbon 2.25Cr-1Mo filler; lower cold-cracking tendency; hydrogen service weld metal.
What is the yield strength of ER80S-B3L PWHT-705x8?
ER80S-B3L PWHT-705x8 has a typical yield strength of 470 MPa (68.2 ksi) and a tensile strength of 570 MPa (82.7 ksi) — stronger than 57% of steel grades. Strength varies by condition: see the 3 listed tempers.
Is ER80S-B3L PWHT-705x8 easy to machine?
Reasonably — machinability is rated fair (50/100, worse than 53% of steel grades). After 690 °C post-weld heat treatment the deposit machines close to annealed 4130 (machinability rating about 45); as-welded bainite is harder, so heat treat before finish machining.
Can ER80S-B3L PWHT-705x8 be welded?
Yes — weldability is rated very good (80/100). GTAW, GMAW and SAW all apply; typical preheat 150–230 °C, interpass ≤300 °C, and 690 °C post-weld stress relief. The low-carbon composition reduces as-welded hardness and cold-cracking tendency.
What surface finishes work on ER80S-B3L PWHT-705x8?
The steel deposit has no corrosion resistance — blast and paint, aluminize, or apply a high-temperature coating to the equipment specification; anodizing does not apply.
Can ER80S-B3L PWHT-705x8 be formed, bent or molded?
Supplied as drawn spooled wire or straight cut lengths, with no forming operation at the user end; feedability depends on the copper coating and wire diameter tolerance.
What is the maximum service temperature of ER80S-B3L PWHT-705x8?
ER80S-B3L PWHT-705x8 is rated for continuous use to about 550°C (1,022 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between ER80S-B3L PWHT-690 and ER80S-B3L-AW?
PWHT-690 is the default condition — pick stress relief at 690 °C ± 15 °C for 1 h, the classification test condition and the usual PWHT for P22 pressure equipment, for the best balance of 620 MPa tensile and 22% elongation. AW: use as-deposited weld metal only for thin walls, temporary parts or joints that will be heat treated later; the bainitic structure gives 760 MPa tensile with high hardness and low toughness. Yield strength is 520 MPa in PWHT-690 versus 640 MPa in AW.
Sources
- AWS A5.28/A5.28M — Low-Alloy Steel Electrodes and Rods for Gas Shielded Arc Welding — American Welding Society (2020)
- ASME BPVC Section II Part C / Part D (SFA-5.28; 2.25Cr-1Mo physical & allowable data) — ASME (2023)
- ASM Handbook Vol.1 & Vol.6 — Cr-Mo steels and weld metals — ASM International (2005)
- ER80S-B3L/ER55S-B3L — Böhler / Lincoln / (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.