Steel E80C-B2
UNS W52030
E80C-B2 (UNS W52030) is a standard-carbon 1.25Cr-0.5Mo composite cored electrode for elevated-temperature Cr-Mo piping and vessels, depositing 505 MPa yield and 600 MPa tensile metal with 23 % elongation after PWHT.
Reference datasheet — E80C-B2 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 PWHT condition
E80C-B2 tempers and conditions
E80C-B2 is supplied in 3 conditions, soft to hard. PWHT is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
High-temperature temper 730–760 °C | Pick when heavy-wall vessel codes call for a higher or longer stress relief; softest, toughest condition but with reduced strength. | 460 | 560 | 26 | 9 HRC | 8 % IACS |
PWHTDefault Post-weld heat treated | The AWS A5.29 classification condition and the normal delivery state for Cr-Mo piping and vessel welds; use whenever code-required PWHT is applied. | 505 | 600 | 23 | 190 HB | — |
As-welded deposit | Only for non-code repairs or interim conditions — strength and hardness are much higher, toughness and hydrogen-crack resistance much lower. | 630 | 740 | 18 | 24 HRC | — |
What is E80C-B2?
E80C-B2 (UNS W52030) is a standard-carbon 1.25Cr-0.5Mo composite cored electrode for elevated-temperature Cr-Mo piping and vessels, depositing 505 MPa yield and 600 MPa tensile metal with 23 % elongation after PWHT. It is selected for code boiler and pressure-vessel work up to about 550 °C service and is supplied as spooled cored wire in AW, PWHT and PWHT-745 conditions. PWHT is normally mandatory because as-welded bainitic deposits exceed 250 HB, and corrosion resistance is low (score 16), so coating or insulation is required. E70C-B2L is the low-carbon alternative when as-welded hardness must be limited. E80C-B2 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,450°C (2,642 °F). E80C-B2 has a yield strength of 505 MPa (73.2 ksi) and a tensile strength of 600 MPa (87 ksi) — stronger than 64% of steel grades. Elongation at break is 23% and the elastic modulus is 205 GPa (29.7 Msi).
What is E80C-B2 used for?
- Boiler and pressure vessel welding
- Refinery high-temperature piping
- Steam power plant components
- Petrochemical reactor vessels
Advantages
- High service temperature — 550°C (1,022 °F), better than 95% of steel grades
- Readily welded — 75/100, better than 76% of steel grades
Limitations
- High embodied carbon — 2.6 kg CO₂/kg, worse than 87% of steel grades
E80C-B2 properties
Typical room-temperature values for E80C-B2-PWHT; bars are the position among steel grades.
Physical3
E80C-B2 has a density of 7.85 g/cm³ (0.284 lb/in³), heavier than 56% of steel grades. It melts at 1,450°C (2,642 °F).
Mechanical15
E80C-B2 has a yield strength of 505 MPa (73.2 ksi) and a tensile strength of 600 MPa (87 ksi) — stronger than 64% of steel grades. Elongation at break is 23% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
E80C-B2 is rated for continuous service to 550°C (1,022 °F). It conducts heat at 40 W/m·K (23.1 BTU/hr·ft·°F), worse than 64% of steel grades. Thermal expansion is 12.3 µm/m·K (6.83 µin/in·°F).
Electrical3
E80C-B2 conducts electricity at 7.8 % IACS, worse than 57% of steel grades.
Chemical & Environmental2
Corrosion resistance is poor (16/100), better than 79% of steel grades.
Sustainability4
Producing a kilogram of E80C-B2 takes about 34 MJ of energy and emits 2.6 kg of CO₂ — more than 82% of steel grades. Typical recycled content is 25%.
Manufacturability6
E80C-B2's machinability is good (55/100, better than 62% of steel grades); weldability very good (75/100).
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 steel family
Yield strength against density for every steel grade FabDigit runs. E80C-B2 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with E80C-B2
Is E80C-B2 easy to machine?
Machine after PWHT (≈190 HB); as-welded bainitic deposits at 250+ HB need carbide tooling and reduced speeds.
Can E80C-B2 be welded?
Gas-shielded (75-80 % Ar/CO₂ or CO₂), DCEP, preheat 150–250 °C, interpass ≤315 °C, PWHT 690 ± 15 °C for 1 h; use low-hydrogen practice and keep spools dry.
Can E80C-B2 be formed, bent or molded?
Not a wrought product — deposit shape is set by joint design; wire feeds well with V-knurled drive rolls and low feed pressure to avoid crushing the core.
E80C-B2 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 |
|---|---|---|
| Cstandard-carbon grade; the 'L' variant is ≤0.05 | 0.05 – 0.12 | 0.08 |
| Mn | ≤ 1.25 | 0.9 |
| Si | ≤ 0.8 | 0.45 |
| Cr | 1 – 1.5 | 1.25 |
| Mo | 0.4 – 0.65 | 0.5 |
| P | ≤ 0.03 | 0.01 |
| S | ≤ 0.03 | 0.01 |
| Fe | balance |
What surface finishes work on E80C-B2?
Slag/silicate islands brush off easily; deposit rusts like carbon steel, so shot-blast and apply high-temperature aluminium paint or insulate for service.
Surface treatments FabDigit runs on 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).
Organic Coating
Black / Phosphate
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Steel E80C-B2 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- W52030
- Also called
- AWS E80C-B2AWS E55C-B2
How much does E80C-B2 cost?
E80C-B2 is a premium-cost steel ($$$), cheaper than about 51% 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.
E80C-B2 — frequently asked
What is E80C-B2 used for?
E80C-B2 is typically used for boiler and pressure vessel welding, refinery high-temperature piping, steam power plant components and petrochemical reactor vessels. In short: 1.25Cr-0.5Mo code filler; 550 °C service deposit; standard-carbon B2 strength.
What is the yield strength of E80C-B2?
E80C-B2 has a typical yield strength of 505 MPa (73.2 ksi) and a tensile strength of 600 MPa (87 ksi) — stronger than 64% of steel grades. Strength varies by condition: see the 3 listed tempers.
Is E80C-B2 easy to machine?
Reasonably — machinability is rated good (55/100, better than 62% of steel grades). Machine after PWHT (≈190 HB); as-welded bainitic deposits at 250+ HB need carbide tooling and reduced speeds.
Can E80C-B2 be welded?
Yes — weldability is rated very good (75/100). Gas-shielded (75-80 % Ar/CO₂ or CO₂), DCEP, preheat 150–250 °C, interpass ≤315 °C, PWHT 690 ± 15 °C for 1 h; use low-hydrogen practice and keep spools dry.
What surface finishes work on E80C-B2?
Slag/silicate islands brush off easily; deposit rusts like carbon steel, so shot-blast and apply high-temperature aluminium paint or insulate for service.
Can E80C-B2 be formed, bent or molded?
Not a wrought product — deposit shape is set by joint design; wire feeds well with V-knurled drive rolls and low feed pressure to avoid crushing the core.
What is the maximum service temperature of E80C-B2?
E80C-B2 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 E80C-B2 PWHT and E80C-B2-AW?
PWHT is the default condition — the AWS A5.29 classification condition and the normal delivery state for Cr-Mo piping and vessel welds; use whenever code-required PWHT is applied. AW: only for non-code repairs or interim conditions — strength and hardness are much higher, toughness and hydrogen-crack resistance much lower. Yield strength is 505 MPa in PWHT versus 630 MPa in AW.
How much does E80C-B2 cost?
E80C-B2 is a premium-cost steel ($$$), cheaper than about 51% 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 A5.29/A5.29M — Low-Alloy Steel Electrodes for Flux Cored Arc Welding — American Welding Society (2010)
- ASME BPVC Section II Part C (SFA-5.29) — ASME (2023)
- ASM Handbook Vol.1 — Properties and Selection: Irons, Steels, and High-Performance Alloys (Cr-Mo steels) — ASM International (1990)
- ASM Handbook Vol.6 — Welding, Brazing and Soldering (Cr-Mo weldments) — ASM International (1993)
- Cr-Mo metal-cored / flux-cored wire weld-metal property sheets — Lincoln Electric / ESAB / Böhler Welding (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.