ER80S-B2 Filler Rod
COREWELD 80SB2 is a low-alloy steel filler metal supplied as an ER80S-B2 filler rod for welding compatible chromium-molybdenum steels. The 1.25% chromium and 0.5% molybdenum balance give the deposit working strength at elevated temperatures and resistance to creep under sustained thermal load. Fabricators specify this grade for plant, pressure equipment and industrial piping built from Cr-Mo base metals. The welding procedure, preheat, and heat treatment follow the governing construction code rather than the consumable alone.
COREWELD 80SB2 Product Datasheet
The COREWELD 80SB2 datasheet carries what procurement needs before an order goes out: AWS classification, chemical composition limits, mechanical property requirements, available dimensions, and packaging details. Download it and check every figure against your approved welding procedure.
Understanding ER80S-B2 Filler Rod
ER80S-B2 falls under the low-alloy steel classification under AWS A5.28. The wire carries 1.20 to 1.50% chromium and 0.40 to 0.65% molybdenum, which is why fabricators pair it with 1Cr-0.5Mo and 1.25Cr-0.5Mo base metals in elevated-temperature service. Chromium supports oxidation resistance. Molybdenum holds strength at temperature and slows creep deformation across long service intervals. Filler metal selection isn’t the only variable: preheat, interpass control, and post-weld heat treatment all depend on base material grade, thickness, and the applicable construction code. Your approved welding procedure specification and the project documentation establish the exact requirements.
Technical Specifications of COREWELD 80SB2
Product details for COREWELD 80SB2 appear below. Confirm each entry against the official datasheet before raising a purchase order, since dimensions and packaging formats differ by product form.
| Specification | Details |
| Brand | COREWELD 80SB2 |
| Product Name | ER80S-B2 Filler Rod |
| AWS Classification | ER80S-B2 (UNS K20900) |
| Material Type | Low-Alloy Chromium-Molybdenum Steel |
| Nominal Alloying Elements | Chromium and Molybdenum |
| Welding Processes | TIG (GTAW); MIG (GMAW) only if the corresponding product form is available |
| Applicable Standard | AWS A5.28 / ASME SFA-5.28, subject to certification |
| Available Diameters | 1.6 mm, 2.0 mm, 2.4 mm, and 3.2 mm (or 0.035 in to 1/8 in) |
| Rod Lengths | 914 mm (36 inches) standard for TIG rods |
| Packaging | 5 kg (11 lb) or 10 kg plastic/cardboard tubes for TIG rods; D200/D300 spools for MIG wire |
| Base Material Compatibility | 1Cr-0.5Mo and 1.25Cr-0.5Mo steels, subject to the approved welding procedure |
Chemical Composition and Mechanical Properties of ER80S-B2
Chromium and molybdenum provide high-temperature scaling and creep resistance above 400°C, supported by deoxidising elements. This precise chemical balance gives ER80S-B2 robust tensile strength, superior creep-rupture performance, and reliable impact toughness under stress.
Chemical Composition of ER80S-B2
| Element | Composition |
| Carbon (C) | 0.07 to 0.12% |
| Chromium (Cr) | 1.20 to 1.50% |
| Molybdenum (Mo) | 0.40 to 0.65% |
| Manganese (Mn) | 0.40 to 0.70% |
| Silicon (Si) | 0.40 to 0.70% |
| Phosphorus (P) | 0.025% max |
| Sulphur (S) | 0.025% max |
Mechanical Properties of ER80S-B2 Weld Metal
| Property | Value |
| Tensile Strength | 550 MPa (80 ksi) minimum |
| Yield Strength | 470 MPa (68 ksi) minimum |
| Elongation | 19% minimum |
| Impact Properties | Not a classification requirement under AWS A5.28 |
| Hardness | Not specified by AWS A5.28; set by the code or procedure where required |
ER80S-B2 TIG Rod vs. MIG Wire
Product form separates the two. An ER80S-B2 TIG rod arrives as a straight cut length that the welder introduces into the pool, while the torch holds the arc from a tungsten electrode under argon shielding. Root runs, thin-wall tube, and position work favour control level. An ER80S-B2 MIG wire runs off a spool and feeds continuously through the nozzle at a set wire speed, lifting deposition rate on heavier sections and long seams. Equipment differs as well: TIG requires high-frequency starting and amperage control at the torch or pedal, and MIG for a wire feeder with mixed shielding gas. A shared classification doesn’t mean both forms are stocked.
ER80S-B2 TIG Rod Applications
- Superheater and reheater tube welding in coal-fired and gas-fired boilers
- Pressure vessel shells and heads fabricated from ASTM A387 Grade 11 plate
- Refinery and petrochemical process piping in ASTM A335 P11 and P12 grades
- Turbine casings, steam chests, and high-temperature valve bodies
- Header welds and heat exchanger tube-to-tubesheet joints
- Hydrocracker and hydrotreater equipment operating in sulphur-bearing service
Manufacturing Process of ER80S-B2 TIG Rod
- Material Selection: Mills screen the base steel for residual elements, because copper, tin, and antimony pose a risk of temper embrittlement.
- Alloying and Melting: Chromium and molybdenum enter the melt under controlled conditions that keep the analysis inside the AWS A5.28 band.
- Forming Processes: Hot rolling, drawing and intermediate annealing reduce the rod to finished diameter, followed by surface cleaning, straightening and cutting to length.
- Composite Filler Metal Production: Alternative routes sheath alloy powder within a steel strip, reaching the same deposit chemistry through a different product form.
Key Benefits of COREWELD 80SB2 Filler Metal
The chromium-molybdenum system defines what COREWELD 80SB2 does well. Deposit chemistry matches 1.25Cr-0.5Mo base metals, so weld and parent material respond alike to stress relief and to service temperature. Creep rupture strength and oxidation resistance hold within the range the applicable material specification covers, and no further. Argon shielding on the TIG route keeps oxygen pickup low. Capped phosphorus and sulphur at 0.025% each support toughness after post-weld heat treatment. None of this substitutes for procedure qualification: performance in a given joint rests on the approved WPS, the heat treatment applied, and the service conditions the code stipulates.
Why Choose COREWELD 80SB2 ER80S-B2 Filler Rod?
COREWELD 80SB2 carries a documented AWS A5.28 classification and a published datasheet covering composition limits, mechanical requirements, available diameters, and packaging. Buyers working to ASME construction codes need that paperwork for procedure qualification and for the material test report file. We supply the rod against confirmed specifications, which keeps substitution out of Cr-Mo fabrication work. Questions on base metal compatibility and product form go to our applications team. Read the official datasheet before finalising the filler metal selection for any pressure-retaining joint.
ER80S-B2 Filler Rod Supply and Technical Support
Enquiries move faster when the request carries the full picture. Provide the base steel grade, the welding process, the joint thickness, and the specification or code section governing the work. Our team then confirms rod diameters, cut lengths, packaging format, and bulk quantities against current datasheet listings. Technical assistance covers consumable selection for compatible Cr-Mo grades and guidance on documentation requirements. Send your enquiry with the base material grade and applicable project specification for a quotation on the ER80S-B2 filler rod supply.
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Frequently Asked Questions About ER80S-B2 Filler Rod
What is ER80S-B2 filler rod used for?
Welding 1Cr-0.5Mo and 1.25Cr-0.5Mo chromium-molybdenum steels in elevated-temperature service. Boiler superheaters, refinery piping, pressure vessels, and turbine components account for most of the demand.
What is the difference between ER80S-B2 TIG rod and MIG wire?
Form and feeding method. TIG rods come as cut lengths that the welder feeds by hand, while MIG wire runs off a spool through the gun at a set feed rate.
Which steel grades are compatible with ER80S-B2 filler metal?
ASTM A335 P11 and P12 pipe, A213 T11 and T12 tube, A182 F11 forgings, and A387 Grade 11 plate. Confirm compatibility through the approved welding procedure.
What are the chromium and molybdenum contents of ER80S-B2?
Chromium runs 1.20 to 1.50% and molybdenum 0.40 to 0.65% under AWS A5.28. Both limits apply to the wire analysis.
Does ER80S-B2 welding require preheating or post-weld heat treatment?
Yes. Preheat and interpass temperatures of at least 150°C apply to most Cr-Mo work, and post-weld heat treatment near 620 to 690°C follows wherever the construction code calls for it.
Which standard applies to ER80S-B2 filler rod?
AWS A5.28, adopted by ASME as SFA-5.28. The UNS designation for the deposit is K20900.