ER80S-B8 TIG Filler Rod & MIG Wire
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AWS A5.28 ER80S-B8 TIG Filler Rod & MIG Wire Supplier in India
Nicorex Alloys is an ISO 9001 and ISO 14001 certified, Mumbai-based supplier and stockist of ER80S-B8 chrome-moly welding wire, classified under AWS A5.28 / ASME SFA-5.28. Our facility holds every heat ship with an MTC 3.1 per EN 10204.
ER80S-B8, also known as P9 welding wire or 9Cr filler rod, is specifically designed for high-chromium applications that do not use vanadium or niobium modifications. This 9% chromium content offers the best protection against oxidation and hydrogen damage for this type of alloy. The wire is engineered to maintain structural integrity under high hydrogen partial pressures at elevated temperatures. The weld deposit is able to attain a tensile strength of 550 MPa (80 ksi) and a yield strength of 470 MPa (68 ksi) when it is subjected to the post-weld heat-treated (PWHT) condition. There is a requirement for an obligatory PWHT at 730–760 degrees Celsius in order to guarantee the final metallurgical qualities of the joint. This is due to the fact that the as-welded deposit is completely martensitic.
Nicorex Alloys stocks TIG rods ranging from 1.6 to 3.2 mm and MIG spools between 0.9 and 1.6 mm. SAW wire ships as EB8 per AWS A5.23. All welding positions are supported by DCEN for GTAW with 100% argon and DCEP for GMAW. Preheating at 200°C (400°F) minimum is mandatory. Typical uses include refinery hydrogen service piping, high-temperature steam lines, and petrochemical reactor components that require thermal stability.
ER80S-B8 Welding Wire Specifications
Refer to the following table for the standard classifications, AWS designations, and available wire dimensions for ER80S-B8 welding wire.
| AWS Classification | ER80S-B8 (previously ER505 per A5.9-93) |
|---|---|
| Welding Processes | GTAW (TIG), GMAW (MIG), SAW |
| Polarity | DCEN (GTAW) / DCEP (GMAW) |
| Shielding Gas | 100% Ar (GTAW); CO₂ or Ar/CO₂ mix (GMAW) |
| Wire Diameters |
TIG: 1.6–3.2 mm MIG: 0.9–1.6 mm SAW: 2.4–3.2 mm |
AWS Classification Explained: What Does ER80S-B8 Mean?
Use this guide to understand the industry coding system and what each part of the ER80S-B8 name signifies.
| Prefix / Designator | Meaning & Technical Significance |
|---|---|
| ER | Electrode / Rod: Solid wire suitable for both TIG (GTAW) and MIG (GMAW) welding. |
| 80 | Tensile Strength: Indicates a minimum tensile strength of 80,000 psi (550 MPa). |
| S | Solid Wire: Confirms the filler is a solid cross-section rather than flux-cored. |
| B8 | 9Cr-1Mo Alloy: A chemical composition featuring 9% chromium and 1% molybdenum. |
ER80S-B8 is a robust 9Cr-1Mo filler formulated for use in refineries and power generation facilities. It offers exceptional creep resistance and oxidation protection under intense temperatures, rendering it the essential option for welding P9/T9 pipes and high-pressure steam components.
Chemical Composition of ER80S-B8 Weld Deposit (%)
The table below shows the chemical composition of the ER80S-B6 weld deposit and the percentage of each element:
| Specification | Carbon (C) | Manganese (Mn) | Silicon (Si) | Chromium (Cr) | Molybdenum (Mo) | Nickel (Ni) | Phosphorus (P) | Sulphur (S) | Copper (Cu) |
|---|---|---|---|---|---|---|---|---|---|
| AWS A5.28 Req. (%) | 0.10 max | 0.40–0.70 | 0.50 max | 8.00–10.50 | 0.80–1.20 | 0.50 max | 0.025 max | 0.025 max | 0.35 max |
Chromium at 8.00–10.50% drives oxidation resistance and Nelson curve H₂ performance. ER90S-B9 shares the same Cr/Mo range; the difference lies in V, Nb, and N.
All-Weld-Metal Mechanical Properties of ER80S-B8
The following table details the mechanical property requirements for ER80S-B8 all-weld metal.
| Specification | Tensile Strength | Yield Strength (0.2%) | Elongation |
|---|---|---|---|
| AWS A5.28 Min | 550 MPa (80 ksi) | 470 MPa (68 ksi) | 17% |
ER80S-B8 delivers a minimum 80,000 psi tensile strength and 17% elongation. This high-strength, 9Cr-1Mo filler ensures durable, creep-resistant welds in high-pressure refinery systems.
Base Metal Compatibility and ASME Section IX Data for ER80S-B8
Consult this table to ensure this filler wire is the correct match for your specific grade of industrial piping.
| Base Metal Spec | Grade | UNS | P-Number |
|---|---|---|---|
| SA-335 / A335 | P9 | S50400 | P5B Group 1 |
| SA-213 / A213 | T9 | S50400 | P5B Group 1 |
| SA-182 / A182 | F9 | — | P5B Group 1 |
| SA-217 / A217 | C12 | J82090 | P5B Group 1 |
| SA-387 / A387 | Gr.9 Cl.1/2 | — | P5B Group 1 |
Recommended Welding Parameters for ER80S-B8 TIG & MIG Wire
Follow these professional settings to achieve the best results and highest quality when using this TIG and MIG wire.
| Wire Diameter | Amperage (A) | Voltage (V) | Gas |
|---|---|---|---|
| 0.9 mm (0.035″) | 50–70 | 10–12 | 100% Argon |
| 1.2 mm (0.045″) | 70–100 | 10–12 | 100% Argon |
| 1.6 mm (1/16″) | 100–125 | 12–15 | 100% Argon |
| 2.4 mm (3/32″) | 125–175 | 15–20 | 100% Argon |
| 3.2 mm (1/8″) | 175–250 | 15–20 | 100% Argon |
Hold preheat at 200°C minimum throughout; never let the joint cool below preheat between passes. If PWHT is delayed, apply a hydrogen bake-out at 200–300°C for 2–4 hours.
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Industrial Welding Applications of ER80S-B8 (9Cr-1Mo) Filler Wire
The following are the industrial applications of ER80S-B8 (9Cr-1Mo) filler wire:
- Petroleum Refining - Hydrogen Service: Used in high-pressure hydrotreater and catalytic reformer piping. It is the standard choice for safely handling intense hydrogen gas at high temperatures where lower-grade steels would likely crack or fail.
- High-Temperature Steam Service: Found in steam pipes and valves within older power plants. Due to the steam production's heat and stress, it retains its shape and resists surface rusting.
- Petrochemical Reactors: Used in big reactors and heat exchangers. It is used because its high chromium concentration shields the metal from sulphur and hydrogen mixes during chemical processing.
- Repair Welding: Used to repair refinery pipework and cast parts. It is vital for keeping older, reliable systems leak-free and structurally sound without replacing pipe sections.
Storage and Handling of ER80S-B8 TIG Welding Rod
Store in original sealed packaging at 15–30°C, humidity below 50% RH. Low-hydrogen practice is critical; the 9Cr-1Mo deposit is more air-hardening than 5Cr grades, raising hydrogen cracking risk. Keep packaging sealed until use; reseal partially used spools. Shelf life is indefinite in sealed packaging. MTC 3.1 per EN 10204 accompanies each lot.
Available Forms, Diameters and Packaging of ER80S-B8 Filler Wire
See this list for all available wire sizes and spool types to find the right fit for your equipment.
| Form | Diameters | Packaging |
|---|---|---|
| TIG Rod (GTAW) | 1.6, 2.0, 2.4, 3.2 mm | 5 kg tubes, 914/1000 mm |
| MIG Spool (GMAW) | 0.9, 1.2, 1.6 mm | D200 (12.5 kg), D300 (15 kg) |
| SAW Wire (EB8) | 2.4, 3.2 mm | 25 kg coils |
All wire ships with MTC 3.1 per EN 10204. Matching sets (ER80S-B6 wire + E8018-B6 electrode) are available for a complete 5Cr-0.5Mo project supply.
How to Order ER80S-B8 Welding Filler Wire from Nicorex Alloys
Please provide the following 10 details to place an order for ER80S-B8 Welding Filler Wire:
- AWS Classification — ER80S-B8 per AWS A5.28 / ASME SFA-5.28
- Diameter — GTAW: 1.6 mm / 2.4 mm / 3.2 mm; GMAW: 0.9 mm / 1.2 mm
- Quantity — GTAW: specify kg or packs; GMAW: specify spool count
- Testing / Certification — MTC 3.1/3.2; Hardness Report; PWHT record; TPI
- Base Metal — ASTM A335 P9 / A182 F9 / A213 T9 / A217 C12 — specify grade
- Material Grade — 9Cr-1Mo; UNS S50480; W.Nr. 1.7386; EN ISO 21952-A: W CrMo9
- Packaging & Certification Scope — GTAW: rigid plastic tubes; GMAW: moisture-resistant sealed cartons — standard MTC 3.1 or extended scope; specify
- Applicable Code — ASME VIII, IX, B31.1, B31.3; IBR — specify
- Delivery — Domestic / International — specify port or address
- Remarks — 9Cr base metal only; creep / high-temperature service — confirm application
Frequently Asked Questions
What is the Difference between ER80S-B8 and ER90S-B9?
ER80S-B8 is a conventional 9Cr-1Mo with no vanadium or niobium. ER90S-B9 is the modified P91 filler with V, Nb, and controlled N. These form MX-type carbonitride precipitates, giving 2–3× the creep-rupture life at 550–600°C. ER80S-B8 is for P9/T9/F9; ER90S-B9 is for P91/T91/F91. Using B8 on P91 leads to premature creep failure.
What Preheat and PWHT are Required for ER80S-B8 Welds?
Post-weld heat treatment (PWHT) at 730–760°C (1345–1400°F) for one hour per 25 mm of thickness (minimum 30 minutes) follows a minimum 200°C (400°F) warmup. The as-welded hardness exceeds 350 HV; hence, PWHT needs to be added to get it below 241 HV.
Can ER80S-B8 be used for Dissimilar Joints between P9 and Carbon Steel?
Possible but not preferred. ER80S-B8 on the carbon steel side creates a high-Cr HAZ that is difficult to temper.
What Spool Sizes are Available for ER80S-B8?
MIG wire is available in D200 (12.5 kg) and D300 (15 kg) spools, while TIG rods are supplied in 5 kg cylinders with lengths of 914 or 1000 mm. Furthermore, all products are distributed with an MTC 3.1 certificate, and SAW (EB8) wire is available in 25 kg coils.
When should ER80S-B8 not be used?
ER80S-B8 should not be used for P91/T91/F91. Do not use ER80S-B6 for 5Cr or ER90S-B3 for 2.25Cr. Never without PWHT. The temperature should not exceed 595°C, where P91 creep strength is required. It should not be used for dissimilar joints to austenitic stainless steels.