Electrical steel price index monthly: the transformer bill of materials, delivered as rows

# one row per commodity per reference month
commodity        : mineral insulating oil (IEC 60296)
reference_month  : 2022-08
index_value      : 178.159     # 78 points above the April 2017 base
publication_date : <month-end stamp following the reference month>
currency         : EUR         # reporting is almost entirely euros

commodity        : GOES conventional
reference_month  : 2022-08
index_value      : <same release, own series level>

commodity        : GOES high grade
status           : SUSPENDED   # too few reporting companies - no current prints

# base mechanics: every series reads exactly 1.000 at its reference date
commodity        : GOES super high grade
reference_month  : 2017-04
index_value      : 1.000

Two things in those rows decide whether the series survives contact with a model. First, the base row is part of the data: because every series equals 1.0 at its reference date, percentage moves need no rebasing work on your side - subtract and divide. Second, stamps can disagree with themselves in the wild (one December 2024 release circulates stamped 31 January 2024), so delivered rows carry the reference_month resolved from release contents, not from listing labels. That cleaning pass ships done.

Five fields define the record, and the split is deliberate: one column identifies what moved, one carries the economics relative to base, and three make the row joinable across months, releases and currencies without guesswork. Definitions and examples ride beside every field in delivery, so nobody reverse-engineers column meaning from screen position.

Grain-oriented electrical steel is not hot-rolled coil with better manners. It is a narrow, capital-intensive grade made by a handful of mills, and it does not move one-to-one with the commodity boards everyone quotes. Those boards exist in the catalog too - SteelMint Prices & Indices runs daily and weekly assessments plus indices for iron ore, coking coal, billet, HRC and rebar across nine regions, and SteelBenchmarker Benchmark Prices averages twice-monthly prints for hot-rolled band, cold-rolled coil, plate and rebar across US, Western European and Chinese home markets plus world export - but neither quotes the GOES grade.

Three things, all structural rather than cosmetic.

The series reflect a range of contributor sources rather than any single supplier's prices. That makes them ideal benchmarks and useless as invoices - and it explains why an individual quote can move further in a quarter than the index did. Contributor-source aggregation smooths exactly the volatility individual mills pass through, so when a supplier's increase outruns the index, the delta is information about that supplier, not noise in the data. The publisher offers no guidance on using the indices in pricing; market operators remain free to set their own.

And one series is absent by design. GOES High Grade stopped printing because too few companies kept reporting - a governance guard against inferring any one firm's commercially sensitive position. Absent prints there are a decision, not missing data, and they double as a reading on how concentrated that supply base is.

UK ONS PRODCOM surveys annual UK manufacturers' sales across roughly 3,805 product codes - transformers, motors, generators and switchgear among them - with series reaching back to 2008 and explicit revision status on every row, so a demand assumption can be cited to a vintage rather than vibes.

Two engineering-context records round out the shelf. The IEC Standards Webstore resolves roughly 30,482 publications including 263 hits for 'power transformers' with newest records dated into August 2026, and EPRI - Power Grid Equipment Research surfaces about 359 transformer-related research records - between them explaining why the GOES grade carries a premium at all, from core-loss classes to the test procedures a compliant design must pass.

Procurement and sourcing leads walk into supplier meetings with the band already drawn: when the GOES line rose over the quarter a quote covers, the lowest outliers get discounted on evidence instead of instinct, and escalations get anchored to a published series instead of a bilateral hunch.

FP&A and equity analysts covering electrical equipment map index turns onto OEM gross-margin bridges. The 2021-2022 GOES repricing visible in the archive is the stress case every model needs, and it is in the data rather than in a conference anecdote.

Files, feeds, or straight into your warehouse. Daily, weekly, or hourly - your call.

The field dictionary travels alongside every pull, so the schema in your sample is the schema you ship against. Name the commodities, the geographies and the destination when you request a sample and the first cut comes back scoped to them.

Start with the T&D Europe Commodity Indices & Reports dataset product page - sample rows, the full field dictionary and coverage chips. Then continue the thread:

For the structured view, the best heavy-electrical-equipment datasets ranking scores all 18 primary records and the heavy-electrical-equipment data hub holds the full 30-record pool - every card delivered daily, weekly, or hourly, your call.