Steel material equivalents: 6,600 grades from 42 standards

Coverage

Holdings per standard

Bar length is the designation count on a linear scale, and every row links to its standard. Standards with no browsable listing are left out rather than shown empty: the internal Werkstoffnummer index, which has none of its own, and one whose issuing body we could not establish.

Composition

The families, drawn from the composition

Every material with both a chromium and a nickel figure — 3,346 of them — straight from the composition table. Each dot is the midpoint of that grade's specified range; nothing is modelled, and the clusters fall out of the numbers.

1.4xx stainless grades — 454
2.4xx nickel and cobalt alloys — 153
All other number classes — 2,739

Read left to right. At the origin sit the unalloyed and low-alloy steels, where chromium and nickel are residuals, not additions. The dense band at 16–19 % chromium is the stainless family splitting on nickel — ferritic and martensitic along the floor, austenitic lifted to 8–14 %. Above the scale change, the nickel-base alloys. Grades whose nickel is given only as “rest” carry no number and are not plotted.

Widest coverage

The grades that appear in the most standards

A coverage ranking, not a popularity one: ordered by how many standards name each grade, then by total designations. That is a property of our data, not of demand — we hold no search history for this catalogue yet. When we do, this becomes a real most-requested list and will say so.

Material no.	EN name	AISI / SAE	UNS	Standards	Designations
1.8159	51CrV4	6145	G61500	28	73
1.0038	S235JR	Gr.36	K01500	27	152
1.4006	X12Cr13	410	S41000	27	145
1.0044	S275JR	1020	G10200	27	130
1.4541	X6CrNiTi18-10	321	S32100	26	175
1.4404	X2CrNiMo17-12-2	316L	S31603	26	147
1.7218	25CrMo4	4130H	H41300	26	111
1.7225	42CrMo4	4140	G41400	26	95
1.0601	C60	1060	G10600	26	92
1.6582	34CrNiMo6	4340	G43400	26	84
1.7220	34CrMo4	4130	G41300	25	159
1.0402	C22	1020	G10200	25	94
1.0503	C45	1043	G10430	25	93
1.7131	16MnCr5	5115	G51150	25	78

Counted across the 41 browsable standards only. Where a grade carries several designations inside one standard, this table shows one of them; the detail page lists all of them.

Browse

Categories by material count

The 12 largest real categories by material count, then the catch-all bucket — the biggest entry in the catalogue, and shown for exactly that reason. All 6,600 materials are reachable from this block; none sits outside the 49 categories.

Others1,754These are grades the legacy import never classified, not a family with something in common. For most of them this is the only category path there is, which is why it is shown rather than hidden.

Definition

What cross-standard equivalence actually means

Cross-standard equivalence means two designations from different standards describe the same steel — or a steel close enough to substitute. It is not one relationship but three.

The same grade, recorded twice: A Werkstoffnummer and its EN name are one grade written down twice inside a single standards system. Nothing is being judged here — the two are the same entry.
Two standards, overlapping limits: Two national standards specifying overlapping composition ranges. In most applications they interchange, but the limits are not identical and the mechanical requirements differ.
A practical approximation: Asserted by a supplier or a reference work, with no standards body behind it. Useful, and worth showing, but it is somebody's opinion about substitution rather than a specification.

Every cross-reference here is labelled with which of the three it is, and where it came from. Approximations stay flagged — check one against the mill certificate before you quote it as identical.

10,099Same-grade designations

From our own standards mapping. Grade identity, not a judgement call.

18,607Approximate matches

Gathered from 63 third-party reference sources. Flagged everywhere they appear — verify before quoting.

555AI-researched claims, unverified

Proposed by automated research across 155 grades, not yet checked against a standard. Shown, because hiding them would not remove them from the data.

Enquiry

Grade not in the list?

Send us the standard you work to, or the spec sheet you were handed. We identify the grade and name the equivalents we can back up.

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