Search · Plot · Calibrate · Export — one workflow
103,000+ materials, every value traceable to its source — MIL-HDBK-5J, DOI-linked papers, official compliance lists. Ask in plain English, fit your own test curves, and export solver-ready cards to 11 CAE formats — or let your AI agent do it for you over MCP.
NewModel calibration — fit your own test curves, get a verdict, download the card103,000+ materials, 84 property types, 4,500+ curves, 22 regulations screened. Pick a tab to drill in.
Metals, polymers, ceramics, composites, and more — every property value linked back to the paper, handbook, or dataset it came from.
Oxides, nitrides, carbides, perovskites, bioceramics.
Steels, Ti, Ni superalloys, Al, Cu — temper variants included.
Si, GaN, SiC, GaAs, InP and 23K+ compounds — band gaps labelled measured or computed, effective masses.
PEEK, LCP, Nylon, PTFE, ABS, PC, UHMWPE, PLA, PMMA + OpenPoly.
CFRP, GFRP, aramid, sandwich, CMC, MMC — every MIL-HDBK-17 laminate and fabric system.
CoCr, Ti-13Nb-13Zr, Nitinol, HA, bioglass, pyrolytic carbon.
Sources we cite
Click any property value in MatWorld to see the exact handbook page, figure, or paper it came from. Compliance results are checked against the official European and California registries — never guessed from element composition.
Upload stress-strain, creep, relaxation or DMA data. MatWorld fits Johnson-Cook, Ogden, Mooney-Rivlin, Chaboche, Prony or Hill — and tells you whether the fit holds up before it writes a single solver card. The kind of calibration that used to mean a consultant or a week of scripting, for $20 a month, unlimited.
Drop, browse or paste CSV / TSV. Units are read from the header and can be corrected per channel — conversion happens once, in one place.
Temperature, strain rate and deformation mode per curve. A value in the file always wins over one typed in the workbench.
Johnson-Cook, Ogden, Mooney-Rivlin, Chaboche, Prony series or Hill. Candidate forms are ranked; the simplest adequate one is recommended.
PASS, CAUTION or REJECT with findings. Abaqus and ANSYS decks carry the valid range and every warning in their banner.
Illustrative fit. A REJECT gets no card, and a rejected fit costs you nothing.
Goodness of fit, identifiability, physical admissibility and the tested envelope — every fit is PASS, CAUTION or REJECT with named findings.
Native Abaqus and ANSYS cards where the syntax is verified and the data determines every field; a labelled coefficient block otherwise. Never an invented value.
Per-curve temperature, strain rate and deformation mode. Curves measured at different temperatures are never pooled into one parameter set with nothing to say so.
Setup is free with an account — upload, plot, correct units, choose a model. Running the fit is Pro, unlimited.
One sentence in. A ranked shortlist of engineering materials out — each with the value that met your bound, where it stands among the candidates, and the hottest temperature its data reaches.
Excerpt of a real answer — 233 candidates matched, top three shown. Pro · 20 searches a day.
Handbook alloys and tempers, polymers, laminates — not the 100,000 computed compounds, unless you ask for a computed property like band gap.
The value that met your bound, its rank among the candidates, how hot its data goes, and whether a number was inherited from the base alloy.
An empty answer lists which constraint to leave out and how many materials that unlocks. Every chip has an ×. Name an alloy and you get alternatives, with the alloy itself left out.
Pick a solver to see the actual rendered card alongside the diagnostics MatWorld runs before download. Your agent renders the same card over MCP.
| 1 | ** MatWorld CAE Material Export — Abaqus (.inp) |
| 2 | ** Source: MIL-HDBK-5J · DOI 10.xxxx · Table 5.4.1.0(b) |
| 3 | ** Material: Ti-6Al-4V plate · Basis: A · Form: Plate |
| 4 | ** |
| 5 | *MATERIAL, NAME=Ti_6Al_4V_Plate |
| 6 | ** Orthotropic elastic card from L/LT/ST orientation data. |
| 7 | *ELASTIC, TYPE=ENGINEERING CONSTANTS |
| 8 | 1.14e+11, 1.10e+11, 1.07e+11, 0.342, 0.342, 0.342, 4.40e+10, 4.40e+10, |
| 9 | 4.40e+10 |
| 10 | *DENSITY |
| 11 | 4430., |
| 12 | *PLASTIC |
| 13 | 8.80e+08, 0.00 |
| 14 | 9.50e+08, 0.015 |
| 15 | 1.02e+09, 0.05 |
| 16 | *EXPANSION, TYPE=ISO |
| 17 | 8.6e-06, |
| 18 | *CONDUCTIVITY |
| 19 | 6.7, |
| 20 | ** ───────────────────────────────────────────────────────── |
| 21 | ** Fatigue + fracture data |
| 22 | ** Fracture toughness K_IC: 75 MPa·√m |
| 23 | ** S-N curve (cycles → stress), 5 points: |
| 24 | ** Source: MIL-HDBK-5J · Figure 5.4.1.1.8(a) |
| 25 | ** 1.0e+03, 8.5e+08 |
| 26 | ** 1.0e+04, 6.5e+08 |
| 27 | ** 1.0e+05, 5.2e+08 |
| 28 | ** 1.0e+06, 4.1e+08 |
| 29 | ** 1.0e+07, 3.2e+08 |
| 30 | ** ───────────────────────────────────────────────────────── |
Plus six more native formats
Every property lists candidates with confidence, DOI, conditions, and basis. Pick the row the deck actually uses.
Toggle a property or change its source and the rendered deck updates instantly. What you see is what you download.
Unit mismatches, Poisson out of range, missing G in orthotropic, basis mixing — caught before you hit download.
MatWorld is a remote MCP server. Point Claude Code, Claude.ai, ChatGPT, Gemini, Cursor, or an agent built on the Anthropic, OpenAI or Gemini API at one URL and it can search by designation, read a full datasheet with every source, pull a curve, compare materials, screen 22 regulations, ask in plain English, or export a solver-ready CAE card — the same data, the same citations, the same notice.
https://api.matworld.ai/mcpSnippets show mw_YOUR_KEY until you generate a key.
claude mcp add --transport http matworld https://api.matworld.ai/mcp --header "Authorization: Bearer mw_YOUR_KEY"
claude mcp add --transport http matworld https://api.matworld.ai/mcp # then run /mcp inside Claude Code to sign in
search_materialsBy designation, UNS/AISI number, trade name, or keyword — fuzzy, with did-you-mean.
find_materialsA ranked shortlist with the numbers that justify each candidate. Same 20/day allowance as the search box.
get_materialIdentity, composition, lineage, and a per-property index — range per statistical basis and per method (measured vs computed), counts, and the conditions on file; nothing averaged — sized for a context window.
get_material_propertiesThe full datasheet rows behind a key, paged and filtered by form, temper, orientation, temperature, basis or method — every field, every source.
list_material_curvesWhat curves exist — type, conditions, point count, figure and source — without the points.
get_property_curveEvery point of one stress-strain, S-N fatigue, or property-vs-temperature curve, by id or conditions — never thinned.
compare_materialsTwo to four materials side by side, keyed by property, each value with its unit and source.
screen_compliance22 regulations as screened — RoHS, REACH SVHC, Prop 65, ITAR, and more — each status labelled with the published list it was validated against or as a rule-based estimate.
list_property_keysEvery key with its category, SI unit, and the material classes it applies to.
list_export_formatsThe 11 CAE formats — what each card carries, which keys it reflects, and its default unit profile.
export_cae_cardA solver-ready Abaqus, LS-DYNA, ANSYS, Nastran, Radioss or SolidWorks card returned as file text, sources and statistical basis in the header, with the resolver's picks and red-flag diagnostics.
Generate a personal key in Settings → Agent access, or let Claude sign in with your MatWorld account. Keys are personal and revocable.
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