Material Simulator MCP Server

No-key MCP server for Material Simulator's public steel API. It exposes task-named tools for Fe-Fe3C equilibrium states, educational eutectoid TTT/CCT kinetics, sourced phase boundaries, measured datasets and glossary explanations.

npx material-simulator-mcp

No API key, signup or configuration is required. By default the server calls https://materialsimulator.com/api/v1. For local development only, set MATERIAL_SIMULATOR_BASE_URL.

Claude Desktop

{
  "mcpServers": {
    "material-simulator": {
      "command": "npx",
      "args": ["material-simulator-mcp"]
    }
  }
}

Tools

interpret_steel_state

Interpret the equilibrium state of plain-carbon steel at a given carbon content and temperature: stable phases, microstructure constituents (pearlite, proeutectoid ferrite or cementite), lever-rule phase mass fractions, qualitative mechanical property tendencies and typical applications. Use for questions like "what phases does 0.45% carbon steel have at 700 C", "what is the microstructure of slowly cooled eutectoid steel", or "why is high-carbon steel brittle". Educational equilibrium model (Fe-Fe3C, 0-2.14 wt% C, 20-1147 C) with explicit assumptions, refusal boundaries and verification needs in every response. Does NOT predict quenching or cooling-rate effects — use interpret_continuous_cooling or interpret_isothermal_hold for that.

interpret_continuous_cooling

Interpret what forms when eutectoid plain-carbon steel (~0.76 wt% C) is cooled at a constant rate to room temperature: fractions of pearlite, bainite, martensite and retained austenite, via Scheil additivity over a published TTT dataset and Koistinen-Marburger martensite kinetics. Accepts an explicit cooling rate (0.005-2000 C/s) or a named quench preset: furnace, air, oil, or water. Use for questions like "what happens if I quench eutectoid steel in oil", "how fast must steel cool to become fully martensitic", or "will air cooling give pearlite". Educational tier, eutectoid composition only; every response carries the assumed process history, assumptions, refusals (including section-size effects and other compositions) and verification needs.

interpret_isothermal_hold

Interpret an isothermal hold (TTT / austempering-style treatment) of eutectoid plain-carbon steel: quench to a hold temperature, hold for a given time, then quench to room temperature. Returns transformation start/finish times at that temperature, the JMAK transformed fraction, and product fractions (coarse/fine pearlite, upper/lower bainite, martensite, retained austenite) at the hold and after final quench. Use for questions like "what forms if steel is held at 350 C for 100 seconds" or "how long until transformation finishes at 600 C". Educational tier, eutectoid composition only, with explicit process history, assumptions, refusals and verification needs.

get_phase_boundaries

Get the A1, A3 and Acm transformation temperatures of the Fe-Fe3C phase diagram for a given carbon content, with the sourced curve model shown (Andrews 1965 sqrt-of-carbon A3 shape normalized to the diagram's fixed points; Acm interpolated over published anchor points — sources and anchor tables included in the response, not a black box). Use for questions like "at what temperature does 0.3% carbon steel become fully austenitic" or "what is the A3 temperature of C45". Omit the carbon parameter to get the fixed points (G, S, E) and full curve model.

lookup_measured_steel_data

Look up MEASURED (not modeled) steel datasets transcribed from published sources, each with full citation, license, ready-made attribution string and extraction provenance down to the table or figure of origin. Covers dilatometric CCT hardness data for named steel heats, continuous-cooling phase fractions, isothermal/parametric cooling kinetics, and historical digitized TTT data (including the founding 1930 Davenport & Bain eutectoid dataset) — sources are CC-BY or public domain. Use when the user needs real measured hardness or transformation values with a citable source rather than a model estimate — e.g. "what measured hardness does S960MC reach at 30 C/s". Call without arguments for the current list of available datasets (the list grows over time); pass dataset_id for full records.

get_steel_glossary

Get a structured glossary of steel phases, microstructure constituents and related terms (ferrite, austenite, cementite, pearlite, bainite, martensite and more), each explained at three levels: simple, technical and scientific. English, Slovak and Czech. Use when explaining metallurgy concepts at an audience-appropriate depth.

Resources

• materialsimulator://overview
• materialsimulator://kinetics-model-card
• materialsimulator://schemas/material-state

Tool results pass through the public API JSON body as structured content and pretty-printed text. Refusals, verification needs, assumptions, disclaimers, license fields and source attribution are not summarized or rewritten by this server.