{
  "schema_version": "pinto_matsci_material_property_receipt_manifest/v1",
  "manifest_id": "pinto-matsci-material-selector-receipts-2026-06-30",
  "source_surface": "/matsci/material-selector",
  "render_contract": "pinto_matsci_material_selector/v1",
  "evidence_grade": "reference_prior",
  "redaction_posture": "public_teaching_values",
  "freshness": "2026-06-30",
  "jurisdiction": "paretosol.com public MatSci teaching demo",
  "authority_boundary": "teaching and scout comparison only; not design authority",
  "forbidden_use": "Do not use these indicative values as procurement, certification, safety approval, or final design data.",
  "property_receipts": [
    {
      "schema_version": "pinto_matsci_material_property_receipt/v1",
      "receipt_id": "matprop-teaching-steel-4130-001",
      "material_id": "steel_4130",
      "material_name": "4130 steel",
      "display_symbol": "St",
      "family": "metal",
      "grade_alloy_caveat": "generic teaching prior; heat treatment and supplier data vary",
      "properties": {
        "density_g_cm3": 7.85,
        "youngs_modulus_gpa": 205,
        "yield_strength_mpa": 435,
        "specific_stiffness": 26.1
      },
      "source_class": "hand_curated_reference_prior",
      "uncertainty_posture": "indicative_nominal_value",
      "freshness": "2026-06-30",
      "authorizes_design": false
    },
    {
      "schema_version": "pinto_matsci_material_property_receipt/v1",
      "receipt_id": "matprop-teaching-aluminum-6061t6-001",
      "material_id": "aluminum_6061_t6",
      "material_name": "6061-T6 aluminum",
      "display_symbol": "Al",
      "family": "metal",
      "grade_alloy_caveat": "generic teaching prior; temper and product form matter",
      "properties": {
        "density_g_cm3": 2.7,
        "youngs_modulus_gpa": 69,
        "yield_strength_mpa": 276,
        "specific_stiffness": 25.6
      },
      "source_class": "hand_curated_reference_prior",
      "uncertainty_posture": "indicative_nominal_value",
      "freshness": "2026-06-30",
      "authorizes_design": false
    },
    {
      "schema_version": "pinto_matsci_material_property_receipt/v1",
      "receipt_id": "matprop-teaching-ti64-001",
      "material_id": "titanium_grade_5",
      "material_name": "Ti-6Al-4V",
      "display_symbol": "Ti",
      "family": "metal",
      "grade_alloy_caveat": "generic teaching prior; anneal, product form, and spec control required",
      "properties": {
        "density_g_cm3": 4.43,
        "youngs_modulus_gpa": 114,
        "yield_strength_mpa": 880,
        "specific_stiffness": 25.7
      },
      "source_class": "hand_curated_reference_prior",
      "uncertainty_posture": "indicative_nominal_value",
      "freshness": "2026-06-30",
      "authorizes_design": false
    },
    {
      "schema_version": "pinto_matsci_material_property_receipt/v1",
      "receipt_id": "matprop-teaching-cfrp-quasi-001",
      "material_id": "carbon_fiber_epoxy_quasi",
      "material_name": "quasi-isotropic CFRP",
      "display_symbol": "CF",
      "family": "composite",
      "grade_alloy_caveat": "range prior; layup, fiber volume, cure, damage, and coupon axis dominate",
      "properties": {
        "density_g_cm3": 1.6,
        "youngs_modulus_gpa": 70,
        "yield_strength_mpa": 600,
        "specific_stiffness": 43.8
      },
      "source_class": "hand_curated_range_prior",
      "uncertainty_posture": "range_prior_requires_coupon",
      "freshness": "2026-06-30",
      "authorizes_design": false
    },
    {
      "schema_version": "pinto_matsci_material_property_receipt/v1",
      "receipt_id": "matprop-teaching-polycarbonate-001",
      "material_id": "polycarbonate",
      "material_name": "polycarbonate",
      "display_symbol": "PC",
      "family": "polymer",
      "grade_alloy_caveat": "generic teaching prior; grade, moisture, temperature, creep, and impact modifier matter",
      "properties": {
        "density_g_cm3": 1.2,
        "youngs_modulus_gpa": 2.4,
        "yield_strength_mpa": 63,
        "specific_stiffness": 2.0
      },
      "source_class": "hand_curated_reference_prior",
      "uncertainty_posture": "indicative_nominal_value",
      "freshness": "2026-06-30",
      "authorizes_design": false
    },
    {
      "schema_version": "pinto_matsci_material_property_receipt/v1",
      "receipt_id": "matprop-teaching-nylon-66-001",
      "material_id": "nylon_6_6",
      "material_name": "nylon 6/6",
      "display_symbol": "Ny",
      "family": "polymer",
      "grade_alloy_caveat": "generic teaching prior; moisture, temperature, creep, filler, and conditioning matter",
      "properties": {
        "density_g_cm3": 1.14,
        "youngs_modulus_gpa": 2.8,
        "yield_strength_mpa": 75,
        "specific_stiffness": 2.5
      },
      "source_class": "hand_curated_reference_prior",
      "uncertainty_posture": "indicative_nominal_value_requires_environment_check",
      "freshness": "2026-06-30",
      "authorizes_design": false
    }
  ],
  "alignment_rules": [
    "every selector material must have exactly one receipt",
    "receipt_id must match between selector data and property receipt",
    "density modulus yield and specific stiffness must match rendered selector values",
    "all receipts must set authorizes_design=false",
    "display_symbol must match the compact chart label"
  ]
}