Compendium

Engineering Tier 3 — Family Indexes

3 min read

Engineering Tier 3 — Family Indexes

Encyclopedic discovery layer for engineering. Where Tier 1 deep notes teach foundational topics, Tier 3 family indexes catalogue the full universe of variants — every steel grade, every fastener style, every IC package, every welding process, etc.

🎯 Engineering Tier 3 complete: 46 / 46 family-index notes, ~18,470 lines (2026-05-15, gap-fills 2026-05-16).

Materials taxonomy

StatusFamilyFileLines
✅Steel grades (ASTM / AISI / EN / JIS / GB)steel-grades394
✅Aluminum alloys (1xxx-7xxx + cast)aluminum-alloys405
✅Stainless steels (austenitic/ferritic/martensitic/duplex/PH)stainless-steels338
✅Copper alloys (brass / bronze / BeCu / CuNi)copper-alloys243
✅Titanium alloys (CP / α / α-β / β / medical)titanium-alloys325
✅Polymers (thermoplastic/thermoset/elastomer/fiber)polymers-taxonomy511
✅Composites (CFRP/GFRP/AFRP + MMC + CMC)composites-taxonomy419
✅Engineering ceramics (oxide/non-oxide/glass)ceramics-taxonomy303
✅Semiconductor materials (Si, GaAs, GaN, SiC, InP)semiconductor-materials344

Mechanical components

StatusFamilyFileLines
✅Fasteners — full taxonomyfasteners-taxonomy393
✅Thread standards — UN/M/ACME/Tr/NPT/BSPthread-standards370
✅Bearings (RE/plain/fluid-film/magnetic)bearings-taxonomy498
✅Gears — spur/helical/bevel/worm/harmonic/cycloidalgears-taxonomy406
✅Couplings & shaft connectorscouplings-taxonomy337
✅Springs — compression/extension/Belleville/wavesprings-taxonomy559
✅Seals — gasket/O-ring/lip/mechanical/labyrinthseals-taxonomy385
✅Structural shapes — W/S/HP/M/C/L/HSS + EUstructural-shapes402

Electrical / electronic

StatusFamilyFileLines
✅Electric motor taxonomyelectric-motor-taxonomy454
✅Op-amp variantsop-amp-variants295
✅Semiconductor packages (DIP/SO/QFN/BGA/WLCSP)semiconductor-packages423
✅Battery chemistries — Li-ion/NiMH/lead/Na-ionbattery-chemistries479
✅Connector familiesconnector-families353
✅PCB substrates — FR-4 / Rogers / IMS / DBCpcb-substrates318
✅Passive components — R / C / Lpassive-components301

Manufacturing processes

StatusFamilyFileLines
✅Welding processes — SMAW/GMAW/FCAW/GTAW/SAW/LBW/EBW/FSWwelding-processes448
✅Additive manufacturing taxonomy (ISO 52900)additive-manufacturing-taxonomy428
✅Casting processes — sand/investment/HPDC/centrifugalcasting-processes371
✅Forming processes — rolling/forging/extrusion/stampingforming-processes264
✅Machining processes — turn/mill/grind/EDM/WJ/lasermachining-processes318
✅Surface treatments — anodize/plate/PVD/CVD/peensurface-treatments252
✅Joining — braze/solder/adhesive/mechanicaljoining-taxonomy365

Thermal / fluid

StatusFamilyFileLines
✅Heat-transfer correlationsheat-transfer-correlations619
✅Pipe schedules & fittings (ASME B16/B36)pipe-fittings302
✅Pumps taxonomy (API 610 + ANSI + PD)pumps-taxonomy369
✅Valves taxonomy (gate/globe/ball/butterfly/PRV)valves-taxonomy366
✅Refrigerants — CFC/HCFC/HFC/HFO/natural + GWPrefrigerants358

Standards & references

StatusFamilyFileLines
✅Engineering standards bodies — ISO/IEC/ASTM/IEEE/SAE/ASMEstandards-bodies356
✅Engineering codes by discipline — IBC/Eurocode/BPVC/NECengineering-codes422
✅Engineering units & conversions (SI + imperial)units-conversions408

Cross-cutting / energy / aerospace (gap-fills 2026-05-16)

StatusFamilyFileLines
✅NDT methods — VT/PT/MT/UT/PAUT/RT/CT/ET/AE/IR/Leakndt-methods523
✅Photovoltaic cells — c-Si TOPCon/HJT/IBC + CdTe + perovskitephotovoltaic-cells361
✅Wind turbine types — HAWT/VAWT, drivetrains, offshorewind-turbine-types357
✅Jet engine types — turbojet/turbofan (GTF)/turboprop/turboshaft/rocketjet-engine-types389
✅Tribology — friction, wear, lubrication, EHL, DLC/MoS₂/PTFEtribology524
✅Hydrogen energy & fuel cells — SMR/electrolysis (AEL/PEM/SOEC) + PEMFC/SOFChydrogen-fuel-cells514
✅Energy storage systems — PHS/Li-ion/VRFB/iron-air/flywheel/CAES/LAES/thermalenergy-storage-systems405
✅Mechatronics integration — MCU/RTOS choice + fieldbus + HIL + ISO 26262mechatronics-integration366
✅Acoustics & noise control — dB + STC/NRC/RT + absorbers + ANC + EV pedestrianacoustics-noise-control732

Wave 18 additions (2026-05-22)

StatusFamilyFile
✅Bearings deep — rolling/plain/fluid-film/magnetic/foil/linear/air; ABEC + ISO P + dynamic load + Sommerfeld + AMBbearings-catalog-deep
✅Sensors catalog — optical (CMOS/LiDAR/ToF/event/IR/hyperspectral) + mechanical (strain/IMU/encoder) + pressure + temperature + humidity + gas + flow + bio + magneticsensors-catalog

Wave 19 additions (2026-05-23)

StatusFamilyFile
✅Pumps catalog — centrifugal (API OH/BB/VS classes, ANSI B73) + PD rotary/reciprocating + specialty (canned/mag-drive/cryo/jet/ram/screw) + API 682 seal piping plans + HI standards + OEM linespumps-catalog
✅Valves catalog — linear (gate/globe/needle/plug/diaphragm/pinch) + rotary (ball/butterfly/plug) + check + PRV/PSV + rupture disks + control trim/Cv/Kv + FCI 70-2 leak classes + actuation (manual/pneumatic/electric/hydraulic/solenoid) + API/ASME/ISO standards + OEM linesvalves-catalog
✅Fasteners catalog — threaded (bolts/screws/studs) + nuts + washers + pins + rivets + captive (PEM/Helicoil/KEENSERT) + thread standards (UN/M/ACME/Tr/NPT/BSP) + strength grades (SAE J429/ASTM F3125/ISO 898-1/A193/A320/ISO 3506) + coatings (Zn/HDG/Dacromet/Geomet/Magni/PTFE) + OEMsfasteners-catalog

How to use

  • Read Engineering/Tier 1 deep notes for foundational engineering knowledge.
  • Browse Tier 3 family indexes to discover what alternatives exist when picking a material, component, or process.
  • Cross-reference Robotics/ for application context.
  • Cross-reference Languages/Tier3 for description-formats and CAD/specification languages.

53 items under this folder.