Load-bearing structures and pressure boundaries
Carbon steels, HSLA, alloy steels, stainless, precipitation-hardening, maraging and tool-steel families organized by strength, toughness, corrosion, temperature and manufacturability.
Metals & Alloys · Level 3 Engineering Gateway
Steels & Stainless Steels
Carbon steels, HSLA, alloy steels, stainless, precipitation-hardening, maraging and tool-steel families organized by strength, toughness, corrosion, temperature and manufacturability.
Grade / chemistry controlledHeat treatment & product form controlledNumeric properties source-gated
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Primary Engineering Functions
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Wear-, tool- and drivetrain components
Carbon steels, HSLA, alloy steels, stainless, precipitation-hardening, maraging and tool-steel families organized by strength, toughness, corrosion, temperature and manufacturability.
Corrosion-resistant piping, vessels and fasteners
Carbon steels, HSLA, alloy steels, stainless, precipitation-hardening, maraging and tool-steel families organized by strength, toughness, corrosion, temperature and manufacturability.
Cryogenic/high-temperature or fatigue-critical hardware
Carbon steels, HSLA, alloy steels, stainless, precipitation-hardening, maraging and tool-steel families organized by strength, toughness, corrosion, temperature and manufacturability.
Alloy / Process / Qualification Control
| Control area | Engineering content |
|---|---|
| Representative alloys / grades | Low-carbon and medium-carbon steels; HSLA; Cr-Mo alloy steels; 304/316 austenitic stainless; 410/420 martensitic stainless; duplex stainless; 17-4PH; maraging and tool steels. |
| Processing variables | Hot/cold rolling, forging, casting, normalizing, annealing, quench-and-temper, solution treatment/aging, welding, machining and surface treatment. |
| Failure / degradation modes | Yield/fatigue, brittle fracture, hydrogen embrittlement, stress-corrosion cracking, pitting/crevice corrosion, sensitization, wear and weld/HAZ degradation. |
| Verification & qualification | Chemistry/grade, heat treatment, microstructure, tensile/yield/elongation, fracture/fatigue where required, hardness, impact toughness, corrosion, weld procedure and NDE. |
Related Metals Families
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Aluminum Alloys
Wrought and cast aluminum families spanning non-heat-treatable and precipitation-hardenable systems for lightweight structures, thermal hardware, transportation and aerospace.
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Titanium Alloys
Commercially pure, alpha, alpha-beta and beta titanium families for high specific strength, corrosion resistance, fatigue performance and elevated-temperature aerospace or biomedical service.
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Nickel & Cobalt Superalloys
Nickel- and cobalt-base alloy families engineered for creep, oxidation, corrosion and strength retention in turbines, combustors, reactors and severe hot-section service.
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Copper & Conductive Alloys
High-conductivity copper, precipitation-strengthened copper alloys, copper-nickel and traditional brasses/bronzes for electrical, thermal, joining and corrosion-controlled service.
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Phase 5.2CAT 02 review candidate