Steel Grade Index
Browse commonly specified engineering steels by designation, product family and service.
Structural & pressure grades
General carbon structural steel.
HSLA structural steel.
Pressure-vessel plate.
Pipe & pipeline grades
Seamless pressure/high-temperature carbon pipe.
General pressure/mechanical pipe.
General line pipe.
Medium-strength line pipe.
High-strength line pipe.
High-strength transmission line pipe.
Cr-Mo elevated-temperature pipe.
Higher-alloy Cr-Mo pressure pipe.
Creep-strength-enhanced high-temperature pipe.
Carbon, alloy & bearing grades
Low-carbon general engineering steel.
Medium-carbon shaft and machinery steel.
Cr-Mo alloy steel.
Ni-Cr-Mo high-strength alloy steel.
High-carbon chromium bearing steel.
Stainless grades
General-purpose austenitic stainless.
Low-carbon weld-friendly 304 family.
Mo-bearing austenitic stainless.
Low-carbon welded process grade.
Titanium-stabilized austenitic stainless.
Niobium-stabilized austenitic stainless.
Martensitic heat-treatable stainless.
Higher-carbon martensitic stainless.
Ferritic stainless.
Precipitation-hardening stainless.
High-strength duplex stainless.
High-alloy duplex for severe chloride service.
How to use this index
Use the individual grade pages for a quick engineering overview, then verify the latest governing ASTM/ASME, API, SAE/AISI, EN, JIS or project specification before design or procurement. Grade equivalence should always be approved against full standard requirements, not name similarity alone.
