ASME SB-381 Titanium Alloy Forgings — Specification, Grades & Supply

ASME SB-381 defines the requirements for titanium and titanium alloy forgings supplied in the annealed condition. The standard covers 39 forging grades—from commercially pure titanium to high-strength alpha-beta alloys—used in aerospace, marine, medical, chemical processing, oil & gas, and high-performance industrial applications. If you need repeatable quality, full traceability, and short lead times on ASME SB-381 forgings, you’re in the right place.

What ASME SB-381 Covers

• Scope: Chemical composition, melt practice, quality levels, heat treatment (annealed), mechanical properties, microstructure, surface condition, and test methods for titanium forgings, forging stock, and flash-welded rings.

• Forms: Discs, blocks, rings, hubs, shafts, and near-net shapes, plus stock for subsequent forging or machining.

• Certification: Supplied with MTRs showing heat/lot, chemistry, tensile results, NDE (when specified), and conformance to ASME SB-381.

Popular SB-381 Grades & Where They’re Used

• Commercially Pure (CP) Grades — e.g., F-1 / F-2: Maximum corrosion resistance, excellent formability; used for seawater systems, desalination, heat-exchangers, chemical service, and clean-processing hardware.

• Alpha-Beta Alloys — e.g., F-5 (Ti-6Al-4V / Grade 5): High strength-to-weight, fatigue performance, and good corrosion resistance; ideal for aerospace structure, rotating parts, fasteners, medical components, and high-performance marine parts.

• High-Temperature / Specialty Alloys: Selected grades support creep resistance and thermal stability for turbomachinery and exhaust environments.

Tip: Moving from plate-machined parts to forgings can improve grain flow, align properties with the load path, and reduce material waste.

Mechanical & Quality Requirements (Overview)

• Condition: Annealed unless otherwise specified; ensures stable properties and machinability.

• Tensile Properties: Minimum UTS / 0.2% yield / elongation set by grade and section size; longitudinal and, where required, transverse tests.

• Microstructure & Cleanliness: Alpha/beta phase balance and freedom from deleterious contamination verified; surface contamination must be removed.

• Ultrasonic / NDE: UT and other NDE when ordered to detect internal discontinuities—especially for critical aerospace and pressure components.

• Grain Flow: Forging reductions and directions controlled for strength along principal stress axes.

• Dimensional Control: Forging tolerances per drawing/PO; machining allowances coordinated to minimize waste.

Note: Exact values are grade- and size-dependent; your MTR governs.

Typical Applications of ASME SB-381 Forgings

• Aerospace: Compressor rings, hubs, discs, fasteners, landing-gear components, structural fittings.

• Marine & Desalination: Corrosion-resistant pump parts, flanges, valve bodies, propulsor components.

• Medical & Pharma: Biocompatible housings, clean-service manifolds, surgical hardware (grade-dependent).

• Oil & Gas / Chemical: Sour-service compatible components, valves, and flanges with superior corrosion performance.

• Industrial / Performance: Lightweight rotating elements, high-load brackets, and drive components.

How We Supply ASME SB-381

• Near-Net & Rough Machined: Rings, discs, blocks, hubs, and custom geometries to minimize your machining time.

• Value-Add: Precision saw-cutting, rough/finish machining, UT/NDE, PMI, mechanicals, corrosion tests, and export crating.

• Documentation: Full MTRs, heat traceability, EN 10204 3.1 or 3.2 (when required), and project data packs.

ASME SB-381 vs Related Titanium Standards

Purchasing Checklist (Copy/Paste Into Your RFQ)

• Standard & Grade: “ASME SB-381, Grade F-__ (e.g., F-2, F-5)”

• Form & Size: Ring/Disc/Block/Hub (OD/ID/Height or L×W×T, plus machining allowance)

• Condition: Annealed (default)

• Testing: Tensile, UT/NDE class, microstructure, hardness (if required)

• Docs: MTR, conformity statement, EN 10204 level, special marking/packaging

• End Use: Aerospace / Marine / Medical / Chemical (to optimize processing)

Quality Full Work

Titanium Metals specializes in high-quality titanium materials and components for critical industries. Every product is manufactured with precision, tested for strength, corrosion resistance, and purity.

100% Work Satisfication

We deliver premium-grade titanium metals engineered for high performance and long-term reliability. Every product is manufactured with strict quality controls, precise dimensions, and flawless finishing to match international standards.