SAE AMS4881D-2018 PDF
Name in English:
St SAE AMS4881D-2018
Name in Russian:
Ст SAE AMS4881D-2018
Original standard SAE AMS4881D-2018 in PDF full version. Additional info + preview on request
Full title and description
SAE AMS4881D — Nickel‑Aluminum‑Bronze, Martensitic, Sand, Centrifugal and Continuous Castings, 78Cu - 11Al - 5.1Ni - 4.8Fe; Quench Hardened and Temper Annealed. This aerospace material specification defines composition, casting forms, heat‑treatment (TQ50) and inspection/test requirements for this nickel‑aluminum‑bronze alloy used where a combination of high strength and hardness with some ductility and toughness is required.
Abstract
AMS4881D establishes chemical composition limits and technical requirements for the martensitic nickel‑aluminum‑bronze alloy in sand, centrifugal and continuous castings, prescribes quench‑hardening and temper annealing (TQ50) condition, defines lot and melt acceptance, and specifies required tests (chemical analysis, tensile specimens per ASTM E8/E8M, hardness and nondestructive inspections as applicable). The revision permits continuous castings and refines specimen and hardness requirements.
General information
- Status: Superseded (was reaffirmed 3 May 2018; later superseded by AMS4881E published 17 June 2025).
- Publication date: Reaffirmed 03 May 2018 (Revision D).
- Publisher: SAE International (SAE).
- ICS / categories: 77 — Metallurgy; relevant subgroups: 77.120 (Non‑ferrous metals) — Copper and copper alloys.
- Edition / version: Revision D (AMS4881D).
- Number of pages: 8 pages.
Scope
Applies to a martensitic nickel‑aluminum‑bronze alloy (composition similar to UNS C95520) supplied as sand, centrifugal or continuous castings. The specification covers chemical composition limits, heat‑treatment condition (quench hardened and temper annealed — TQ50), test specimen preparation, lot/melt definitions and required inspection/test methods for acceptance of castings. Typical applications are parts requiring a combination of high strength and hardness with retained ductility/toughness.
Key topics and requirements
- Chemical composition with minimum/maximum limits (examples: Al ≈10.5–11.5%, Ni ≈4.2–6.0%, Fe ≈4.0–5.5%; copper reported as remainder — see Table 1 in the specification).
- Permitted product forms: sand, centrifugal and continuous castings; definition of melt and lot for acceptance testing.
- Condition and heat treatment: quench hardened and temper annealed (designation TQ50).
- Mechanical/inspection requirements: tensile specimens (ASTM E8/E8M) machined from representative coupons, Rockwell hardness testing (ASTM E18), and applicable NDT (liquid penetrant, radiography, ultrasonic where specified).
- Ordering, acceptance and casting approval provisions (including requirements for casting reapproval and allowable exceptions as defined in the document).
Typical use and users
Used by aerospace and defense OEMs, casting suppliers, metallurgy and materials engineers, and quality/inspection personnel for qualification and procurement of nickel‑aluminum‑bronze cast components (e.g., wear rings, propeller hubs, high‑strength fittings and structural parts where corrosion resistance and strength are needed). Also referenced by procurement teams and testing laboratories performing acceptance tests specified by the AMS.
Related standards
Related AMS/ASTM documents commonly referenced in the specification include AMS2360 (room‑temperature tensile properties of castings), AMS2630 (ultrasonic inspection), AMS2750 (pyrometry), ASTM E8/E8M (tensile testing), ASTM E18 (Rockwell hardness), ASTM E478 (chemical analysis of copper alloys), and other AMS material specifications for aluminum‑bronze and nickel‑aluminum‑bronze alloys (for example AMS4880 and AMS4590 for related alloy forms).
Keywords
nickel‑aluminum‑bronze, AMS4881D, martensitic, castings, sand casting, centrifugal casting, continuous casting, TQ50, quench hardened, temper annealed, chemical composition, ASTM E8, Rockwell hardness, aerospace material specification.
FAQ
Q: What is this standard?
A: AMS4881D is an SAE aerospace material specification for a martensitic nickel‑aluminum‑bronze alloy supplied as sand, centrifugal or continuous castings, covering composition, heat treatment (TQ50) and acceptance testing.
Q: What does it cover?
A: It covers chemical composition limits, casting forms, heat‑treatment condition (quench hardened and temper annealed), requirements for test specimens and mechanical/hardness testing, lot/melt definitions, and inspection/acceptance provisions for the alloy.
Q: Who typically uses it?
A: Aerospace and defense OEMs, foundries and casting suppliers, materials and metallurgical engineers, procurement and quality/inspection laboratories use the standard to specify, produce, test and accept nickel‑aluminum‑bronze cast components.
Q: Is it current or superseded?
A: Revision D was reaffirmed on 3 May 2018, but has been superseded by AMS4881E published 17 June 2025. Users should refer to AMS4881E for the latest requirements or consult the cognizant engineering authority for allowed use of prior revisions.
Q: Is it part of a series?
A: Yes — AMS4881 is part of the AMS (Aerospace Material Specifications) family covering copper‑ and aluminum‑bronze alloys; related AMS documents (e.g., AMS4880, AMS4590) address similar nickel‑aluminum‑bronze chemistries in other product forms.
Q: What are the key keywords?
A: nickel‑aluminum‑bronze, martensitic, castings, quench hardened, temper annealed, TQ50, AMS4881D, composition, ASTM E8, Rockwell hardness.