SAE J2515-2017 PDF

Full title and description

SAE J2515-2017 — "High Temperature Materials for Exhaust Manifolds". This SAE technical report provides guidance on design considerations and the availability and characteristics of high‑temperature ferrous materials (cast and wrought) for exhaust manifold applications. It summarizes applicable manufacturing methods and mechanical, chemical, and thermophysical properties relevant to manifold design.

Abstract

This report summarizes the selection and use of heat‑resistant ferrous materials for automotive exhaust manifolds, describing types of manifolds in current engine designs, material options (selected cast and wrought alloys), manufacturing practices, and the important material properties that influence manifold performance and durability. The document was stabilized in December 2017 and updates an earlier 1999 edition.

General information

• Status: Stabilized / Current.
• Publication date: December 20, 2017 (J2515_201712; original issued August 1999, J2515_199908).
• Publisher: SAE International.
• ICS / categories: Ground vehicle standard / Materials for automotive exhaust systems; subjects include casting alloys, heat‑resistant alloys, ferrous alloys, and materials identification.
• Edition / version: 2017 edition (document number J2515_201712).
• Number of pages: 19 pages (technical report length).

Scope

Provides a concise reference for automotive engineers and designers on high‑temperature material options for exhaust manifolds. The scope covers design considerations, ranges of applicability for different manifold types, availability and characteristics of selected cast and wrought ferrous alloys, manufacturing methods used for manifold components, and descriptions of mechanical, chemical, and thermophysical properties important to selection and performance. The report is intended as a practical summary for mature technologies unlikely to change rapidly.

Key topics and requirements

• Overview of manifold types and typical service conditions (temperature, thermal cycling, corrosion exposure).
• Selection guidance for high‑temperature ferrous materials: cast iron grades, SiMo and other ductile irons, high‑temp stainless and alloyed steels.
• Material properties that govern performance: creep/strength at temperature, oxidation resistance, thermal expansion, fatigue resistance, and chemical composition limits.
• Manufacturing and processing considerations: casting vs. wrought fabrication, heat treatment, machining, and joining methods affecting high‑temperature behavior.
• Design tradeoffs: cost, manufacturability, durability, and compatibility with engine exhaust systems and turbochargers.

Typical use and users

Used by automotive powertrain and materials engineers, component designers, metallurgists, suppliers of cast and wrought exhaust components, and quality/validation teams when specifying or evaluating materials for exhaust manifolds and related high‑temperature components. Also useful for purchasers and standards compliance personnel who need a concise summary of appropriate material choices and characteristics.

Related standards

Related SAE standards address specific high‑temperature casting materials and requirements (for example, SAE J2582 for high‑temperature ductile iron castings used in exhaust applications) and other material and testing specifications referenced for manifold components. J2515_2017 supersedes the 1999 J2515 edition; users commonly consult both the J2515 report and material‑specific SAE standards when specifying parts.

Keywords

High temperature materials; exhaust manifolds; casting alloys; heat‑resistant alloys; ferrous alloys; materials selection; material properties; SiMo ductile iron; manufacturing methods.

FAQ

Q: What is this standard?

A: SAE J2515‑2017 is a technical report titled "High Temperature Materials for Exhaust Manifolds" that summarizes material options, properties, and design/manufacturing considerations for automotive exhaust manifolds.

Q: What does it cover?

A: It covers design considerations for exhaust manifolds, descriptions of commonly used high‑temperature cast and wrought ferrous materials, manufacturing methods, and the key mechanical, chemical, and thermophysical properties that affect performance and selection.

Q: Who typically uses it?

A: Automotive engineers, materials and metallurgical specialists, component designers, suppliers of manifold castings and forgings, and quality or standards personnel involved in part specification and validation.

Q: Is it current or superseded?

A: The 2017 edition (document number J2515_201712) is the stabilized/current version published December 20, 2017; it updates and replaces the original 1999 issuance (J2515_199908). Users should check with SAE or authorized distributors for any notices or later revisions.

Q: Is it part of a series?

A: J2515 is a standalone SAE technical report focused on exhaust manifold materials, but it is used in conjunction with other SAE material and testing standards (for example, SAE J2582 for high‑temperature ductile iron castings) when detailed material specifications or test methods are required.

Q: What are the key keywords?

A: Exhaust manifolds, high‑temperature materials, casting alloys, heat‑resistant alloys, ferrous alloys, SiMo ductile iron, material properties, manufacturing methods.