BMS Specification Corrosion Resistant Steel Controls & Processes

BAC 5619

Heat Treat of Corrosion Resistant Steel

BMS Specification – BAC 5619 Treatment
Heat Treatment of Corrosion Resistant Steel | Boeing Process Specification

AS9100D / ISO 9001

Mill Test Reports

2–4 Week Delivery

877-237-6822

Quick Specification Facts

Spec Number BAC 5619

Material Corrosion Resistant Steel

Spec Type BMS (Boeing Process Specification)

Category Controls & Processes, Specifications

Process Heat Treatment

Condition Heat Treated per BAC 5619

Applicable Forms Bars, Wire, Forgings, Tubing, Rings, Sheet/Plate

Certification AS9100D / ISO 9001 with full MTR traceability

Specification Overview

BAC 5619 is a Boeing process specification that defines the requirements for the heat treatment of corrosion resistant steel. Issued as part of the Boeing Material Standard (BMS) family of specifications, BAC 5619 covers the annealing, solution treating, stress relieving, and other thermal processing operations applied to corrosion resistant (stainless) steel parts and materials used in Boeing commercial and defense aerospace programs.

The specification ensures that corrosion resistant steel components achieve the correct metallurgical condition following thermal processing, providing maximum corrosion resistance, optimized mechanical properties, and dimensional stability. Materials and parts processed per BAC 5619 must comply with specific time-at-temperature requirements, controlled atmosphere or furnace conditions, cooling rate specifications, and resulting property verification requirements. Aero-Vac supplies corrosion resistant steel that meets and supports BAC 5619 processing requirements with full documentation and AS9100D certification.

Applicable Material Forms

Bars

Wire

Forgings

Tubing

Rings

Sheet / Plate

BAC 5619 applies to corrosion resistant steel components across a wide range of product forms used in Boeing aerospace programs. All material supplied by Aero-Vac is provided with full traceability to mill certifications confirming the base material chemistry and initial condition, supporting downstream BAC 5619 heat treatment processing. Contact our materials specialists for specific grade and form availability.

Heat Treatment Process Overview

Process Type	Applicable Grades	Typical Temperature Range	Cooling Method
Solution Anneal	300 Series (Austenitic)	1900°F – 2100°F (1038°C – 1149°C)	Water quench or rapid air cool
Annealing	400 Series (Martensitic/Ferritic)	1350°F – 1650°F (732°C – 899°C)	Controlled air or furnace cool
Stress Relief	All Grades	Per grade / specification requirements	Air cool
Precipitation Hardening	PH Grades (17-4PH, 15-5PH, A-286)	Per condition / H-code requirements	Air cool
Hardening & Tempering	400 Series (Martensitic)	Per grade and hardness requirements	Oil or air quench, then temper

Process parameters shown are representative. Consult the current issue of BAC 5619 for precise temperature, time, atmosphere, and cooling requirements for each grade and condition. Aero-Vac provides full mill test reports (MTRs) with certified chemistry for every order to support BAC 5619 compliance documentation.

Key Properties & Specification Details

Property / Attribute	Details
Specification Number	BAC 5619
Issuing Organization	Boeing Commercial Airplanes (Boeing Process Specification)
Specification Type	BMS – Boeing Process Specification (Controls & Processes)
Process Covered	Heat Treatment of Corrosion Resistant Steel
Applicable Materials	Corrosion Resistant (Stainless) Steel – 300 Series, 400 Series, Precipitation Hardening Grades
Process Types	Solution Annealing, Annealing, Stress Relieving, Precipitation Hardening, Hardening & Tempering
Applicable Forms	Bars, Wire, Forgings, Tubing, Rings, Sheet, Plate, Structural Components
Pyrometry Requirements	Furnace temperature uniformity and calibration per applicable pyrometry standards
Documentation Required	Certificate of Conformance, Heat Treatment Records, MTRs
Certification Available	AS9100D / ISO 9001, Certificate of Conformance, MTR

Typical Applications

Boeing Aerospace Structures: Corrosion resistant steel components for commercial and defense aircraft requiring heat treatment per Boeing process specifications, including structural fittings, brackets, fasteners, and welded assemblies.

Hydraulic & Fluid System Components: Pump bodies, valve components, manifolds, and tubing assemblies in corrosion resistant steel that require controlled heat treatment to achieve optimal corrosion resistance and mechanical properties.

Precision Machined Parts: Stress-relieved corrosion resistant steel components requiring dimensional stability after machining, heat treatment, and finishing operations on Boeing-program parts.

Defense & Military Aerospace: Components for Boeing defense platforms including rotorcraft, military transport, and defense systems requiring corrosion resistant steel processed to Boeing process specifications.

High-Temperature & Corrosive Environments: Parts operating in elevated temperature or corrosive service environments where solution-annealed or precipitation-hardened corrosion resistant steel provides the required combination of strength and oxidation/corrosion resistance.

Frequently Asked Questions – BAC 5619

What is BAC 5619 and what does it cover?

BAC 5619 is a Boeing process specification that covers the heat treatment of corrosion resistant steel. It is part of the Boeing Material Standard (BMS) family of specifications under the Controls & Processes category. The specification defines the requirements for thermal processing operations—including solution annealing, annealing, stress relieving, precipitation hardening, and hardening & tempering—applied to corrosion resistant (stainless) steel parts and materials used in Boeing commercial and defense aerospace programs. Compliance with BAC 5619 ensures that processed steel components achieve the correct metallurgical condition, corrosion resistance, and mechanical properties required for Boeing program use.

What types of corrosion resistant steel does BAC 5619 apply to?

BAC 5619 applies to a broad range of corrosion resistant (stainless) steel grades used in Boeing aerospace applications. This includes austenitic stainless steels (300 series such as 304, 316, 316L, 321, and 347), ferritic and martensitic stainless steels (400 series), and precipitation hardening (PH) grades such as 17-4PH, 15-5PH, and A-286. Each grade has specific heat treatment requirements defined within the specification, including temperature ranges, hold times, atmosphere controls, and cooling rate requirements. Aero-Vac stocks and supplies material across all of these grades with full traceability to support BAC 5619 processing requirements.

Does Aero-Vac supply material certified to support BAC 5619 processing?

Yes. All corrosion resistant steel material supplied by Aero-Vac is fully traceable to mill test reports (MTRs) confirming chemical composition and mechanical properties. We are AS9100D/ISO 9001 certified with a 99.6% quality rating. Every order ships with certificates of conformance, material certifications, and chemical/mechanical test reports required to support downstream BAC 5619 heat treatment processing and Boeing program documentation packages. Electronic delivery of all documentation is available for fast turnaround. If your program requires additional special process certifications or Boeing-specific documentation, our quality team can coordinate as needed.

What forms and sizes of corrosion resistant steel does Aero-Vac stock for BAC 5619 applications?

Aero-Vac maintains inventory of corrosion resistant steel in multiple product forms suitable for BAC 5619 heat treatment applications, including bars (round, flat, and hex), wire, tubing (seamless and welded), forgings, rings, sheet, and plate. We carry a range of standard sizes across multiple grades and can provide custom-cut lengths, discs, and blocks from our in-house processing facility at the Port of Kalama. For non-standard dimensions or specialty grades, our team can source from our global supplier network. Contact us with your specific grade, size, and form requirements and we will provide a prompt quote with availability and lead time.

What are the typical lead times for corrosion resistant steel for BAC 5619 applications?

In-stock corrosion resistant steel material is typically available for same-day or next-day shipment. For custom-cut or specially processed orders, our standard lead time is 2–4 weeks—significantly faster than the industry average of 8–12 weeks. Specialty forgings or items requiring mill production may require 4–8 weeks depending on quantity and form. We prioritize urgent Boeing program and aerospace defense requirements and will always provide honest, upfront delivery estimates. Rush processing is available on select items.

Can Aero-Vac provide value-added processing for corrosion resistant steel used in BAC 5619 programs?

Yes. Aero-Vac operates a complete in-house processing facility at our Port of Kalama location. For corrosion resistant steel materials used in BAC 5619 programs, we offer precision saw cutting (including disc and ring cutting), surface grinding, trepanning, turning, milling, and heat treatment. We also provide comprehensive mechanical and non-destructive testing services in-house. Having all capabilities under one roof allows for faster turnaround, tighter quality control, and reduced overall cost compared to using multiple vendors. Contact us to discuss your specific processing and documentation requirements for your Boeing program.

Need BAC 5619 compliant material or a custom quote?

Our corrosion resistant steel specialists can provide fast pricing, availability, and technical guidance for your BAC 5619 requirements.