ASTM A677-16 Specification for Nonoriented Electrical Steel, Fully Processed Types

The ASTM A677 specification provides the precise criteria for completely processed, flat-rolled, nonoriented electrical steel that is principally intended for use in magnetic devices with commercial power frequencies. These electrical steels can be produced using basic oxygen, an electric furnace, or another method of steelmaking. They are low-carbon, silicon iron, or silicon-aluminum-iron alloys and have a specified maximum core-loss value. Read more about ASTM A677-16 Specification for Nonoriented Electrical Steel, Fully Processed Types below.

Talk to an Expert

ASTM A677-16 Specification for Nonoriented Electrical Steel, Fully Processed Types

TRUSTED BY

Precision-driven testing for dimensional accuracy and compliance

Overview
Scope, Applications, and Benefits
Test Process
Specifications
Instrumentation
Results and Deliverables

Overview

ASTM A677-16 specifies requirements for fully processed nonoriented electrical steel used in electromagnetic applications. These steels are designed to provide uniform magnetic properties in all directions, making them suitable for rotating machinery such as motors and generators.

This specification is widely used in the electrical and power industries. It ensures that electrical steel materials meet required magnetic performance, core loss limits, and dimensional tolerances for efficient energy conversion

Scope, Applications, and Benefits

Scope

ASTM A677 covers fully processed nonoriented electrical steel in sheet and strip form. The standard defines magnetic properties, mechanical characteristics, and dimensional tolerances for consistent performance.

The standard evaluates:

Core loss characteristics at specified frequencies
Magnetic flux density and permeability
Thickness and dimensional tolerances
Surface insulation and coating properties
Mechanical properties of electrical steel

Applications

Electric motors and generators
Transformers and inductors
Rotating electrical machinery
Energy conversion equipment
Industrial and power systems
Electrical laminations

Benefits

Ensures uniform magnetic properties in all directions
Reduces energy loss in electrical systems
Supports efficient motor and generator performance
Assists in material selection for electrical applications
Enables comparison of electrical steel grades

Test Process

Material Identification

Electrical steel grade and thickness are verified according to ASTM A677.

Magnetic Testing

Core loss and magnetic properties are measured using standard test methods.

Dimensional Inspection

Thickness and surface condition are evaluated for compliance.

Data Recording & Evaluation

Results are compared with ASTM A677 specifications for acceptance.

Technical Specifications

Parameter	Details
Applicable Materials	Nonoriented electrical steel sheets and strips
Thickness Range	~0.35 mm to 1.0 mm
Core Loss	~1.0 W/kg to 10 W/kg (frequency dependent)
Magnetic Flux Density	~1.5 T to 2.0 T
Test Frequency	50 Hz to 400 Hz
Surface Coating	Insulated coating for electrical performance

Instrumentation Used for Testing

Epstein frame test system
Single sheet tester
Flux meter
Wattmeter and power analyzer
Thickness measurement tools
Data acquisition system

Results and Deliverables

Core loss measurement data
Magnetic flux density results
Thickness and surface inspection
Material grade verification
Test condition summary
ASTM compliance report

Partnering with Infinita Lab for Optimal Results

Infinita Lab addresses the most frustrating pain points in the ASTM A677-16 testing process: complexity, coordination, and confidentiality. Our platform is built for secure, simplified support, allowing engineering and R&D teams to focus on what matters most: innovation. From kickoff to final report, we orchestrate every detail—fast, seamlessly, and behind the scenes.

Looking for a trusted partner to achieve your research goals? Schedule a meeting with us, send us a request, or call us at (888) 878-3090 to learn more about our services and how we can support you. Request a Quote

Frequently Asked Questions

ASTM A677-16 includes core loss, magnetic permeability, thickness, density, chemical composition, and surface insulation, ensuring nonoriented electrical steels meet performance requirements for magnetic applications under specified operating conditions.

ASTM A677-16 covers fully processed nonoriented electrical steels used in laminations for electrical equipment requiring uniform magnetic properties in all directions.

ASTM A677-16 defines core loss values, magnetic flux density, and electrical resistivity, ensuring efficient magnetic performance.

ASTM A677-16 materials are used in motors, generators, transformers, and electrical machinery requiring low energy loss and efficient magnetic behavior.

ASTM A677-16 defines properties under controlled conditions and may not account for fabrication processes, stresses, or operating conditions influencing magnetic performance in real applications.