SINT-D39 Standard for Sintered Magnetic Metal Materials in Industrial Manufacturing
1. Standard Overview
DIN 30910-4:2004 is a specialized standard published by the German Institute for Standardization (DIN) that specifies the technical delivery conditions for sintered magnetic metal materials. As Part 4 of the DIN 30910 series on sintered metals, it focuses on powder metallurgy-based magnetic materials, defining their chemical composition, physical properties, magnetic characteristics, mechanical performance, and delivery requirements. It applies to both soft magnetic and hard magnetic (permanent magnet) materials used in industrial manufacturing.
2. Material Classification & Composition
(1) Material Types
|
Category
|
Typical Materials
|
Primary Composition
|
Key Features
|
|
Soft Magnetic
|
Pure Fe, Fe-Si, Fe-Ni
|
Fe, Si (1-6%), Ni (30-80%)
|
High permeability, low coercivity, low losses
|
|
Hard Magnetic
|
AlNiCo, Sintered NdFeB, Ferrites
|
Fe, Co, Ni, Al, Nd, B
|
High coercivity, high remanence, permanent magnetism
|
(2) Key Chemical Requirements
- Fe-Si (Silicon Steel): 1–6% Si to reduce eddy current losses and increase resistivity.
- Fe-Ni (Permalloy): 30–80% Ni for extremely high initial permeability (μ > 50,000).
- Fe-P (Phosphorus Iron): 0.3–0.8% P to enhance corrosion resistance and permeability.
- Sintered NdFeB: Nd-Fe-B base, possibly with Co or Dy for improved temperature stability.
Impurity Control: Strict limits on sulfur (S), oxygen (O), etc., to prevent magnetic degradation.
3. Key Performance Metrics
(1) Magnetic Properties (Core Parameters)
|
Parameter
|
Soft Magnetic
|
Hard Magnetic
|
Test Standard
|
|
Permeability (μ)
|
500–50,000
|
1–10
|
IEC 60404-4
|
|
Coercivity (Hc)
|
<1 kA/m
|
10–1000 kA/m
|
IEC 60404-5
|
|
Remanence (Br)
|
0.5–1.5 T
|
0.8–1.4 T
|
IEC 60404-2
|
|
Max Energy Product (BHmax)
|
<10 kJ/m³
|
10–400 kJ/m³
|
IEC 60404-7
|
|
Hysteresis Loss
|
Low (AC applications)
|
High (permanent magnets)
|
IEC 60404-6
|
(2) Physical & Mechanical Properties
|
Property
|
Typical Range
|
Influencing Factors
|
|
Density
|
6.0–7.4 g/cm³
|
Sintering pressure/temp
|
|
Resistivity
|
10–50 μΩ·cm
|
Si/P content
|
|
Tensile Strength
|
100–300 MPa
|
Porosity/alloying
|
|
Hardness (HV)
|
50–150
|
Heat treatment
|
4. Industrial Applications
(1) Soft Magnetic Applications
- Motor & Transformer Cores
- Materials: Fe-Si, Fe-P
- Advantages: Low eddy current loss, ideal for high-frequency motors and efficient transformers.
- EMI Shielding
- Materials: Fe-Ni (Permalloy)
- Advantages: High permeability for electronic device interference suppression.
- Sensors & Relays
- Materials: Fe-Co (high saturation)
- Advantages: Fast response for current sensing and magnetic switches.
(2) Hard Magnetic (Permanent Magnet) Applications
- Permanent Magnet Motors (EVs, Drones)
- Materials: Sintered NdFeB
- Advantages: Ultra-high energy product (BHmax > 300 kJ/m³), compact size, high efficiency.
- Speaker & Headphone Magnets
- Materials: Ferrites, AlNiCo
- Advantages: Cost-effective, stable performance.
- High-Temperature Magnet Devices
- Materials: SmCo (Samarium Cobalt)
- Advantages: Heat resistance (>300°C), used in aerospace motors.
5. Material Selection Guide
|
Application Need
|
Recommended Material
|
Rationale
|
|
High-frequency, low loss
|
Fe-Si (3–6% Si)
|
High resistivity reduces eddy currents
|
|
Ultra-high permeability
|
Fe-Ni (Permalloy)
|
μ > 50,000
|
|
Strongest permanent magnet
|
Sintered NdFeB
|
BHmax > 300 kJ/m³
|
|
Corrosion resistance
|
Fe-P (Phosphorus Iron)
|
Phosphorus improves oxidation resistance
|
|
High-temperature stability
|
SmCo
|
Stable > 300°C
|
Product Tags:
|
|
SINT-D39 Sintered Magnetic Metal Materials for Industrial Machinery Images
|
