Ultra-Pure Iron Disc (99.95% Fe) | Beilun Metals Precision-Engineered for Vacuum, Magnetic & Calibration Applications Product Overview Beilun Metals' ASTM A848-certified Pure Iron Discs combine ultra-low impurities (<500 ppm) with sub-micron surface finishes, designed for high-vacuum...
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Description
Ultra-Pure Iron Disc (99.95% Fe) | Beilun Metals
Precision-Engineered for Vacuum, Magnetic & Calibration Applications
Product Overview
Beilun Metals' ASTM A848-certified Pure Iron Discs combine ultra-low impurities (<500 ppm) with sub-micron surface finishes, designed for high-vacuum systems, electromagnetic shielding, and metrology standards. Produced via VIM-ESR (Vacuum Induction Melting + Electroslag Remelting) dual refining technology.
Critical Performance Advantages
Parameter
Beilun Disc
Industry Standard
Improvement
Surface Flatness
≤0.02 mm/m
≤0.1 mm/m
80% tighter
Non-Metallic Inclusions
ASTM E45 Class 0.5
Class 2.0
4x cleaner
Vacuum Outgassing Rate
3×10⁻⁹ Torr·L/s/cm²
1×10⁻⁸ Torr·L/s/cm²
70% lower
Diameter Tolerance
±0.05 mm (Ø50-300 mm)
±0.2 mm
75% stricter
Thermal Stability
±0.003% @ 500°C
±0.015%
5x better
Certified Composition Analysis
Third-party validated via GD-MS (Glow Discharge Mass Spectrometry):
Elemental Purity Profile (ppm)
Element
Beilun Disc
ASTM A848 Limit
Detection Method
Carbon (C)
18
≤50
LECO Combustion
Oxygen (O)
22
≤80
Inert Gas Fusion
Sulfur (S)
9
≤20
Infrared Absorption
Phosphorus (P)
12
≤30
ICP-OES
Manganese (Mn)
<5
≤15
AES
Total Metallic Impurities
415 ppm
≤800 ppm
GD-MS
Industrial Applications & Benefits
Industry
Application
Key Advantage
Semiconductor
Sputter target substrates
99.99% surface purity for film adhesion
Nuclear
Neutron calibration plates
Boron-controlled (<0.1 ppm)
Aerospace
Cryogenic seal interfaces
-196°C embrittlement resistance
Medical Imaging
MRI shimming components
μ-reluctivity ≤1.05 @ 1.5T field
Metrology
Mass reference standards
Density certified ±0.01% (7.874 g/cm³)
Advanced Technical Specifications
Property
Specification
Test Method
Vickers Hardness
55-65 HV10
ISO 6507-1
Thermal Conductivity
79.5 W/m·K
ASTM E1225
Magnetic Permeability
250 μH/m @ 1 Oe
IEC 60404-4
Surface Roughness
Ra ≤0.4 μm (both faces)
ISO 4287
Vacuum Compatibility
≤5×10⁻⁹ mbar·L/s
ASTM E595
Table 1: Machining Performance
Parameter
Beilun Disc
Generic Iron
Test Standard
Cutting Speed (m/min)
180-220
120-150
ISO 3685
Tool Life (pieces/edge)
8,500+
3,200
ASTM G99
Burr Height
≤10 μm
≤25 μm
DIN 4768
Table 2: Environmental Resistance
Test Type
Condition
Result
Standard
Salt Spray (5% NaCl)
500 hrs
Class 10 (No rust)
ASTM B117
Hydrogen Embrittlement
150°C H₂, 1000 hrs
≤2% strength loss
ASTM F1940
Cryogenic Toughness
-196°C Charpy V-notch
45 J
ISO 148-1
Customization Options
Parameter
Specifications
Diameter Range
20 mm – 600 mm (±0.02 mm)
Thickness
3 mm – 100 mm (±0.1 mm)
Edge Profile
Chamfered (0.3-1.0 mm), Radius
Surface Finish
Mirror (Ra ≤0.1 μm), Ground
Certification
RoHS, REACH, ITAR, ISO 13485
Quality Assurance & Packaging
Feature
Specification
Cleanroom Packaging
Class 100 environment, <5 particles/L
VCI Film
MIL-PRF-3420 compliant, 24-month rust-free
Laser Marking
Permanent LOT ID + QR code traceability
Compliance Documents
Material Certs (EN 10204 3.1/3.2)
Why Beilun Metals?
✅ Dual VIM-ESR Refining Process – Achieve 99.95%+ Fe purity
✅ In-House ISO 17025 Lab – Full traceability from melt to shipment
✅ Rapid Prototyping – 10-day lead time for custom geometries
✅ Global Certifications – ITAR, AS9100, NADCAP compliant
