Aerospace series - Blast media - Brown corundum, without iron

This standard specifies the characteristics of brown corundum without iron used as blast media for aerospace applications.

Luft- und Raumfahrt - Strahlmittel - Normalkorund, braun, eisenfrei

Diese Norm legt die Kenndaten von braunem, eisenfreiem Korund fest, der als Strahlmittel für Anwendungen in der Luft  und Raumfahrt vorgesehen ist.

Série aérospatiale - Produit de projetage - Corindon brun sans fer

Aeronavtika - Peskalna sredstva - Rjavi korund, brez železa

Ta standard opredeljuje značilnosti rjavega korunda brez železa, uporabljenega kot peskalno sredstvo za uporabo v aeronavtiki.

General Information

Status
Published
Publication Date
01-Jun-2010
ICS
49.040 - Coatings and related processes used in aerospace industry
Technical Committee
I13 - Imaginarni 13
Current Stage
6060 - National Implementation/Publication (Adopted Project)
Start Date
12-May-2010
Due Date
17-Jul-2010
Completion Date
02-Jun-2010
Ref Project
EN 4638:2010 - Aerospace series - Blast media - Brown corundum, without iron

Overview

EN 4638:2010 - Aerospace series - Blast media - Brown corundum, without iron - is a European standard that specifies the required characteristics of iron‑free brown corundum used as blast media for aerospace applications. The standard defines chemical composition, physical properties, grain shape and hardness, and the grain‑size distributions for a range of designated grit sizes (designations F12 → F100). It is intended to ensure consistent, contamination‑controlled abrasive media for surface preparation and reconditioning in the aerospace industry.

Key topics and technical requirements

  • Chemical composition

    • Alumina (Al2O3) ≥ 94%
    • Titanium oxide (TiO2) ≥ 2.5%
    • Iron oxide (Fe2O3) < 0.2% (specified to ensure “without iron” characteristics)
    • Free silica < 1.5%

  • Physical properties

    • Grain shape: angular and massive grains
    • Hardness: typical Knoop ≈ 2 100 kg/mm2 (Mohs ≈ 9)
    • True density (pyknometer): ≥ 3 940 kg/m3

  • Grain size / designations

    • Multiple product grades (F12, F14, F16 … F100) with defined grain size ranges (examples: F12 = 1.20–2.80 mm, F40 = 300–710 µm, F100 = 80–210 µm)
    • Grain‑size distribution and sieve residue limits are given per ISO 565 and determined according to ISO 8486‑1.
    • Sampling and splitting methods for particle distribution determination are specified in Annex B (Tyler‑type) and Annex C (Stack Splitting).

  • Normative references

    • ISO 565 (test sieves)
    • ISO 8486‑1 (grain size distribution for bonded abrasives)

Applications and who uses this standard

  • Primary use: surface preparation and surface reconditioning of aerospace structures and components.
  • Typical users: aerospace coating engineers, MRO (maintenance, repair & overhaul) facilities, blast media manufacturers and suppliers, procurement/specification teams, quality/control laboratories, and design authorities requiring iron‑free abrasive media to avoid contamination and staining of sensitive alloys.
  • Practical value: ensures traceable, repeatable blast media quality for consistent surface cleanliness, adhesion preparation and avoidance of iron‑related corrosion risks on aluminium and composite interfaces.

Related standards

  • ISO 565 - Test sieves (nominal openings)
  • ISO 8486‑1 - Bonded abrasives - determination and designation of grain size distribution (macrogrits F4–F220)

Using EN 4638:2010 helps procurement and quality teams specify and verify brown corundum blast media that meet aerospace cleanliness, performance and contamination control requirements. Keywords: EN 4638:2010, brown corundum, blast media, iron‑free, aerospace, alumina, grain size, ISO 8486-1, surface preparation.

Frequently Asked Questions

SIST EN 4638:2010 is a standard published by the Slovenian Institute for Standardization (SIST). Its full title is "Aerospace series - Blast media - Brown corundum, without iron". This standard covers: This standard specifies the characteristics of brown corundum without iron used as blast media for aerospace applications.

This standard specifies the characteristics of brown corundum without iron used as blast media for aerospace applications.

SIST EN 4638:2010 is classified under the following ICS (International Classification for Standards) categories: 49.040 - Coatings and related processes used in aerospace industry. The ICS classification helps identify the subject area and facilitates finding related standards.

SIST EN 4638:2010 is available in PDF format for immediate download after purchase. The document can be added to your cart and obtained through the secure checkout process. Digital delivery ensures instant access to the complete standard document.

Standards Content (Sample)


2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Aeronavtika - Peskalna sredstva - Rjavi korund, brez železaLuft- und Raumfahrt - Strahlmittel - Normalkorund, braun, eisenfreiSérie aérospatiale - Produit de projetage - Corindon brun sans ferAerospace series - Blast media - Brown corundum, without iron49.040Prevleke in z njimi povezani postopki, ki se uporabljajo v letalski in vesoljski industrijiCoatings and related processes used in aerospace industryICS:Ta slovenski standard je istoveten z:EN 4638:2010SIST EN 4638:2010en01-julij-2010SIST EN 4638:2010SLOVENSKI
STANDARD
EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 4638
April 2010 ICS 49.040 English Version
Aerospace series - Blast media - Brown corundum, without iron Série aérospatiale - Produit de projetage - Corindon brun sans fer
Luft- und Raumfahrt - Strahlmittel - Normalkorund, braun, eisenfrei This European Standard was approved by CEN on 6 February 2010.
CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such national standards may be obtained on application to the CEN Management Centre or to any CEN member.
This European Standard exists in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as the official versions.
CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Croatia, Cyprus, Czech Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2010 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 4638:2010: ESIST EN 4638:2010

Characteristics of corundum .5Annex B (normative)
Tyler type splitting method . 25Annex C (normative)
Stack Splitting Method . 28 SIST EN 4638:2010

Characteristics of corundum DESIGNATION: Brown corundum F 12 Main use: (for information) – Surface preparation
– Surface reconditioning GRAIN SIZE: 1,20 mm to 2,80 mmDESCRIPTION: fused aluminium oxide ASPECT: MATERIAL: Ground corundum COLOUR: Brown
1 ORIGIN:
Artificial 2 CHEMICAL COMPOSITION:
- Alumina ≥ 94 %
- Titanium oxide ≥ 2,5 %
- Iron oxide < 0,2 %
- Free silica < 1,5 % 3 CONTROLLED CHEMICAL COMPONENTS:
None 4 GRAIN SHAPE:
Angular and massive grain 5 HARDNESS (typical values): 2 100 kg/mm2 (Knoop hardness)
9 (Mohs hardness) 6 DENSITY: - True with pyknometer
- ≥ 3 940 kg/m3 7 GRAIN SIZE DISTRIBUTION:
GRAIN SIZE DISTRIBUTION ISO 565
TEST SIEVES - APERTURE 2,80 mm 2 mm 1,40 mm % RESIDUE 0 ≤ 20 ≥ 70 TEST SIEVES - APERTURE 1,20 mm
% REMAINDER ≤ 3
8 METHOD OF DETERMINATION OF GRAIN SIZE DISTRIBUTION: according to ISO 8486-1 (for sampling methods, see Annexes B and C of this standard). SIST EN 4638:2010

– Surface reconditioning GRAIN SIZE: 1 mm to 2,40 mm DESCRIPTION: fused aluminium oxide ASPECT: MATERIAL: Ground corundum COLOUR: Brown
1 ORIGIN:
Artificial 2 CHEMICAL COMPOSITION:
- Alumina ≥ 94 %
- Titanium oxide ≥ 2,5 %
- Iron oxide < 0,2 %
- Free silica < 1,5 % 3 CONTROLLED CHEMICAL COMPONENTS:
None 4 GRAIN SHAPE:
Angular and massive grain 5 HARDNESS (typical values): 2 100 kg/mm2 (Knoop hardness)
9 (Mohs hardness) 6 DENSITY: - True with pyknometer
- ≥ 3 940 kg/m3 7 GRAIN SIZE DISTRIBUTION:
GRAIN SIZE DISTRIBUTION ISO 565
TEST SIEVES - APERTURE 2,40 mm 1,70 mm 1,20 mm % RESIDUE 0 ≤ 20 ≥ 70 TEST SIEVES - APERTURE 1 mm
% REMAINDER ≤ 3
8 METHOD OF DETERMINATION OF GRAIN SIZE DISTRIBUTION: according to ISO 8486-1 (for sampling methods, see Annexes B and C of this standard). 9 SPECIAL INSTRUCTIONS: None. SIST EN 4638:2010

DESIGNATION: Brown corundum F 16 Main use: (for information) – Surface preparation
– Surface reconditioning GRAIN SIZE: 850 µm to 2 mm DESCRIPTION: fused aluminium oxide ASPECT: MATERIAL: Ground corundum COLOUR: Brown
1 ORIGIN:
Artificial 2 CHEMICAL COMPOSITION:
- Alumina ≥ 94 %
- Titanium oxide ≥ 2,5 %
- Iron oxide < 0,2 %
- Free silica < 1,5 % 3 CONTROLLED CHEMICAL COMPONENTS:
None 4 GRAIN SHAPE:
Angular and massive grain 5 HARDNESS (typical values): 2 100 kg/mm2 (Knoop hardness)
9 (Mohs hardness) 6 DENSITY: - True with pyknometer
- ≥ 3 940 kg/m3 7 GRAIN SIZE DISTRIBUTION:
GRAIN SIZE DISTRIBUTION ISO 565
TEST SIEVES - APERTURE 2 mm 1,40 mm 1 mm % RESIDUE 0 ≤ 20 ≥ 70 TEST SIEVES - APERTURE 850 µm
% REMAINDER ≤ 3
8 METHOD OF DETERMINATION OF GRAIN SIZE DISTRIBUTION: according to ISO 8486-1 (for sampling methods, see Annexes B and C of this standard). 9 SPECIAL INSTRUCTIONS: None. SIST EN 4638:2010

DESIGNATION: Brown corundum F 20 Main use: (for information) – Surface preparation
– Surface reconditioning GRAIN SIZE: 710 µm to 1,70 mm DESCRIPTION: fused aluminium oxide ASPECT: MATERIAL: Ground corundum COLOUR: Brown
1 ORIGIN:
Artificial 2 CHEMICAL COMPOSITION:
- Alumina ≥ 94 %
- Titanium oxide ≥ 2,5 %
- Iron oxide < 0,2 %
- Free silica < 1,5 % 3 CONTROLLED CHEMICAL COMPONENTS:
None 4 GRAIN SHAPE:
Angular and massive grain 5 HARDNESS (typical values): 2 100 kg/mm2 (Knoop hardness)
9 (Mohs hardness) 6 DENSITY: - True with pyknometer
- ≥ 3 940 kg/m3 7 GRAIN SIZE DISTRIBUTION:
GRAIN SIZE DISTRIBUTION ISO 565
TEST SIEVES - APERTURE 1,70 mm 1,18 mm 850 µm % RESIDUE 0 ≤ 20 ≥ 70 TEST SIEVES - APERTURE 710 µm
% REMAINDER ≤ 3
8 METHOD OF DETERMINATION OF GRAIN SIZE DISTRIBUTION: according to ISO 8486-1 (for sampling methods, see Annexes B and C of this standard). 9 SPECIAL INSTRUCTIONS: None. SIST EN 4638:2010

DESIGNATION: Brown corundum F 22 Main use: (for information) – Surface preparation
– Surface reconditioning GRAIN SIZE: 600 µm to 1,40 mm DESCRIPTION: fused aluminium oxide ASPECT: MATERIAL: Ground corundum COLOUR: Brown
1 ORIGIN:
Artificial 2 CHEMICAL COMPOSITION:
- Alumina ≥ 94 %
- Titanium oxide ≥ 2,5 %
- Iron oxide < 0,2 %
- Free silica < 1,5 % 3 CONTROLLED CHEMICAL COMPONENTS:
None 4 GRAIN SHAPE:
Angular and massive grain 5 HARDNESS (typical values): 2 100 kg/mm2 (Knoop hardness)
9 (Mohs hardness) 6 DENSITY: - True with pyknometer
- ≥ 3 940 kg/m3 7 GRAIN SIZE DISTRIBUTION:
GRAIN SIZE DISTRIBUTION ISO 565
TEST SIEVES - APERTURE 1,40 mm 1 mm 710 µm % RESIDUE 0 ≤ 20 ≥ 70 TEST SIEVES - APERTURE 600 µm
% REMAINDER ≤ 3
8 METHOD OF DETERMINATION OF GRAIN SIZE DISTRIBUTION: according to ISO 8486-1 (for sampling methods, see Annexes B and C of this standard). 9 SPECIAL INSTRUCTIONS: None. SIST EN 4638:2010

DESIGNATION: Brown Corundum F 24 Main use: (for information) – Surface preparation
– Surface reconditioning GRAIN SIZE: 500 µm to 1,18 mm DESCRIPTION: fused aluminium oxide ASPECT: MATERIAL: Ground corundum COLOUR: Brown
1 ORIGIN:
Artificial 2 CHEMICAL COMPOSITION:
- Alumina ≥ 94 %
- Titanium oxide ≥ 2,5 %
- Iron oxide < 0,2 %
- Free silica < 1,5 % 3 CONTROLLED CHEMICAL COMPONENTS:
None 4 GRAIN SHAPE:
Angular and massive grain 5 HARDNESS (typical values): 2 100 kg/mm2 (Knoop hardness)
9 (Mohs hardness) 6 DENSITY: - True with pyknometer
- ≥ 3 940 kg/m3 7 GRAIN SIZE DISTRIBUTION:
GRAIN SIZE DISTRIBUTION ISO 565 TEST SIEVES - APERTURE 1,18 mm 850 µm 600 µm % RESIDUE 0 ≤ 25 ≥ 65 TEST SIEVES - APERTURE 500 µm
% REMAINDER ≤ 3
8 METHOD OF DETERMINATION OF GRAIN SIZE DISTRIBUTION: according to ISO 8486-1 (for sampling methods, see Annexes B and C of this standard). 9 SPECIAL INSTRUCTIONS: None. SIST EN 4638:2010

DESIGNATION: Brown corundum F 30 Main use: (for information) – Surface preparation
– Surface reconditioning GRAIN SIZE: 430 µm to 1 mm DESCRIPTION: fused aluminium oxide ASPECT: MATERIAL: Ground corundum COLOUR: Brown
1 ORIGIN:
Artificial 2 CHEMICAL COMPOSITION:
- Alumina ≥ 94 %
- Titanium oxide ≥ 2,5 %
- Iron oxide < 0,2 %
- Free silica < 1,5 % 3 CONTROLLED CHEMICAL COMPONENTS:
None 4 GRAIN SHAPE:
Angular and massive grain 5 HARDNESS (typical values): 2 100 kg/mm2 (Knoop hardness)
9 (Mohs hardness) 6 DENSITY: - True with pyknometer
- ≥ 3 940 kg/m3 7 GRAIN SIZE DISTRIBUTION:
GRAIN SIZE DISTRIBUTION ISO 565
TEST SIEVES - APERTURE 1 mm 710 µm 500 µm % RESIDUE 0 ≤ 25 ≥ 65 TEST SIEVES - APERTURE 425 µm
% REMAINDER ≤ 3
8 METHOD OF DETERMINATION OF GRAIN SIZE DISTRIBUTION: according to ISO 8486-1 (for sampling methods, see Annexes B and C of this standard). 9 SPECIAL INSTRUCTIONS: None. SIST EN 4638:2010

DESIGNATION: Brown corundum F 36 Main use: (for information) – Surface preparation
– Surface reconditioning GRAIN SIZE: 360 µm to 850 µm DESCRIPTION: fused aluminium oxide ASPECT: MATERIAL: Ground corundum COLOUR: Brown
1 ORIGIN:
Artificial 2 CHEMICAL COMPOSITION:
- Alumina ≥ 94 %
- Titanium oxide ≥ 2,5 %
- Iron oxide < 0,2 %
- Free silica < 1,5 % 3 CONTROLLED CHEMICAL COMPONENTS:
None 4 GRAIN SHAPE:
Angular and massive grain 5 HARDNESS (typical values): 2 100 kg/mm2 (Knoop hardness)
9 (Mohs hardness) 6 DENSITY: - True with pyknometer
- ≥ 3 940 kg/m3 7 GRAIN SIZE DISTRIBUTION:
GRAIN SIZE DISTRIBUTION ISO 565 (µm) TEST SIEVES - APERTURE 850 600 425 % RESIDUE 0 ≤ 25 ≥ 65 TEST SIEVES - APERTURE 35
...

Questions, Comments and Discussion

Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.

Loading comments...