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TL011


Cast Iron – 25
Material Requirements Konzernnorm Descriptors: cast iron, brake drum, brake disc, brake

TL 011

Preface TL 011 became invalid with the 06/01 issue. The TL was reissued in slightly revised form after the Group reported a need for this document. Changes The following changes have been made as compared to TL 011: 1999-12: Standard restructured VW 011 55 and VW 911 01 added Referenced standards updated Previous issues 1969-07; 1970-01; 1972-04; 1976-01; 1976-11; 1985-07; 1989-02; 1999-12 1 Scope

This TL standard specifies the material requirements for cast iron for brake drums and brake discs. 2 Designation

Cast iron per TL 011 3 3.1 Requirements Basic specifications

Approval of first supply and changes according to VW 011 55. Avoidance of hazardous substances acc. to VW 911 01. 3.2 Grade

Similar to EN-GJL-250 according to DIN EN 1561.

Form FE 41 - 12.00

Page 1 of 3
Fachverantwortung/Responsibility K-QS-32 Wendt Tel:-38956 Normung/Standards (EZTN, 1733) Frau Hager-Sü? Tel: +49-5361-9-49035 Sobanski

Vertraulich. Alle Rechte vorbehalten. Weitergabe oder Vervielf?ltigung ohne vorherige schriftl. Zustimmung einer Normenabteilung des Volkswagen Konzerns nicht gestattet. Vertragspartner erhalten die Norm nur über die zust?ndige Beschaffungsabteilung. Confidential. All rights reserved. No part of this document may be transmitted or reproduced without the prior written permission of a Standards Department of the Volkswagen Group. Parties to a contract can only obtain this standard via the responsible procurement department.

? VOLKSWAGEN AG

Norm vor Anwendung auf Aktualit?t prüfen / Check standard for current issue prior to usage.

Klass.-Nr. 51 61 1
The English translation is believed to be accurate. In case of discrepancies the German version shall govern.

December 2001

Page 2 TL 011: 2001-12

3.3

Chemical composition in weight percent

See table 1. Table 1 C Si Mn P S Cr ≤ 0.3 Ni Cu Ti ≤ 0.1 Sn 1) Sc 2) =
Ctotal 4 .3 ?1 / 3 ( Si + P )

2.8 to 1.8 to 0.3 to ≤ 0.25 ≤ 0.1 3.4 2.8 1.0

≤ 0.25 ≤ 0.8

≤ 0.07 ≤ 0.98

1) Addition of Sn only permissible to the extent required for isothermal annealing. 2) The permissible degree of saturation can be restricted by the responsible test laboratory. 3.4 3.4.1 Microstructure Matrix

Lamellar pearlite; ferrite content in the core < 10%, to 0.5 mm beneath the casting surface < 30%. 3.4.2
-

Graphite structure according to DIN EN ISO 945

Shape: Ι Location and size: A4 to 7 (isolated A3 and D7 to 8 still permissible) Physical properties

3.5

See table 2 and section 4.1. Table 2 No. 1 2 3 3.1 3.2 3.3 4 4.1 Property Hardness Tensile strength Wedge pressure resistance Wedge angle Edge radius Test cross section Notes on testing Physical properties Requirement (220 ± 25) HB 5/750 Rm ≥ 250 N/mm2 Rk ≥ 175 N/mm2 (90 ± 1)° ≤ 0.2 mm 6 x 20 mm2

The properties must be ensured in the casting in its not yet installed condition. Test location according to drawing. The wedge pressure resistance is binding as the definitive strength test – unless otherwise agreed. The wedge pressure resistance can be converted to tensile strength using the formula: Rm = 1.86 Rk – 64

Page 3 TL 011: 2001-12

5

Referenced standards Vehicle Supply Parts – General, Approval of First Supply and Changes Environmental Standard for Vehicles, Vehicle Parts, Materials, Fuels; Avoidance of Hazardous Substances Foundry; Cast Iron with Lamellar Graphite Cast Iron – Designation of Microstructure of Graphite

VW 011 55 VW 911 01 DIN EN 1561 DIN EN ISO 945



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