WÜRTH Industrie Service

INNOVATIVEsurfAcE sysTEms

With maximum corrosion resistances

Preface 2

Würth Surface Systems 3

Construction Notes 4

Performance Characteristics 5-6

Electrolytic Metal Coatings 7-8 Non-Electrolytic Metal Coatings 9

Compatibility Table 10

Table of Contents: Page

Liability:All information in this brochure has been carefully researched and compiled. Nevertheless, errors can occur, details can be translated incorrectly, information may be missing or the information provided may have changed in the meantime. Therefore we do not assume any guarantee or liability for the correctness, completeness, topicality or quality of the information provided. We do not accept any liability for damages, especially direct or indirect as well as material or immaterial arising from the use or misuse of information given in this brochure unless not based on intent or gross negligence of our part.

Within the Würth group Würth Industrie Service GmbH &

Co. KG is responsible for delivering industrial customers. In

1999 the company was founded as an independent com-

pany and since that date it is operating from its location at

the Industriepark Würth in Bad Mergentheim/Germany.

The wide range of C-parts adapted to the needs of spe-

cifi c target groups and the unique supply concept make

Würth Industrie Service be your competent partner for

C-parts. The product range of Würth Industrie Service is

focused on industrial requirements for production needs,

small parts and assembly material for the construction of

plants, machines and vehicles as well as the maintenance

equipment.

Würth Industrie Service provides market support and con-

sequently analyses the current needs and the future requi-

rements of all customers.

The coated fasteners in stock decisively expand our stan-

dard product range and completely meet the requirements

of several company standards in the fi eld of the automotive

industry as well as the machinery and plant engineering.

In addition to the products Würth Industrie Service provi-

des competent and individual technical customer service.

Learn more about Würth Surface Systems in this brochure!

We look forward to a cooperative partnership and thank

you for your confi dence.

Dr. Uwe Hasselmann,

Head of Technical Department

Dear customer of Würth Industrie Service!

INNOVATIVE surfAcE sysTEms 2

3 INNOVATIVE surfAcE sysTEms

After thorough market analyses and several standardisa-

tion processes the surface systems have been developed

for a wide field of applications. We succeeded in reducing

the number of systems on only five. You find an overview

of the systems on pages five and six, a detailed descrip-

tion of the individual surfaces from pages seven to nine.

The requirements to be met are fulfilled by audited

suppliers and are regularly checked by our quality as-

surance laboratory. Würth Industrie Service reserves

the right to choose the type of coating depending on

the licensor and the coating company. The surface sys-

tems we offer clearly exceed the requirements on cor-

rosion protection according to the different standards

(DIN EN ISO 4042, DIN EN ISO 10683 and

DIN 50979).

Würth Surface Systems

Chromium(VI)-free corrosion protection coatings are state of the art in coating technology

Choosing the new Würth Surface Systems you have the following advantages:

• Repeatable preload forces due to defined coefficients of friction for all coating systems

• Conforms to the latest environmental laws:

- EU Directive 2011/65/EU „RoHS“

- EU Directive 2012/19/EU „WEEE“

- EU Directive 2000/53/EU on end-of-life vehicles

- VDA list (GADSL)

- REACh Regulation EG 1907/2006 „REACh“

• Maximum corrosion resistances

• Uniform surface designations

• Maximum quality standard

• Cost savings due to a reduced number of different parts

INNOVATIVE surfAcEsysTEms 4

Construction Notes

Which coating type for which application?

Searching the optimum corrosion protection there are a large number of factors to observe.

Factors are:

- the environment

- the respective component material

- the design of the part

- as well as legal and normative requirements.

Our product and application service would be happy to help you find the optimum coating for your specific application.

High-strength partsDisadvantages of electroplated coatings on parts with property class 10.9 or more (zinc, zinc-nickel alloys) can be com-

pensated by zinc flake coatings. There is an increased risk of hydrogen embrittlement if high-strength or case-hardened

parts have got an electroplated surface coating. This applies to fasteners having a core or surface hardness higher than

320 HV or a tensile strength of more than 1,000 MPa. Any further treatment of the parts (e.g. heat treatment) cannot

completely exclude hydrogen embrittlement according to DIN EN ISO 4042.

Trueness to gauge size of zinc flake coatings Würth Surface Systems with zinc flake coating are only availble for thread diameters ≥ M6. The reason for this is that

thread pitches smaller than 1 mm are not completely true to gauge size. Therefore and in accordance with the latest

technical standards zinc flake coatings can only be used without restrictions for thread components ≥ M6. In cooperation

with licensors and coating engineers we are currently developing reliable solutions for dimensions ≤ M5. Nevertheless,

restrictions on the lifetime of corrosion protection have to be accepted for some cases.

Zinc flake coatings on products with internal drivesIf you use zinc flake coatings for products with internal drives smaller than M6, undesirable material accumulation may

occur. In this case an optimum load transmission cannot be ensured.

Designation Signification Type of surface protectionCorrosion protection property

and application example

Limit values for the coeffici-ent of friction (μ) according to DIN EN ISO

16047 1)

Nominal thread size

Reference coa-ting thickness

(μm) 2)

Test according to

DIN EN ISO9227- NSS(h) 3)

Maximum opeating tem-

perature 4)

Property class

ZSML ZincSilverMediumLubricated

• Zinc plating• Iridescent passivated and sealed• Colour: silver• With lubricant for torque tension adjustment

• „Medium“ corrosion protection• For parts subject to moderate corrosion

0.09 – 0.14

120 C° ≤ 10.9

ZNSHL Zinc NickelSilverHighLubricated

• Zinc-nickel alloy plating• Iridescent passivated and sealed• Colour: silver• With lubricant for torque tension adjustment

• „High“ corrosion protection• For exposed installation positions 120 C° ≤ 10.9

ZNBHL Zinc NickelBlackHighLubricated

• Zinc-nickel alloy plating• Iridescent passivated and sealed• Colour: black• With lubricant for torque tension adjustment

• „High“ corrosion protection• For exposed installation positions and visually attractive parts

120 C° ≤ 10.9

ZFSHL Zinc FlakeSilverHighLubricated

• Zinc flake coating• With organic/anorganic top coat• Colour: silver• With lubricant for torque tension adjustment

• „High“ corrosion protection• For exposed installation positions and/or high-strength fasteners

200 C° ≤ 12.9

ZFBHL Zinc FlakeBlackHighLubricated

• Zinc flake coating• with organic/anorganic top coat• Colour: black• With lubricant for torque tension adjustment

• „High“ corrosion protection• For exposed installation positions and/or high-strength fasteners

200 C° ≤ 12.9

5 INNOVATIVE surfAcE sysTEms

Performance Characteristics

Designation Signification Type of surface protectionCorrosion protection property

and application example

Limit values for the coeffici-ent of friction (μ) according to DIN EN ISO

16047 1)

Nominal thread size

Reference coa-ting thickness

(μm) 2)

Test according to

DIN EN ISO9227- NSS(h) 3)

Maximum opeating tem-

perature 4)

Property class

ZSML ZincSilverMediumLubricated

• Zinc plating• Iridescent passivated and sealed• Colour: silver• With lubricant for torque tension adjustment

• „Medium“ corrosion protection• For parts subject to moderate corrosion

0.09 – 0.14

120 C° ≤ 10.9

ZNSHL Zinc NickelSilverHighLubricated

• Zinc-nickel alloy plating• Iridescent passivated and sealed• Colour: silver• With lubricant for torque tension adjustment

• „High“ corrosion protection• For exposed installation positions 120 C° ≤ 10.9

ZNBHL Zinc NickelBlackHighLubricated

• Zinc-nickel alloy plating• Iridescent passivated and sealed• Colour: black• With lubricant for torque tension adjustment

• „High“ corrosion protection• For exposed installation positions and visually attractive parts

120 C° ≤ 10.9

ZFSHL Zinc FlakeSilverHighLubricated

• Zinc flake coating• With organic/anorganic top coat• Colour: silver• With lubricant for torque tension adjustment

• „High“ corrosion protection• For exposed installation positions and/or high-strength fasteners

200 C° ≤ 12.9

ZFBHL Zinc FlakeBlackHighLubricated

• Zinc flake coating• with organic/anorganic top coat• Colour: black• With lubricant for torque tension adjustment

• „High“ corrosion protection• For exposed installation positions and/or high-strength fasteners

200 C° ≤ 12.9

1) The friction value range is adjusted by additionally applied lubricants or lubricants integrated in sealing systems2) Reference coating thicknesses: The result of the corrosion test is decisive for the assumed value3) WR = Coating corrosion (white rust), RR = Base metal corrosion (red rust)4) Up to this temperature the systems haven proven successful in practical applications5) To limit the testing effort the requirements are restricted to 720 h INNOVATIVE surfAcE sysTEms 6

≥ M2

≥ M2

≥ M2

≥ M4

≥ M4

≥ M4

≥ M10

≥ M10

≥ M10

≥ M6

≥ M6

≥ M10

≥ M10

72 WR120 RR

120 WR360 RR

120 WR360 RR

120 WR192 RR

168 WR600 RR

168 WR480 RR

120 WR264 RR

168 WR720 RR5)

168 WR720 RR5)

480 RR

480 RR

720 RR

720 RR

min. 3

min. 3

min. 3

min. 5

min. 5

min. 5

min. 8

min. 8

min. 8

min. 5

min. 5

min. 8

min. 8

7 INNOVATIVE surfAcE sysTEms

Electrolytic Metal Coatings

Zinc Plating ZSML

Field of application:• Suitable for applications of low or medium corrosion

• All conventional electroplated coatings can be replaced by this superior surface quality

Coating composition:• Zinc

• Passivation (Chromium III)

• Sealing (Top coat)

Coating properties:• Functional and decorative

• High ductility

• High cathodic corrosion protection even for coating thicknesses of 3 μm

• Thermal resistance up to 120 °C

• Uniform distribution of layers

• General coating is a „thick film passivation“

INNOVATIVE surfAcE sysTEms 8

Electrolytic Metal Coatings

Zinc Nickel PlatingZNSHL, ZNBHL

Field of application:• Suitable for applications of maximum corrosion

• All conventional electroplated coatings can be replaced by this superior surface quality

Coating composition:• 85 - 90 % Zinc

• 10 - 15 % Nickel

• Sealing (Top coat)

Coating properties:• Maximum cathodic corrosion protection

• Corrosion resistance up to 720 h against base metal corrosion (red rust)

in salt spray testing according to DIN EN ISO 9227

• Thermal resistance up to 120 °C

• Uniform distribution of layers

Non-Electrolytic Metal Coatings

Zinc Flake CoatingsZFSHL, ZFBHL

Field of application:• Suitable for applications of maximum corrosion

• Suitable for high-strength components (property classes 10.9 and more)

Coating composition:• Consisting of base coat and top coat

• The base coat (anorganic) consists of zinc and aluminium flakes

• The top coat consists of organic or anorganic layers

Coating properties:• Corrosion resistance up to 720 h against base metal corrosion (red rust)

in salt spray testing according to DIN EN ISO 9227

• No hydrogen during the coating process

• Thermal resistance up to 200 °C

• Increased protection against contact corrosion

• Sufficient electrical conductivity for most applications

• Sufficient ductility for most applications

• Mostly resistant against vehicle operating materials

9 INNOVATIVE surfAcE sysTEms

Compatibility Table

INNOVATIVE surfAcE sysTEms 10

The following table shows surface standards of different companies which are comparable to Würth Surface Systems.

Depending on the nominal thread diameter there may be slightly different corrosion resistances in the listed company

standards.

Designation VDA VW Daimler Porsche Bosch BMW

VDA 235-104.20

Ofl-c343Ofl-c641 DBL 8451.16

GS 90010ZNT

VDA 235-104.A26-27 Ofl-r645

GS 90010ZNNID SI

VDA 235-104.30 Ofl-r677 DBL 9441.55

GS 90010ZNNID SW

VDA 235-104.42

TL 245Ofl-t647

DBL 9440.40DBL 8440.22DBL 8440.40

N67F 82723 + 24

N67F 827 44

GS 90010ZNS 2ZNS 3

VDA 235-104.50

PN1101126 c 1

N67F 82733 + 34

N 600 00.050/ZNS SW

Designation FIAT ContinentalKnorr

Bremse TRW ZF

9.57513RIV/EC 5 PLRIV/EC 8 PL

ATE N 106 61 No. 1635No. 1642

N12005, P01 .03.04

TS2-25-60Class J

ZFB 865

9.57513RIV/EC 5 PL NeroRIV/EC 8 PL Nero

ATE N 106 61 No. 1636

ZSML

ZNSHL

ZNBHL

ZFSHL

ZFBHL

ZSML

ZNSHL

ZNBHL

ZFSHL

ZFBHL

INNOVATIVE surfAcE sysTEmsWith maximum corrosion resistances

Printed on environmentally friendly paper.

We reserve the right to make product changes at any time and without prior notice or information, if in our opinion the quality is improved by doing this. Illustrations are examples that may differ from the delivered goods. We reserve the right to make errors and we do not assume any liability for misprints. Our General Terms and Conditions apply.

Responsible for the content:Dr. Uwe Hasselmann/T

Editor:Marius Schmitt/MP

Reproduction, in whole or in parts, only with the approval of Würth Industrie Service GmbH & Co. KG.MW – Y – YK – 2,5’ – 04/14

Würth Industrie Service GmbH & Co. KGIndustriepark Würth, Drillberg D-97980 Bad MergentheimT +49 79 31 91-0F +49 79 31 91-4000produktmarketing@wuerth-industrie.comwww.wuerth-industrie.com

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