PSA GROUP

Metallic materials B53 3108

WELDABLE STEEL FLAT PRODUCTS
EXTRA-MILD HOT ROLLED STEELS
FOR COLD STAMPING

Page 1/5
This norm PARTIALLY REPLACES norms B53 3110
This is a translation, the French original shall be used in all cases of litigation Date of translation: 14/02/2017

This standard is published by the PSA Standards Department (DQI/DAPF/RHN)

For any question, contact us at the next address: normespsa@mpsa.com.
This standard is available in the Intranet NORMES and on the B2B gate.
In the event of litigation, only the French version of this standard is taken.

WARNING

This PSA norm has been translated by RHN / NCF into English using the automatic translation software
Systran (approved by PSA).
The quality of this translation has been technically validated by the PSA Technical Discipline proprietor of
this norm.
This document is available on-line in "NORMES" Intranet (normes.inetpsa.com) as well as on
the B2B portal (suppliers and industrial partners).

Drafted by : Checked by : Approved by :

Pascal COLIN Julien FERAILLE

See list of the Participants
DTI/DITV/PMXP/CEB/V2M DTI/DITV/PMXP/CEB/V2M

Date Signature Date Signature Date Signature

16/06/2009 - 16/06/2009 - 16/06/2009 -

OR : 01/11/1991 D : 17/02/2010 INTERNAL USE (C1)

 PSA GROUP
STEEL FLAT PRODUCTS WELDABLE EXTRA MILD B53 3108 2/5

RECORDS

Index Date Nature of the amendments

OR 01/11/1991 CREATION OF THE NORM

A 01/02/1992 EXAMPLE OF THE § 4.1. : ADDITION OF POSSIBILITY LAF (ROLLS COLD).

CREATION OF DERIVED NUANCES FOR GALVANIZATION WITH

B 01/02/1993
HARDENING.

C 21/10/1996 RECOVERY UNDER IDEM

CONFIRMATION OF THE NORM AND NORMS QUOTED FOLLOWING

D 17/02/2010 INVESTIGATION VALIDITY NEAR TRADE DTI/DITV/PMXP/CEB/V2M IN MAY
2009.

PARTICIPANTS
The following people took part in the drafting and the checking of this standard:
DTI/DITV/RHN/NCF Jacques HIVERNIAU

CONTENTS

1. OBJECT AND SCOPE OF APPLICATION 3

2. DOCUMENTS 3
2.1. REFERENCE DOCUMENTS 3
2.1.1. Norms 3
2.1.2. Regulations 3
2.1.3. Other documents 3
2.2. APPLICABLE DOCUMENTS 3
2.2.1. Norms 3
2.2.2. Regulations 3
2.2.3. Other documents 4
2.3. EXPRESSIONS ON DOCUMENTS 4
2.3.1. Indifferent matter quality 4
2.3.2. Complementary specifications 4
3. TERMINOLOGY AND DEFINITION 4
3.1. DEFINITIONS 4
3.2. INITIALS 4
4. CHEMICAL COMPOSITION 4
5. CHARACTERISTICS OF THE PRODUCTS TO THE DELIVERY CONDITION 4
5.1. GENERAL INFORMATION 4
5.2. CHEMICAL COMPOSITION (%) 5
5.3. MICROGRAPHIC CHARACTERISTICS 5
5.3.1. Inclusion cleanliness 5
5.3.2. Structure 5
5.4. MECHANICAL CHARACTERISTICS 5
6. DERIVED NUANCES 5

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STEEL FLAT PRODUCTS WELDABLE EXTRA MILD B53 3108 3/5

1.OBJECT AND SCOPE OF APPLICATION

The present standard defines the regulations specific to the flat non allied ingot-iron products, hot rolled-iron
products (LAC) for stamping, naked or covered before or after working and with thickness higher or equal to 1.50
mm delivered in the form of:
 sheets in sheets,
 broad band and broad band split in reels,
 bars.
It must be accompanied by the documents defining the general regulations of the flat products:
 B53 3020 Designation - Symbolization.
 B53 3050 General regulations of supplies.
 B53 3055 Metallurgical regulations - Tests.
 B53 3070 Technical specifications particular LAF-LAC.
 B53 3072 Dimensional regulations LAF-LAC.

2.DOCUMENTS
2.1.REFERENCE DOCUMENTS
2.1.1.NORMS
Not applicable

2.1.2.REGULATIONS
Not applicable

2.1.3.OTHER DOCUMENTS
Not applicable
2.2.APPLICABLE DOCUMENTS
2.2.1.NORMS
B53 3020 STEEL FLAT PRODUCTS DESIGNATIONS - SYMBOLS
B53 3050 STEEL AND ALUMINIUM FLAT PRODUCTS - GENERAL SPECIFICATIONS FOR
SUPPLY
B53 3055 STEEL OR ALUMINIUM FLAT PRODUCTS - HOT OR COLD ROLLED
METALLURGICAL REQUIREMENTS - TESTS
B53 3070 FLAT PRODUCTS - HOT OR COLD ROLLED - SPECIFIC TECHNICAL
REQUIREMENTS
B53 3072 STEEL FLAT PRODUCTS - HOT OR COLD ROLLED - DIMENSIONAL
SPECIFICATIONS
NF A04-106 IRON AND STEEL PRODUCTS - METHODS OF DETERMINATION OF THE CONTENT
OF NONMETAL INCLUSIONS OF THE SHEAR STEELS - PART II: MICROGRAPHIC
METHOD USING IMAGE-TYPES.
NF EN ISO 643 STEELS - MICROGRAPHIC DETERMINATION OF THE APPARENT GRAIN SIZE

2.2.2.REGULATIONS
Not applicable

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STEEL FLAT PRODUCTS WELDABLE EXTRA MILD B53 3108 4/5

2.2.3.OTHER DOCUMENTS
Not applicable
2.3.EXPRESSIONS ON DOCUMENTS

2.3.1.INDIFFERENT MATTER QUALITY

(general case)
The matter is defined in the following form:
 Sheet.
 Reference of this norm.
 Nominal thickness delivered in mm (*).
Example:
 Sheet (norm B53 3108 or B53 3106) E = * mm.
The choice of the manufacturing process (LAC or LAF) and of the nuance is left with the services of the Methods;
that of the aspect on the initiative of the services Studies, Quality and Methods.
2.3.2.COMPLEMENTARY SPECIFICATIONS
If a particular characteristic is necessary (e.g.: elastic limit) one carries the desired nuance.
Example:
 Sheet 3C (norm B53 3108) E = * mm.
Note: The manufacturing process of the sheets LAC involves significant variations thickness as well as defects of
surface being able to harm the resistance to fatigue of the parts. It is necessary to hold of it account at the time of
the choice of the matter.

3.TERMINOLOGY AND DEFINITION

A dictionary (glossary) of the main terms and their definitions used within the activities of the Department "Amont
Technico-Industriel" can be consulted in-house via the glossary Nectar (http://nectar.inetpsa.com). This glossary is
constantly up-dated.

3.1.DEFINITIONS
For the needs for this norm, the following terms are defined:
Not applicable
3.2.INITIALS
For the needs for this standard, the following initials are defined:
Not applicable

4.CHEMICAL COMPOSITION
See § 5.2

5.CHARACTERISTICS OF THE PRODUCTS TO THE DELIVERY CONDITION

5.1.GENERAL INFORMATION
The products must be free from harmful defects to their use.
They must be suited to stamping, welding, joining, and their setting in painting.
These products are auto--annealings and pickled.
A particular roughness can be required.

OR : 01/11/1991 D : 17/02/2010 INTERNAL USE (C1)

 PSA GROUP
STEEL FLAT PRODUCTS WELDABLE EXTRA MILD B53 3108 5/5

5.2.CHEMICAL COMPOSITION (%)

MODERAT DESIGNATION Ceq (1) C Mn If P S Al

E SHEET max. max. max. max. max. max. min.
1C 1C 0.18 0.10 0.50 0.04 0.040 0.035 0.020
3C 3C 0.14 0.08 0.40 0.04 0.025 0.025 0.020

Mn  Si
(1) Carbone Equivalent Ceq  C  . Valeurs impé ratives.
6
Note: The addition of micro alloy elements is possible after agreement.

5.3.MICROGRAPHIC CHARACTERISTICS
5.3.1.INCLUSION CLEANLINESS
Metal must be clean and without blisters. The observation field charged in nondeformable inclusions should not
exceed for each type of inclusion, the figure “2” of scale JERNKONTORET in accordance with norm NF A04-106.
5.3.2.STRUCTURE
The structure must be nonribboned but with homogeneous grains in their form and their size.
The allowed sizes of grains, measured according to norm NF IN ISO 643 appear in table § 5.4.
A maximum variation of size of grain of 2 is tolerated between the surface and the core of sheet, within the limit
requested from the § 5.4.
5.4.MECHANICAL CHARACTERISTICS
They must be guaranteed for 3 months starting from the date of provision.
The tensile specimens are taken in the direction through. The conditions of tests are defined in the norm B53 3055.
MODERATE RP 0.2 Rm (MPa) A % min. HRB HB GRAIN
(MPa) Direction max. max. AFNOR
Direction through (1) (1) min.
through
ISO 20 X 80 
e<3 LO  5,65 SO
e3
1C (2) 200 330 25 28 70 125 4
330 440
3C 220 320 31 37 61 108 6
280 370
(1) As an indication.
(2) The nuance 1C is reserved for the uses of folding, cutting flat and driving for which the geometrical tolerances
allow it.

6.DERIVED NUANCES
1C.R  Derived nuances for galvanization with soaked parts after working.

3C.R  Differ from the basic chemical composition only by:

Differ from the basic chemical composition only by:

  0,03 %
and
 If + 2,5 P  0,09 %
Note: The choice of these derived nuances implies in all the cases of the functional checks and requires the
agreement of the Services Studies concerned.

OR : 01/11/1991 D : 17/02/2010 INTERNAL USE (C1)