EN 10346:2015

• Abstract:

  This European Standard specifies requirements for continuously hot-dip coated products made of low carbon steels for cold forming, of steels for construction, of steels with high proof strength for cold forming and coated with zinc (Z), zinc-iron alloy (ZF), zinc-aluminium alloy (ZA), aluminium-zinc alloy (AZ), aluminium-silicon alloy (AS) or zinc-magnesium alloy (ZM) and for continuously hot-dip coated products made of multiphase steels for cold forming coated with zinc (Z), zinc-iron alloy (ZF), zinc-aluminium alloy (ZA) or zinc-magnesium alloy (ZM) in thicknesses of 0,20 mm ≤ t < 3,0 mm. ; By agreement at the time of enquiry and order, this European Standard is applicable to continuously hot-dip coated flat products of an expanded validity range defined for thicknesses t < 0,20mm or in thicknesses 3,0mm < t < 6,5mm with agreed mechanical properties and test specimens, adhesion of coating and surface condition requirements.; The thickness is the final thickness of the delivered product after coating.; This document applies to strip of all widths and to sheets cut from it (≥ 600 mm width) and cut lengths ; (< 600 mm width).; NOTE 1 Products coated with (pure) aluminium can also be available, but are not covered by this European standard.; NOTE 2 The products covered by this European Standard are used where cold formability, high strength, a defined minimum yield strength and corrosion resistance are the most important factors. Corrosion resistance of the product is proportional to the coating thickness, hence to its mass (see also 7.3.2). The products covered by this European Standard can be used as substrates for organic coated flat products specified in EN 10169 for building and general engineering applications.; NOTE 3 By agreement at the time of enquiry and order, this European standard is applicable to other continuously hot-dip coated hot rolled steel flat products (e.g. in accordance with EN 10149-2).

• Status: Published
• Publication Date: 14-Jul-2015
• Withdrawal Date: 30-Jan-2016
• ICS: 77.140.50 - Flat steel products and semi-products
• Technical Committee: ECISS/TC 109 - Coated and uncoated flat products to be used for cold forming
• Drafting Committee: ECISS/TC 109/WG 1 - Uncoated and coated flat products for cold forming and construction, except tin mill products
• Current Stage: 9092 - Decision on results of review/2YR ENQ - revise - Review Enquiry
• Start Date: 20-Apr-2021
• Completion Date: 23-Sep-2026
• Ref Project: SIST EN 10346:2015 - Continuously hot-dip coated steel flat products - Technical delivery conditions

• Replaces: EN 10346:2009 - Continuously hot-dip coated steel flat products - Technical delivery conditions
• Effective Date: 22-Jul-2015
• Refers: ISO 10275:2007 - Metallic materials — Sheet and strip — Determination of tensile strain hardening exponent
• Effective Date: 25-Aug-2026
• Refers: ISO 10113:2006 - Metallic materials — Sheet and strip — Determination of plastic strain ratio
• Effective Date: 25-Aug-2026
• Refers: EN 10027-1:2016 - Designation systems for steels - Part 1: Steel names
• Effective Date: 28-Jan-2026
• Refers: EN 16603-50-53:2015 - Space engineering - SpaceWire - CCSDS packet transfer protocol
• Effective Date: 28-Jan-2026
• Refers: EN 606:2004 - Bar coding - Transport and handling labels for steel products
• Effective Date: 28-Jan-2026
• Refers: EN 10325:2006 - Steel - Determination of yield strength increase by the effect of heat treatment [Bake-Hardening-Index]
• Effective Date: 28-Jan-2026
• Refers: EN 10143:2006 - Continuously hot-dip coated steel sheet and strip - Tolerances on dimensions and shape
• Effective Date: 28-Jan-2026
• Refers: EN 10021:2006 - General technical delivery conditions for steel products
• Effective Date: 28-Jan-2026
• Refers: EN 10204:2004 - Metallic products - Types of inspection documents
• Effective Date: 28-Jan-2026
• Refers: EN 10020:2000 - Definition and classification of grades of steel
• Effective Date: 28-Jan-2026
• Refers: EN 10079:2007 - Definition of steel products
• Effective Date: 28-Jan-2026
• Refers: EN 10049:2013 - Measurement of roughness average Ra and peak count RPc on metallic flat products
• Effective Date: 28-Jan-2026
• Refers: EN ISO 6892-1:2009 - Metallic materials - Tensile testing - Part 1: Method of test at room temperature (ISO 6892-1:2009)
• Effective Date: 28-Jan-2026
• Refers: EN 10027-2:2015 - Designation systems for steels - Part 2: Numerical system
• Effective Date: 28-Jan-2026

Overview

EN 10346:2015 - "Continuously hot-dip coated steel flat products for cold forming - Technical delivery conditions" (CEN) specifies requirements for continuously hot‑dip coated flat steel products intended for cold forming. It covers low‑carbon steels, steels for construction, high proof‑strength steels and multiphase steels coated with zinc (Z), zinc‑iron (ZF), zinc‑aluminium (ZA), aluminium‑zinc (AZ), aluminium‑silicon (AS) or zinc‑magnesium (ZM). The standard applies primarily to final thicknesses 0.20 mm ≤ t < 3.0 mm (with extensions by agreement), and to strips and sheets (cut lengths or widths as defined).

Key topics and technical requirements

• Scope & classification
  • Defines steel families (low‑carbon, construction, high proof‑strength, multiphase) and applicable coating systems (Z, ZF, ZA, AZ, AS, ZM).
  • Pure aluminium coatings are noted as available but not covered.
• Dimensional limits
  • Thickness is the final thickness after coating; standard covers 0.20–3.0 mm (extensions possible by agreement).
• Coating types & coating mass
  • Specifies coating types, finishes and coating mass requirements. Corrosion resistance is linked to coating mass.
  • Annex A–C provide normative methods for determination of coating mass and alloy layers.
• Mechanical properties
  • Minimum yield/strength and formability requirements for cold forming steels, including rules for multiphase and high‑strength grades.
• Surface quality & finish
  • Requirements for surface appearance, roughness, coating finish and optional surface treatments (passivation, oiling, phosphating, sealing).
• Adhesion, defects & suitability
  • Criteria for adhesion, coil breaks, bends (kinks), stretcher strains, and suitability for further processing.
• Inspection & testing
  • Defines inspection types, sampling, test units and test methods (tensile test, coating mass, surface inspection, etc.).
• Logistics
  • Marking, packing, storage and transportation requirements.

Applications and users

• Typical users:
  • Steel producers and coaters, OEMs, metal forming companies, architects, structural and sheet‑metal engineers, procurement and QA teams.
• Practical applications:
  • Components requiring cold formability plus corrosion protection: building envelopes (roofing, cladding), structural sections, profiles, appliances, automotive inner panels, and substrates for organic coatings (see EN 10169).
• Value:
  • Ensures consistent delivery conditions, measurable corrosion performance (via coating mass), predictable formability and traceable testing for manufacturing and specification.

Related standards

• EN 10169 (organic coated steel for building and general engineering) - EN 10346 products are commonly used as substrates.
• EN 10149‑2 and other hot‑rolled steels may be included by agreement for extended product ranges.

Keywords: EN 10346:2015, hot-dip coated steel, cold forming, zinc coating, coating mass, surface quality, mechanical properties, CEN.

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Kontinuierlich schmelztauchveredelte Flacherzeugnisse aus Stahl - Technische LieferbedingungenProduits plats en acier revêtus en continu par immersion à chaud - Conditions techniques de livraisonContinuously hot-dip coated steel flat products - Technical delivery conditions77.140.50SROL]GHONLFlat steel products and semi-productsICS:Ta slovenski standard je istoveten z:EN 10346:2015SIST EN 10346:2015en,fr,de01-oktober-2015SIST EN 10346:2015SLOVENSKI
STANDARDSIST EN 10346:20091DGRPHãþD

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORM
EN 10346
July 2015 ICS 77.140.50 Supersedes EN 10346:2009English Version
Continuously hot-dip coated steel flat products for cold forming -Technical delivery conditions
Produits plats en acier revêtus en continu par immersion à chaud pour formage à froid - Conditions techniques de livraison
Kontinuierlich schmelztauchveredelte Flacherzeugnisse aus Stahl - Technische Lieferbedingungen This European Standard was approved by CEN on 16 April 2015.
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-CENELEC 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-CENELEC 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, Former Yugoslav Republic of Macedonia, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland, Turkey and United Kingdom.
EUROPEAN COMMITTEE FOR STANDARDIZATION
COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG
CEN-CENELEC Management Centre:
Avenue Marnix 17,
B-1000 Brussels © 2015 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. EN 10346:2015 ESIST EN 10346:2015

Reference method for determination of the zinc, zinc-iron, zinc-aluminium, zinc-magnesium and aluminium-zinc coating mass . 36 A.1 Principle. 36 A.2 Reagent and preparation of the solution . 36 A.2.1 Reagent. 36 A.2.2 Preparation of the solution . 36 A.3 Apparatus . 36 A.4 Procedure . 36 Annex B (normative)
Reference method for determination of the aluminium-silicon coating mass . 37 B.1 Principle. 37 B.2 Reagents. 37 B.3 Procedure . 37 B.3.1 Samples . 37 B.3.2 Method . 37 B.4 Evaluation. 37 Annex C (normative)
Method for determination of the mass of the Al-Fe-Si alloy layer . 38 C.1 Principle. 38 C.2 Reagents. 38 C.2.1 Tin (II) chloride solution . 38 SIST EN 10346:2015

1) Symbol used in the steel name (see Tables 3, 4 and 5). SIST EN 10346:2015

Table 12); i) letter denoting the coating finish (N or M, see 7.4.2 and Table 13); j) letter denoting the surface quality (A, B or C, see 7.5 and Tables 13 to 15); k) letter denoting the surface treatment (C, O, CO, P, PO or S, see 7.6). SIST EN 10346:2015

1 sheet EN 10143 — 0,80Sx1200Sx2500FS — steel EN 10346 — DX53D+Z100–M–B–O or:
1 sheet EN 10143 — 0,80Sx1200Sx2500FS — steel EN 10346 — 1.0951+Z100 –M–B–O. 5.2 Options A number of options are specified in this document and listed below. lf the purchaser does not indicate a wish to implement any of these options, the products shall be supplied in accordance with the basis specification of this document (see 5.1). 1) Specification of product thicknesses deviating from those generally covered in the scope (i.e. t < 0,20 mm or=3=mm=≤=t ≤=6,5=mmc=(see=Clause 1); 2) Specification of hot rolled products deviating from those generally covered in the scope (see NOTE 3 to Clause 1); 3) verification of the product analysis (see 7.1); 4) date of supply for products free from stretcher strains when cold forming (see 7.2.1.3); 5) products supplied suitable for the manufacture of a specific part (see 7.2.2.2 and 7.2.4.2); 6) coating masses different from those of Table 12 and/or special requirements for different coating masses on each surface (see 7.3.2); 7) special coatings and/or surface qualities (see Tables 13 and 15 footnote a); 8) hot-dip zinc coated products with pronounced spangle (see 7.4.2.1 or 7.4.6); 9) special requirements for a maximum Al-Fe-Si alloy layer mass occurring during hot-dip aluminium-silicon coating (see 7.4.7); 10) hot-dip coated products with surface quality A without skin passing (see 7.5.2.1); 11) requirement for special applications on bright appearance for aluminium-silicon coated products (type B surface, see NOTE to 7.5.2.2); 12) range and verification of surface roughness (see 7.5.3); 13) selection of the protective oil (see 7.6.1); 14) type of S coating (see 7.6.6); 15) products free from coil breaks (see 7.7.1); 16) maximum or minimum value for the coating mass on each product side (see 7.9); 17) type of inspection and, if applicable, inspection document to be delivered (see 8.1); SIST EN 10346:2015

1,20 0,12
DX52D 1.0918 +Z,+ZF,+ZA,+ZM,+AZ,+AS 0,12 0,50 0,60 0,10 0,045 0,30 DX53D 1.0951 +Z,+ZF,+ZA,+ZM,+AZ,+AS DX54D 1.0952 +Z,+ZF,+ZA,+ZM,+AZ,+AS DX55D 1.0962 +AS DX56D 1.0963 +Z,+ZF,+ZA,+ZM,+AZ,+AS DX57D 1.0853 +Z,+ZF,+ZA,+ZM,+AS a By agreement at the time of enquiry and order, the content of Ti for the steel grades mentioned in this Table may be lowered to < 0,05% which means that the steel grade is non alloyed. Table 2 — Chemical composition (cast analysis) of steels for construction Designation Chemical composition
% by mass
max. Steel grade Symbols for the types of available coatings C Si Mn P S Steel name Steel number S220GD 1.0241 +Z,+ZF,+ZA,+ZM,+AZ 0,20 0,60 1,70 0,10 0,045 S250GD 1.0242 +Z,+ZF,+ZA,+ZM,+AZ,+AS S280GD 1.0244 +Z,+ZF,+ZA,+ZM,+AZ,+AS S320GD 1.0250 +Z,+ZF,+ZA,+ZM,+AZ,+AS S350GD 1.0529 +Z,+ZF,+ZA,+ZM,+AZ,+AS S390GD 1.0238 +Z,+ZF,+ZA,+ZM,+AZ S420GD 1.0239 +Z,+ZF,+ZA,+ZM,+AZ S450GD 1.0233 +Z,+ZF,+ZA,+ZM,+AZ S550GD 1.0531 +Z,+ZF,+ZA,+ZM,+AZ By agreement at the time of enquiry and order, if other chemical elements are added, they shall be mentioned on the inspection document which may need a change of classification. SIST EN 10346:2015

Steel grade Symbols for the types of available coatings C max. Si max. Mn max. P max. S max. Altotal
Nb max. Ti max. Steel name Steel number HX160YD 1.0910 +Z,+ZF,+ZA, +ZM,+AZ,+AS
0,01 0,30 0,60 0,060 0,025 ≥=0,010 0,09 0,12 HX180YD 1.0921 0,01 0,30 0,70 0,060 0,025 ≥=0,010 0,09 0,12 HX180BD 1.0914 0,06 0,50 0,70 0,060 0,025 ≥=0,015 0,09 0,12 HX220YD 1.0923 0,01 0,30 0,90 0,080 0,025 ≥=0,010 0,09 0,12 HX220BD 1.0919 0,08 0,50 0,70 0,085 0,025 ≥=0,015 0,09 0,12 HX260YD 1.0926 0,01 0,30 1,60 0,10 0,025 ≥=0,010 0,09 0,12 HX260BD 1.0924 0,10 0,50 1,00 0,10 0,030 ≥=0,010 0,09 0,12 HX260LAD 1.0929 0,11 0,50 1,00 0,030 0,025 ≥=0,015 0,09 0,15 HX300YD 1.0927 0,015 0,30 1,60 0,10 0,025 ≥=0,010 0,09 0,12 HX300BD 1.0930 0,11 0,50 0,80 0,12 0,025 ≥=0,010 0,09 0,12 HX300LAD 1.0932 0,12 0,50 1,40 0,030 0,025 ≥=0,015 0,09 0,15 HX340BD 1.0945 0,11 0,50 0,80 0,12 0,025 ≥=0,010 0,09 0,12 HX340LAD 1.0933 0,12 0,50 1,4 0,030 0,025 ≥=0,015 0,10 0,15 HX380LAD 1.0934 0,12 0,50 1,5 0,030 0,025 ≥=0,015 0,10 0,15 HX420LAD 1.0935 0,12 0,50 1,6 0,030 0,025 ≥=0,015 0,10 0,15 HX460LAD 1.0990 0,15 0,50 1,7 0,030 0,025 ≥=0,015 0,10 0,15 HX500LAD 1.0991 0,15 0,50 1,7 0,030 0,025 ≥=0,015 0,10 0,15 SIST EN 10346:2015

max. max. max. max. dual-phase steels (X) HCT 450X 1.0937 +Z,+ZF, +ZA,+ZM 0,14 0,75 2,00 0,080 0,015 0,015 to 1,0 1,00 0,15 0,20 0,005 HCT 490X 1.0995 +Z,+ZF, +ZA,+ZM 0,14 0,75 2,00 0,080 0,015 0,015 to 1,0 1,00 0,15 0,20 0,005 HCT 590X 1.0996 +Z,+ZF, +ZA,+ZM 0,15 0,75 2,50 0,040 0,015 0,015 to 1,5 1,40 0,15 0,20 0,005 HCT 780X 1.0943 +Z,+ZF, +ZA,+ZM 0,18 0,80 2,50 0,080 0,015 0,015 to 2,0 1,40 0,15 0,20 0,005 HCT 980X 1.0944 +Z,+ZF, +ZA,+ZM 0,20 1,00 2,90 0,080 0,015 0,015 to 2,0 1,40 0,15 0,20 0,005 HCT 980XGa 1.0997 +Z,+ZF, +ZA,+ZM 0,23 1,00 2,90 0,080 0,015 0,015 to 2,0 1,40 0,15 0,20 0,005 transformation induced plasticity steels (T) HCT 690T 1.0947 +Z,+ZF, +ZA, +ZM 0,24 2,00 2,20 0,080 0,015 0,015 to 2,0 0,60 0,20 0,20 0,005 HCT 780T 1.0948 +Z,+ZF, +ZA, +ZM 0,25 2,20 2,50 0,080 0,015 0,015 to 2,0 0,60 0,20 0,20 0,005 complex-phase steels (C) HCT 600C 1.0953 +Z,+ZF, +ZA, +ZM 0,18 0,80 2,20 0,080 0,015 0,015 to 2,0 1,00 0,15 0,20 0,005 HCT 780C 1.0954 +Z,+ZF, +ZA, +ZM 0,18 1,00 2,50 0,080 0,015 0,015 to 2,0 1,00 0,15 0,20 0,005 HCT 980C 1.0955 +Z,+ZF, +ZA, +ZM 0,23 1,00 2,70 0,080 0,015 0,015 to 2,0 1,00 0,15 0,22 0,005 a XG means dual-phase steel with increased yield strength. SIST EN 10346:2015

max. max. max. max. ferritic-bainitic steels (F) HDT450F 1.0961 +Z,+ZF, +ZM 0,18 0,50 2,00 0,050 0,010 0,015 to 2,0 1,00 0,15 0,15 0,005 HDT580F 1.0994 +Z,+ZF, +ZM 0,18 0,50 2,00 0,050 0,010 0,015 to 2,0 1,00 0,15 0,15 0,01 dual-phase steel (X) HDT580X 1.0936 +Z,+ZF, +ZM 0,14 1,0 2,20 0,085 0,015 0,015 to 1,0 1,40 0,15 0,20 0,005 complex-phase steels (C) HDT750C 1.0956 +Z,+ZF, +ZM 0,18 0,80 2,20 0,080 0,015 0,015 to 2,0 1,00 0,15 0,20 0,005 HDT760C 1.0998 +Z,+ZF, +ZM 0,18 1,00 2,50 0,080 0,015 0,015 to 2,0 1,00 0,25 0,20 0,005 HDT950C 1.0958 +Z,+ZF, +ZM 0,25 0,80 2,70 0,080 0,015 0,015 to 2,0 1,20 0,25 0,30 0,005 SIST EN 10346:2015

Rea MPag Tensile strength
Rm MPag Elongation
A80b % min. Plastic strain ratio
r90 min. Strain hardening exponent
n90 min. Steel grade Symbols for the types of available coatings Steel name Steel number DX51D 1.0917 +Z,+ZF,+ZA,+ZM,+AZ,+AS, – 270 to 500 22 – – DX52D 1.0918 +Z,+ZF,+ZA,+ZM +AZ,+AS 140 to 300c 270 to 420 26 – – DX53D 1.0951 +Z,+ZF,+ZA,+ZM +AZ,+AS 140 to 260 270 to 380 30 – – DX54D 1.0952 +Z,+ZA 120 to 220 260 to 350 36 1,6d 0,18 DX54D 1.0952 +ZF,+ZM 120 to 220 260 to 350 34 1,4d 0,18 DX54D 1.0952 +AZ 120 to 220 260 to 350 36 – – DX54D 1.0952 +AS 120 to 220 260 to 350 34 1,4d, e 0,18e DX55Df 1.0962 +AS 140 to 240 270 to 370 30 – – DX56D 1.0963 +Z,+ZA 120 to 180 260 to 350 39 1,9d 0,21 DX56D 1.0963 +ZF,+ZM 120 to 180 260 to 350 37 1,7d, e 0,20e DX56D 1.0963 +AZ, +AS 120 to 180 260 to 350 39 1,7d, e 0,20e DX57D 1.0853 +Z, +ZA 120 to 170 260 to 350 41 2,1d 0,22 DX57D 1.0853 +ZF,+ZM 120 to 170 260 to 350 39 1,9d, e 0,21e DX57D 1.0853 +AS 120 to 170 260 to 350 41 1,9d, e 0,21e a If the yield point is not pronounced, the values apply to the 0,2 %-proof strength Rp0,2; if the yield strength is pronounced, the values apply to the lower yield point ReL. b
Decreased minimum elongation values apply for product thickness
0,50mm < t < 0,70mm (minus 2 units),
0,35mm < t < 0,50mm (minus 4 units) and
t < 0,35mm (minus 7 units) . c For surface quality A, the upper value for yield strength Re is 360 MPa. d Decreased minimum r90-values apply for product thickness
1,5mm < t < 2 mm (minus 0,2)
t ≥=2=mm=(minus=0,4c e Decreased minimum r90-values apply for product thickness
0,50mm < t < 0,70mm (minus 0,2),
0,35mm < t < 0,50mm (minus 0,4) and
t < 0,35mm (minus 0,6) apply.
Decreased minimum n90-values apply for product thickness
0,50mm < t < 0,70mm (minus 0,01),
0,35mm < t < 0,50mm (minus 0,03) and
t < 0,35mm (minus 0,04) apply. f The minimum elongation of products made of DX55D+AS which does not follow the systematic order should be noted. DX55D+AS
is chararacterized by the best heat resistance. g 1 MPa = 1 N/mm2. SIST EN 10346:20
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