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2、urchaser .5 5.1 Mandatory information5 5.2 Options .5 5.3 Example of ordering6 6 Manufacturing process .6 6.1 Steelmaking process.6 6.2 Delivery condition6 7 Requirements.6 7.1 Chemical composition 6 7.2 Mechanical properties.7 7.3 Weldability8 7.4 Tolerances8 7.5 Surface condition.8 8 Inspection.8
3、8.1 Types of inspection and inspection documents 8 8.2 Tests to be carried out 9 8.3 Retests, sorting and reprocessing.9 9 Sampling.9 9.1 Frequency of testing .9 9.2 Sampling and test piece preparation.9 10 Test methods10 10.1 Chemical analysis10 10.2 Tensile test.10 10.3 Other testing.10 11 Marking
4、.10 EN 10120:2008 (E) 3 Foreword This document (EN 10120:2008) has been prepared by Technical Committee ECISS/TC 22 “Steels for pressure purposes - Qualities”, the secretariat of which is held by DIN. This European Standard shall be given the status of a national standard, either by publication of a
5、n identical text or by endorsement, at the latest by March 2009, and conflicting national standards shall be withdrawn at the latest by March 2009. This document supersedes EN 10120:1996. NOTE The clauses marked with a point ( ) contain information relating to agreements which are to be made at the
6、time of enquiry and order. The clauses marked by two points () contain information relating to agreements that may be made at the time of enquiry and order. According to the CEN/CENELEC Internal Regulations, the national standards organizations of the following countries are bound to implement this
7、European Standard: Austria, Belgium, Bulgaria, 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 the Un
8、ited Kingdom. EN 10120:2008 (E) 4 1 Scope This European Standard specifies requirements for hot-rolled sheet and strip up to 5 mm thickness of steels listed in Table 1 and intended for the manufacture of welded gas cylinders. The general technical delivery conditions in EN 10021 also apply to produc
9、ts supplied in accordance with this European Standard. 2 Normative references The following referenced documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (includ
10、ing any amendments) applies. EN 10002-1:2001, Metallic materials Tensile testing Part 1: Method of test at ambient temperature EN 10020:2000, Definition and classification of grades of steel EN 10021, General technical delivery conditions for steel products EN 10027-1, Designation systems for steels
11、 Part 1: Steel names EN 10027-2, Designation systems for steels Part 2: Numerical system EN 10051, Continuously hot rolled uncoated plate, sheet and strip of non-alloy and alloy steels Tolerances on dimensions and shape EN 10052:1993, Vocabulary of heat treatment terms for ferrous products EN 10079:
12、2007, Definition of steel products EN 10168, Steel products Inspection documents List of information and description EN 10204, Metallic products Types of inspection documents CEN/TR 10261, Iron and steel Review of available methods of chemical analysis EN ISO 377, Steel and steel products Location a
13、nd preparation of samples and test pieces for mechanical testing (ISO 377:1997) EN ISO 2566-1, Steel Conversion of elongation values Part 1: Carbon and low alloy steels (ISO 2566- 1:1984) EN ISO 14284, Steel and iron Sampling and preparation of samples for the determination of chemical composition (
14、ISO 14284:1996) 3 Terms and definitions For the purposes of this document, the terms and definitions given in EN 10020:2000, EN 10052:1993 (but see 3.1), EN 10079:2007 and the following apply. EN 10120:2008 (E) 5 3.1 normalizing rolling deviating from EN 10052:1993 rolling process in which the final
15、 deformation process is carried out in a certain temperature range leading to a material condition equivalent to that obtained after normalizing so that the specified values of the mechanical properties are retained even after normalizing NOTE The symbol for this delivery condition is N. 4 Classific
16、ation and designation 4.1 Classification The steels specified in this European Standard are non-alloy quality steels in accordance with EN 10020. 4.2 Designation The steel grades are designated with steel names in accordance with EN 10027-1. The corresponding steel numbers have been allocated in acc
17、ordance with EN 10027-2. 5 Information to be supplied by the purchaser 5.1 Mandatory information The following information shall be supplied by the purchaser at the time of enquiry and order: a) quantity required; b) type of flat products (sheet or strip); c) nominal dimensions of the product (lengt
18、h1), width, thickness); d) number of this European Standard; e) steel name or number (see Table 1 or 3); f) delivery condition (see 6.2 and 7.5); g) inspection document to be delivered (see 8.1.1). 5.2 Options A number of options are specified in this European Standard and listed below. If the purch
19、aser does not indicate his wish to implement any of these options the products shall be supplied in accordance with the basic specification (see 5.1). 1) Information on the melting and deoxidation process (see 6.1.1 and 6.1.2) 2) Product analysis (see 7.1.2 and Table 4) 3) Sampling conditions for th
20、e product analysis (see 9.2.2) 1) For sheet only EN 10120:2008 (E) 6 4) Special marking conditions (see Clause 11) 5.3 Example of ordering 10 t sheets with nominal dimensions of thickness = 4,0 mm, width = 600 mm, length = 1 200 mm, made of the steel grade P265NB (1.0423) as specified in EN 10120, d
21、elivered normalized, descaled and oiled, inspection certificate 3.1 in accordance with EN 10204: 10 t sheet 600x1200x4,0 EN 10120 P265NB normalized and oiled EN 10204-3.1 or 10 t sheet 600x1200x4,0 EN 10120 1.0423 normalized and oiled EN 10204-3.1 6 Manufacturing process 6.1 Steelmaking process 6.1.
22、1 The melting and deoxidation process shall be at the discretion of the manufacturer with the limitations to 6.1.2 and 6.1.3 and Table 1, unless otherwise agreed at the time of enquiry and order. 6.1.2 The steel shall be manufactured using the electric arc process or an oxygen process. Other melting
23、 processes may be used by agreement at the time of enquiry and order. On request, the purchaser shall be informed of the process used. 6.1.3 The used type of deoxidation shall ensure that the steel has an acceptable degree of resistance to ageing (see Table 1, footnote b). 6.2 Delivery condition The
24、 delivery condition shall be specified at the time of enquiry and order. Usual delivery conditions are: a) hot rolled and normalized (N)2) ; b) hot rolled (AR). NOTE The delivery condition “hot rolled and normalized2)“ is generally used for gas cylinders which are only stress relieved after welding.
25、 The “hot rolled“ delivery condition is only intended for gas cylinders which are normalized after welding. 7 Requirements 7.1 Chemical composition 7.1.1 Cast analysis The cast analysis reported by the steel producer shall apply and comply with the requirements of Table 1. 7.1.2 Product analysis The
26、 product analysis shall not deviate from the limiting values for the cast analysis as specified in Table 1 by more than the values given in Table 2. 2) This includes the normalizing rolled condition. EN 10120:2008 (E) 7 Table 1 Chemical composition of the cast analysis, in %a Steel grade Steel name
27、Steel number C max. Si max. Mn min. P max. S max. Altotalb min. Nc max. Nb max. Ti max. P245NB 1.0111 0,16 0,25 0,30 0,025 0,015 0,020 0,009 0,050 0,03 P265NB 1.0423 0,19 0,25 0,40 0,025 0,015 0,020 0,009 0,050 0,03 P310NB 1.0437 0,20 0,50 0,70 0,025 0,015 0,020 0,009 0,050 0,03 P355NB 1.0557 0,20 0
28、,50 0,70 0,025 0,015 0,020 0,009 0,050 0,03 a Elements not listed in this table may not be intentionally added to the steel without the agreement of the purchaser except for finishing the cast. All appropriate measures shall be taken to prevent the addition from scrap or other materials used in stee
29、lmaking of these elements which may adversely affect the mechanical properties and usability. b The aluminium content may partly be replaced by 0,050 % Nb and/or 0,03 % Ti (see 6.1.3). In such cases the content of these elements is to be reported in the inspection document. c If the ratio of N total
30、 Al 2,2 or if Nb and/or Ti additions are applied, the nitrogen content may be 0,012 %. Table 2 Permissible product analysis tolerances on the limiting values given in Table 1 for the cast analysis Element Limiting value of the cast analysis Permissible deviation of the product analysis C 0,20 + 0,02
31、 Si 0,50 + 0,05 Mn 0,30 0,05 P 0,025 + 0,005 S 0,015 + 0,003 Altotal 0,020 0,005 N 0,009 + 0,002 Nb 0,050 + 0,010 Ti 0, 03 + 0,01 7.2 Mechanical properties The mechanical properties shall comply with the values in Table 3 which are applicable to samples in the normalized or normalizing rolled condit
32、ion. EN 10120:2008 (E) 8 Table 3 Mechanical properties and guidance for heat treatmenta Steel grade Elongation after fracture A min. for product thickness t in mm Steel name Steel number Upper yield strength ReH min. MPa Tensile strength Rm MPa t 3 (LO = 80 mm) % 3 t 5 (LO = 5,65 o S) % Normalizing
33、temperature (for guidance)b C P245NB 1.0111 245 360 to 450 26 34 900 to 940 P265NB 1.0423 265 410 to 500 24 32 890 to 930 P310NB 1.0437 310 460 to 550 21 28 890 to 930 P355NB 1.0557 355 510 to 620 19 24 880 to 920 a See also 7.2 and 9.2.3. b The normalizing temperatures given here are only mandatory
34、 if reference test pieces are to be tested. 7.3 Weldability The steels in accordance with this European Standard are weldable using the usual fusion welding processes. 7.4 Tolerances Tolerances on dimensions and mass shall be in accordance with EN 10051. 7.5 Surface condition Depending on the specif
35、ied surface condition, the sheet or strip shall be supplied either in the rolled condition or in the chemically or mechanically descaled and oiled condition. External imperfections which do not impair the intended application shall not be the cause of rejection. Only the material involved can be rej
36、ected on the basis of external defects. 8 Inspection 8.1 Types of inspection and inspection documents 8.1.1 The compliance with the requirements of the order shall be checked for products in accordance with this European Standard by specific inspection. The purchaser shall state the required type of
37、 inspection document (3.1 or 3.2) in accordance with EN 10204. If an inspection document 3.2 is specified, the purchaser shall notify the manufacturer of the name and address of the organization or person who is to carry out the inspection and produce the inspection document. It shall be agreed whic
38、h party shall issue the certificate. 8.1.2 The inspection document shall include, in accordance with EN 10168, the following codes and information: EN 10120:2008 (E) 9 A Commercial transactions and parties involved; B Description of products to which the inspection certificate applies; C03 Test temp
39、erature; C10-C13 Tensile test at room temperature; C70 Steelmaking process, if applicable; C71-C92 Cast analysis and, if applicable, product analysis; D01 Marking, dimensional and visual inspection; Z Validation. 8.2 Tests to be carried out The mandatory and optional tests to be carried out, the siz
40、e of the test units, and the number of samples and test pieces to be taken are specified in 10.1 and Table 4. Table 4 Summary of tests and extent of testing Type of inspection and test Test frequencya Refer to Cast analysis 1 per cast 7.1.1 Tensile test 1 per sample 9.1, 9.2 and 10.2 Mandatory tests
41、 Dimensional and visual inspection Each product 10.3.1 and 10.3.2 Optional tests Product analysis 1 per cast 9.1, 9.2 and 10.1 a For sampling and size of test units, see 9.1 and 9.2.1. 8.3 Retests, sorting and reprocessing For retests, sorting and reprocessing the requirements of EN 10021 shall appl
42、y. 9 Sampling 9.1 Frequency of testing 9.1.1 The tests shall be carried out by cast. 9.1.2 The inspection unit shall be 40 t or the remaining fraction. However, a maximum of 4 samples per cast shall be tested. 9.2 Sampling and test piece preparation 9.2.1 Sampling and test piece preparation shall be
43、 in accordance with the requirements of EN ISO 14284 and EN ISO 377. 9.2.2 Unless otherwise agreed at the time of enquiry and order, the sample for the product analysis may be taken from the samples for the tensile test. EN 10120:2008 (E) 10 9.2.3 The test samples for the tensile test shall be taken
44、 at 1/4 product width from the rolled edge. In the case of strip, the test samples shall be taken from the outer end; in cases of dispute, it shall be taken at an adequate distance from the outer end (at least one turn). The longitudinal axis of the test piece shall be perpendicular to the (final) rolling direction. If products are delivered in a