Page 24 STAINLESS STEEL

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Ophelia Harrison
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1 Pge 24 STAINLESS STEEL 1. SCOPE This section dels with stinless steel nd ojects mde exclusively from stinless steel which s finished products re intended to e in direct contct with food products. It does not involve mterils nd ojects in stinless steel which re not intended, under norml terms of use or other generlly expected conditions, to e in contct with foodstuffs (prticulry pump xles). The min exmples of use for the different ctegories of stinless steels re specified in Annex B of stndrd NF A Definitions of performnce criteri for food contct 2.1. Texts to e used Regultory texts Order of 13th Jnury 1976 relting to mterils nd ojects in stinless steel in contct with foodstuffs. Order of 15th Novemer 1945 setting the list of mterils likely to e used without dverse effect on pulic helth in the mnufcturing of mesuring instruments Other texts Stndrd NF A ": Non pckging steel Stinless steel intended for use in contct with foodstuffs, products nd everges for humn nd niml consumption. Informtion document BP A "Clening stinless steels in food nd helth pplictions 2.2 Criteri to e used Composition ccording to the order of 13th Jnury ACCEPTABILITY LIMITS Minimum chromium content: 13.0 p 100 Possile dded elements: T, N, Zr, Mo, Ti, Al, Cu with the following imum contents: -1 p 100 for T, N, Zr -4 p 100 for Mo, Ti, Al, Cu Elements which re not mentionned in the order my e used within the limits of chemicl composition defined in the ttched tles 1 to 4.

2 Type of steel Nme Numer C Mx. Si Pge 25 Tle 1 Chemicl composition (csting nlysis ) of ferritic stinless steels Mn. P. S N. X1CrN to to 0.60 X6Cr < to Cr Mo N Ni Ti Others X6CrAl < to Al : 0.10 to 0.30 X2CrTi < to to 0.60 X6Cr < to X3CrTi < to (C+N)+0.15<Ti<0.80 c X3CrN < to x C to 1.00 X6CrMo < to to 1.40 X2CrMoTi < to to to 0.60 X2CrMoTi < to to (C+N)+0.15<Ti<0.80 c X6CrNi17-1 *) *) < to to 1.60 X6CrMoN < to to (C+N)+0.10<N<1.00 X2CrNZr17 *) *) < to to 0.55 Zr>7x(C+N)+0.15 X2CrAlTi < to (C+N)+0.15<Ti<0.80 c Al : 1.70 to 2.10 X2CrTiN < to C+0.3< N < to 0.60 X2CrMoTi < to to (C+N)+0.15<Ti<0.80 c The elements which re not included this tle cnnot e dded intentionlly into the steel composition without the greement of the purchser,excepted those intended to produce the csting. All precutions must e tken to void the dditon of elements from the scrp metl nd rw mterils used in production of elements likelly to ffect the mechnicl chrcteristics s well s the suitility for use of steel. As fr s rs, mchine wire, profiles nd the semi-finished products re concerned, imum sulphur content of 0.030% pplies. For ll products intended to e mchined, controlled sulphur content etween nd 0.030% is recommended nd uthorised. c The steel cn e stilized y using of Titnium, Nioium or Zirconium. Tking into ccount the tomic weights of these elements nd the Cron nd Nitrogen content, the equivlence shll e : Ti 7 N 4 7 Zr 4 *) Grde of steel ptented

3 Pge 26 Tle 2 Chemicl composition (csting nlysis ) of mrtensitic stinless steels nd under precipittion hrdening tretement Type of steel Nme Numer C Si. Mn P. S Cr Cu Mo N Ni Others X12Cr to c to X20Cr to < c to X30Cr to < c to X38CrMo to < to to 1.00 X39Cr to < c to X46Cr to < c to X50CrMoV to < c to to 0.80 V = 0.10 to 0.20 X70CrMo to < c to to 0.80 X39CrMo to < c to to 1.30 < 1.00 X105CrMo to < c to to 0.80 X90CrMoV to < c to to 1.30 V = 0.07 to 0.12 X17CrNi to < c to to 2.50 X2CrNiMoV to to to 6.50 Ti: V: 0.10 to 0.50 X3CrNiMo < to to to 4.50 N > X4CrNiMo < c to to to 6.00 N > X5CrNiCuN < c to to x C to to 5.00 X6NiCrTiMoVB to to to to B: to Al: 0.35 Ti: 1.90 to 2.30 V: 0.10 to 0.50 X7CrNiAl < to to 7.80 d Al = 0.70 to 1.50 X8CrNiMoAl < < to to to 7.80 Al = 0.70 to 1.50 X5CrNiMoCuN < < to to to to to 6.00 The elements wich re not included in the tle cnnot e dded intentionlly into the steel composition without the greement of the purchser, excepted of those intended to produce csting. All precutions must e tken to void the ddition of elements from the scrp metl nd rw mterils used in the production of elements likely to ffect the mechnicl chrcteristics s well s the suitility for use of steel. During clls for tender nd order more limited cron contents cn e defined. As fr s rs, mchine wire, profiles nd the semi-finished products re concerned, imum sulphur content of 0.030% pplies. For ll products intended to e mchined, controlled sulphur content etween nd 0.030% is recommended nd uthorised. d For etter cold deformility, the upper limit cn e incresed to 8.30%.

4 Pge 27 Tle 3 Chemicl composition (csting nlysis ) of ustenitic stinless steels Type of steel Nme Numer C Si Mn P S N Cr Cu Mo N Ni Ti X5CrNi to to 8.00 X10CrNi to to to X10CrNi to < to to 9.50 X2CrNiN to to to 8.00 X2CrNi X2CrNi X2CrNiN X5CrNi X6CrNiTi < to to < to to c to to to < to to to to c 5xC to 0.70 X6CrNiN to xC to to c X4CrNi < to to X1CrNi < to < to X2CrNiMo X2CrNiMoN X5CrNiMo < to to to c to to to to c < to to to X1CrNiMoN to to to to X6CrNiMoTi to to to c 5xC to 0.70 X6CrNiMoN to to xC to to X2CrNiMo < to to to X2CrNiMoN to to to to c X8CrMnNiN to to to to to to 6.00 X8CrMnCuNB *) to to to to X11CrNiMnN to to to to to to 8.50 "to e continued "

5 Pge 28 Tle 3 Chemicl composition (csting nlysis ) of ustenitic stinless steels (second prt) Type of steel Nme Numer C Si Mn P S N Cr Cu Mo N Ni Ti. X3CrNiMo < to to to c X2CrNiMo < to to to X2CrNiMoN to to < to c X2CrNiMo < to < to c X1CrNiSi to < to < to X12CrMnNiN to to to to 5.50 X2CrMnNiN to to to to 5.50 X12CrMnNiN to to to to 6.00 X3CrNiCu to < to to to 9.00 X3CrNiCu < to to to X3CrNiCuMo < to to to to X1NiCrMoCu < to to 1.50 < to The elements wich re not included in the tle cnnot e dded intentionlly into the steel composition without the greement of the purchser, excepted of those intended to produce csting. All precutions must e tken to void ddition of elements from the scrp metl nd rw mterils used in the production of elements likely to ffect the mechnicl chrcteristics s well s the suitility for use of steel. As fr s rs, mchine wire, profiles nd the semi-finished products re concerned, imum sulphur content of 0.030% pplies. For ll products intended to e mchined, controlled sulphur content etween nd 0.030% is recommended nd uthorised. c When it is necessry to minimise the ferrite delt content for specil resons, for exmple forgeility of unsoldered tues or low mgnetic permeility, the imum Ni content cn e incresed to the following vlues: 0.50 % (m/m) : 1.00 % (m/m) : 1.50 % (m/m) : *) Grde of steel ptented. The Boron content is: B: to , , , , , ,

6 Pge 29 Tle 4 Chemicl composition (csting nlysis) of usteno-ferritic stinless steels Description Nme Numer C Si Mn P S N Cr Cu Mo Ni W X2CrNiN23-4 *) *) to to to to to 5.50 X2CrNiCuN to to to to to X2CrNiMoN to to to to to X2CrNiMoSi to to to to to to 5.20 X3CrNiMoN to to to to 6.50 X2CrNiMoN to to to to 6.50 X2CrNiMoCuN to to to to to 7.50 X2CrNiMoN *) *) to to to to 8.00 X2CrNiMoCuWN to to to to to to 1.00 The elements wich re not included in the tle cnnot e dded intentionlly into the steel composition without the greement of the purchser, excepted of those intended to produce csting. Every precution must e tken to void ddition of elements from the scrp metl nd rw mterils used in the production of element likely to ffect the mechnicl chrcteristics s well s the suitility for use of steel. As fr s rs, mchine wire, profiles nd the semi-finished products re concerned, imum sulphur content of 0.030% pplies. For ll products intended to e mchined, controlled sulphur content etween nd 0.030% is recommended nd uthorised. *) Grde of steel ptented.

Thread milling tools WHS 331 WHL 332 WHA 333 WHB 334 WHC 335 WHD 337. Stahl unlegiert Acier non allié Steel unalloyed

Thread milling tools WHS 331 WHL 332 WHA 333 WHB 334 WHC 335 WHD 337. Stahl unlegiert Acier non allié Steel unalloyed Overview tred milling tools Technicl informtion 7 roduct lines nd ccurcy clsses of UTILIS STANDARD-LINE 330 Thred milling tools WHS 331 WHL 332 WHA 333 WHB 334 WHC 335 WHD 337 Sthl unlegiert Acier non