{"id":1401,"date":"2026-04-02T16:09:05","date_gmt":"2026-04-02T08:09:05","guid":{"rendered":"https:\/\/www.jycomat.com\/?post_type=product&p=1401"},"modified":"2026-04-02T16:10:06","modified_gmt":"2026-04-02T08:10:06","slug":"aisi-4340-steel-36crnimo4-1-6511-en24-817m40-sncm439","status":"publish","type":"product","link":"https:\/\/www.jycomat.com\/sk\/produkt\/aisi-4340-steel-36crnimo4-1-6511-en24-817m40-sncm439\/","title":{"rendered":"AISI 4340 oce\u013e \/ 36CrNiMo4 \/ 1.6511 \/ EN24 \/ 817M40 \/ SNCM439"},"content":{"rendered":"
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\u0160pecifik\u00e1cia ocele AISI 4340 a pr\u00edslu\u0161n\u00e9 normy<\/h3>
Krajina<\/td>USA<\/td>Brit\u00e1nia<\/td>Brit\u00e1nia<\/td>Japonsko<\/td><\/tr>
\u0160tandard<\/td>ASTM A29<\/td>EN 10250<\/td>BS 970<\/td>JIS G4103<\/td><\/tr>
Triedy<\/td>4340<\/td>36CrNiMo4\/
1.6511<\/td>		EN24\/817M40<\/td>SNCM 439\/SNCM8<\/td><\/tr><\/tbody><\/table><\/div>

ASTM 4340 Ocele a ekvivalenty Chemick\u00e9 zlo\u017eenie<\/h3>
\u0160tandard<\/td>Trieda<\/td>C<\/td>Mn<\/td>P<\/td>S<\/td>Si<\/td>Ni<\/td>Cr<\/td>Mo<\/td><\/tr>
ASTM A29<\/td>4340<\/td>0.38-0.43<\/td>0.60-0.80<\/td>0.035<\/td>0.040<\/td>0.15-0.35<\/td>1.65-2.00<\/td>0.70-0.90<\/td>0.20-0.30<\/td><\/tr>
EN 10250<\/td>36CrNiMo4\/
1.6511<\/td>		0.32-0.40<\/td>0.50-0.80<\/td>0.035<\/td>0.035<\/td>\u22660.40<\/td>0.90-1.20<\/td>0.90-1.2<\/td>0.15-0.30<\/td><\/tr>
BS 970<\/td>EN24\/817M40<\/td>0.36-0.44<\/td>0.45-0.70<\/td>0.035<\/td>0.040<\/td>0.1-0.40<\/td>1.3-1.7<\/td>1.00-1.40<\/td>0.20-0.35<\/td><\/tr>
JIS G4103<\/td>SNCM 439\/SNCM8<\/td>0.36-0.43<\/td>0.60-0.90<\/td>0.030<\/td>0.030<\/td>0.15-0.35<\/td>1.60-2.00<\/td>0.60-1.00<\/td>0.15-0.30

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Mechanick\u00e9 vlastnosti ocele AISI Alloy 4340<\/h3>
Mechanick\u00e9 vlastnosti

(tepelne spracovan\u00fd stav )<\/p><\/td>

Stav<\/td>Rozhoduj\u00faca \u010das\u0165
mm<\/td>		Pevnos\u0165 v \u0165ahu MPa<\/td>V\u00fd\u0165a\u017enos\u0165
MPa<\/td>		Elong.
%<\/td>		Izod Impact
J<\/td>		Brinell
Tvrdos\u0165<\/td><\/tr>
T<\/td>250<\/td>850-1000<\/td>635<\/td>13<\/td>40<\/td>248-302<\/td><\/tr>
T<\/td>150<\/td>850-1000<\/td>665<\/td>13<\/td>54<\/td>248-302<\/td><\/tr>
U<\/td>100<\/td>930-1080<\/td>740<\/td>12<\/td>47<\/td>269-331<\/td><\/tr>
\u00a0<\/td><\/tr>
V<\/td>63<\/td>1000-1150<\/td>835<\/td>12<\/td>47<\/td>293-352<\/td><\/tr>
W<\/td>30<\/td>1080-1230<\/td>925<\/td>11<\/td>41<\/td>311-375<\/td><\/tr>
X<\/td>30<\/td>1150-1300<\/td>1005<\/td>10<\/td>34<\/td>341-401<\/td><\/tr>
\u00a0<\/td><\/tr>
Y<\/td>30<\/td>1230-1380<\/td>1080<\/td>10<\/td>24<\/td>363-429<\/td><\/tr>
Z<\/td>30<\/td>1555-<\/td>1125<\/td>5<\/td>10<\/td>444-<\/td><\/tr><\/tbody><\/table><\/div>

Tepeln\u00e9 vlastnosti<\/h3>
Vlastnosti<\/td>Metrick\u00e9<\/td>Imperial<\/td><\/tr>
Koeficient tepelnej roz\u0165a\u017enosti (20 \u00b0C\/68 \u00b0F, vzorka vytvrden\u00e1 v oleji, teplota 600 \u00b0C (1110 \u00b0F))<\/td>12,3 \u00b5m\/m\u00b0C<\/td>6,83 \u00b5in\/in\u00b0F<\/td><\/tr>
Tepeln\u00e1 vodivos\u0165 (typick\u00e1 oce\u013e)<\/td>44,5 W\/mK<\/td>309 BTU v h.ft\u00b2.\u00b0F<\/td><\/tr><\/tbody><\/table><\/div>

Kovanie legovanej ocele 4340<\/h3>

Najsk\u00f4r oce\u013e 4340 predhrejte, zahrejte na 1150 \u00b0C - maxim\u00e1lne 1200 \u00b0C na kovanie, dr\u017ete, k\u00fdm teplota nie je rovnomern\u00e1 v celej \u010dasti.<\/p>

Nekujte pri teplote ni\u017e\u0161ej ako 850 \u00b0C. 4340 m\u00e1 dobr\u00e9 kov\u00e1\u010dske vlastnosti, ale pri ochladzovan\u00ed treba d\u00e1va\u0165 pozor, preto\u017ee oce\u013e vykazuje n\u00e1chylnos\u0165 na praskanie. Po kovan\u00ed by sa mal obrobok chladi\u0165 \u010do najpomal\u0161ie. Odpor\u00fa\u010da sa chladenie v piesku alebo suchom v\u00e1pne at\u010f.<\/p>\t\t\t\t\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>","protected":false},"excerpt":{"rendered":"

Oce\u013e AISI 4340 je n\u00edzkolegovan\u00e1 oce\u013e so stredn\u00fdm obsahom uhl\u00edka, zn\u00e1ma svojou h\u00fa\u017eevnatos\u0165ou a pevnos\u0165ou v relat\u00edvne ve\u013ek\u00fdch profiloch. AISI 4340 je tie\u017e jedn\u00fdm z druhov nikel-chr\u00f3m-molybd\u00e9nov\u00fdch ocel\u00ed. Legovan\u00e1 oce\u013e 4340 sa vo v\u0161eobecnosti dod\u00e1va kalen\u00e1 a pop\u00fa\u0161\u0165an\u00e1 v \u0165ahovom rozsahu 930 - 1080 Mpa.<\/p>","protected":false},"featured_media":1402,"comment_status":"closed","ping_status":"closed","template":"","meta":{"site-sidebar-layout":"no-sidebar","site-content-layout":"","ast-site-content-layout":"full-width-container","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"disabled","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"default","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}}},"product_brand":[],"product_cat":[22],"product_tag":[64],"class_list":["post-1401","product","type-product","status-publish","has-post-thumbnail","product_cat-mold-steel","product_tag-mold-steel","desktop-align-left","tablet-align-left","mobile-align-left","first","instock","shipping-taxable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/www.jycomat.com\/sk\/wp-json\/wp\/v2\/product\/1401","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.jycomat.com\/sk\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.jycomat.com\/sk\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/www.jycomat.com\/sk\/wp-json\/wp\/v2\/comments?post=1401"}],"version-history":[{"count":0,"href":"https:\/\/www.jycomat.com\/sk\/wp-json\/wp\/v2\/product\/1401\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.jycomat.com\/sk\/wp-json\/wp\/v2\/media\/1402"}],"wp:attachment":[{"href":"https:\/\/www.jycomat.com\/sk\/wp-json\/wp\/v2\/media?parent=1401"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.jycomat.com\/sk\/wp-json\/wp\/v2\/product_brand?post=1401"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.jycomat.com\/sk\/wp-json\/wp\/v2\/product_cat?post=1401"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.jycomat.com\/sk\/wp-json\/wp\/v2\/product_tag?post=1401"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}