{"id":1527,"date":"2025-10-16T16:37:21","date_gmt":"2025-10-16T08:37:21","guid":{"rendered":"https:\/\/www.xunshi-alloy.com\/?post_type=product&p=1527"},"modified":"2025-10-16T16:37:21","modified_gmt":"2025-10-16T08:37:21","slug":"heat-resistant-alloy-w-nr-2-4778-en-10295","status":"publish","type":"product","link":"https:\/\/www.xunshi-alloy.com\/fr\/produit\/heat-resistant-alloy-w-nr-2-4778-en-10295\/","title":{"rendered":"Alliage r\u00e9sistant \u00e0 la chaleur W.Nr. 2.4778 EN 10295"},"content":{"rendered":"

Le W.Nr. 2.4778 est un alliage de cobalt r\u00e9sistant \u00e0 la chaleur, offrant une excellente r\u00e9sistance aux chocs thermiques et une performance sup\u00e9rieure en mati\u00e8re d\u2019usure. Nous pouvons fournir le W.Nr. 2.4778 sous forme de tiges, de pi\u00e8ces forg\u00e9es, de tubes sans soudure, de tuyaux, etc.<\/p>\n

Chemical Composition (%, EN 10295)<\/b><\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n
C<\/span><\/td>\n0.05-0.25<\/span><\/td>\n<\/tr>\n
Si<\/span><\/td>\n0.50-1.50<\/span><\/td>\n<\/tr>\n
Mn<\/span><\/td>\n1.5<\/span><\/td>\n<\/tr>\n
P<\/span><\/td>\n0.04<\/span><\/td>\n<\/tr>\n
S<\/span><\/td>\n0.03<\/span><\/td>\n<\/tr>\n
Cr<\/span><\/td>\n27-30<\/span><\/td>\n<\/tr>\n
Mo<\/span><\/td>\n0.50<\/span><\/td>\n<\/tr>\n
Ni<\/span><\/td>\n4.0<\/span><\/td>\n<\/tr>\n
Nb<\/span><\/td>\n0.50<\/span><\/td>\n<\/tr>\n
Co<\/span><\/td>\n48-52<\/span><\/td>\n<\/tr>\n
Fe<\/span><\/td>\n\u00c9quilibre<\/span><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

R\u00e9sistances \u00e0 l\u2019usure<\/b>
Quant \u00e0 la r\u00e9sistance \u00e0 l\u2019usure du W.Nr. 2.4778, on n\u2019a constat\u00e9 pratiquement aucune d\u00e9t\u00e9rioration apr\u00e8s son utilisation comme barre de frittage pour le sulfure de cuivre pendant 50 mois. En revanche, les pi\u00e8ces en fonte utilis\u00e9es jusqu\u2019alors \u00e9taient fortement corrod\u00e9es, oxyd\u00e9es et us\u00e9es, bien que les op\u00e9rations aient \u00e9t\u00e9 men\u00e9es \u00e0 900 \u00b0C, ce qui ne leur a permis d\u2019\u00eatre utilisables que pendant trois mois et demi.<\/p>\n

Soudabilit\u00e9<\/b>
Le W.Nr. 2.4778 peut \u00eatre soud\u00e9 par voie arc ou oxy-ac\u00e9tyl\u00e8ne. Lorsque une r\u00e9sistance \u00e0 l\u2019usure encore plus \u00e9lev\u00e9e est requise, il convient d\u2019effectuer une soudure suppl\u00e9mentaire avec des BISHILITE (ALLIAGES DE DURCISSEMENT). Pour souder le W.Nr. 2.4778 \u00e0 de l\u2019acier inoxydable ou \u00e0 de l\u2019acier, on peut utiliser la baguette de soudure MA-W.<\/p>\n

Caract\u00e9ristiques<\/b>
R\u00e9sistance aux hautes temp\u00e9ratures, r\u00e9sistance aux chocs thermiques, r\u00e9sistance \u00e0 l\u2019usure. Points de fusion plus \u00e9lev\u00e9s que ceux des autres alliages \u00e0 base de cobalt et de nickel (1380 - 1395 \u00b0C). R\u00e9sistant \u00e0 la corrosion dans l\u2019acide sulfurique dilu\u00e9 et dans l\u2019acide nitrique bouillant, mais se corrode rapidement dans l\u2019acide chlorhydrique.<\/p>\n

Qualit\u00e9s \u00e9gales<\/b>
Thermco50, Co50, Umco50<\/p>\n

Forme disponible<\/b>
Barres, pi\u00e8ces forg\u00e9es, tubes sans soudure, tuyaux<\/p>","protected":false},"excerpt":{"rendered":"

W.Nr. 2.4778 is a heat-resistant cobalt alloy with excellent thermal shock resistance and wear resistance performance.<\/p>","protected":false},"featured_media":1530,"template":"","meta":{"_acf_changed":false,"_seopress_robots_primary_cat":""},"product_brand":[],"product_cat":[52],"product_tag":[],"class_list":{"0":"post-1527","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-nickel-cobalt-alloy","8":"first","9":"instock","10":"shipping-taxable","11":"product-type-simple"},"acf":[],"_links":{"self":[{"href":"https:\/\/www.xunshi-alloy.com\/fr\/wp-json\/wp\/v2\/product\/1527","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.xunshi-alloy.com\/fr\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/www.xunshi-alloy.com\/fr\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.xunshi-alloy.com\/fr\/wp-json\/wp\/v2\/media\/1530"}],"wp:attachment":[{"href":"https:\/\/www.xunshi-alloy.com\/fr\/wp-json\/wp\/v2\/media?parent=1527"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/www.xunshi-alloy.com\/fr\/wp-json\/wp\/v2\/product_brand?post=1527"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/www.xunshi-alloy.com\/fr\/wp-json\/wp\/v2\/product_cat?post=1527"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/www.xunshi-alloy.com\/fr\/wp-json\/wp\/v2\/product_tag?post=1527"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}