{"id":4137,"date":"2026-10-08T15:37:12","date_gmt":"2026-10-08T15:37:12","guid":{"rendered":"https:\/\/www.tgsteels.com\/hot-work-tool-steels\/1-2365-h10\/"},"modified":"2026-10-08T15:37:12","modified_gmt":"2026-10-08T15:37:12","slug":"1-2365-h10","status":"publish","type":"page","link":"https:\/\/www.tgsteels.com\/en\/hot-work-tool-steels\/1-2365-h10\/","title":{"rendered":"2365 PRIME"},"content":{"rendered":"[vc_row type=”full_width_background” full_screen_row_position=”middle” column_margin=”default” column_direction=”default” column_direction_tablet=”default” column_direction_phone=”default” video_bg=”use_video” video_mp4=”https:\/\/www.tgsteels.com\/wp-content\/uploads\/2025\/09\/hw-hero.mp4″ video_webm=”https:\/\/www.tgsteels.com\/wp-content\/uploads\/2025\/09\/hw-hero.webm” video_ogv=”https:\/\/www.tgsteels.com\/wp-content\/uploads\/2025\/09\/hw-hero.ogv” background_video_loading=”default” scene_position=”center” text_color=”dark” text_align=”left” row_border_radius=”none” row_border_radius_applies=”bg” overflow=”visible” overlay_strength=”0.3″ gradient_direction=”left_to_right” shape_divider_position=”bottom” bg_image_animation=”none” parallax_bg=”true” parallax_bg_speed=”fast” gradient_type=”default” shape_type=””][vc_column column_padding=”no-extra-padding” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”all” column_element_direction_desktop=”default” column_element_spacing=”default” desktop_text_alignment=”default” tablet_text_alignment=”default” phone_text_alignment=”default” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_backdrop_filter=”none” column_shadow=”none” column_border_radius=”none” column_link_target=”_self” column_position=”default” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”1\/2″ tablet_width_inherit=”default” animation_type=”default” bg_image_animation=”none” border_type=”simple” column_border_width=”none” column_border_style=”solid” column_padding_type=”default” gradient_type=”default”][divider line_type=”No Line” custom_height=”450″][vc_column_text css=”” text_direction=”default”]\n

2365 PRIME (1.2365, 32CrMoV12-28, 4Cr3Mo3SiV, SKD7, BH10, H10, Z32DCV28)<\/span><\/h1>\n[\/vc_column_text][divider line_type=”No Line” custom_height=”50″][\/vc_column][vc_column column_padding=”no-extra-padding” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”all” column_element_direction_desktop=”default” column_element_spacing=”default” desktop_text_alignment=”default” tablet_text_alignment=”default” phone_text_alignment=”default” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_backdrop_filter=”none” column_shadow=”none” column_border_radius=”none” column_link_target=”_self” column_position=”default” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”1\/2″ tablet_width_inherit=”default” animation_type=”default” bg_image_animation=”none” border_type=”simple” column_border_width=”none” column_border_style=”solid”][\/vc_column][\/vc_row][vc_row type=”in_container” full_screen_row_position=”middle” column_margin=”default” column_direction=”default” column_direction_tablet=”default” column_direction_phone=”default” scene_position=”center” bottom_padding=”60″ text_color=”dark” text_align=”left” row_border_radius=”none” row_border_radius_applies=”bg” overflow=”visible” overlay_strength=”0.3″ gradient_direction=”left_to_right” shape_divider_position=”bottom” bg_image_animation=”none” gradient_type=”default” shape_type=””][vc_column column_padding=”no-extra-padding” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”all” column_element_direction_desktop=”default” column_element_spacing=”default” desktop_text_alignment=”default” tablet_text_alignment=”default” phone_text_alignment=”default” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_backdrop_filter=”none” column_shadow=”none” column_border_radius=”none” column_link_target=”_self” column_position=”default” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”1\/1″ tablet_width_inherit=”default” animation_type=”default” bg_image_animation=”none” border_type=”simple” column_border_width=”none” column_border_style=”solid”][vc_column_text css=”” text_direction=”default”]\n
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Hot work tool steel with good hot properties and an excellent thermal conductivity for hot work applications with intensive cooling<\/h4>\n<\/div>\n[\/vc_column_text][vc_column_text css=”” text_direction=”default”]\n
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2365 PRIME;<\/p>\n

    \n
  • is a 3% chromium and 2.8% molybdenum hot-work tool steel produced by a process that ensures a good level of cleanliness<\/li>\n
  • has a good hot strength and tempering back resistance.<\/li>\n
  • has an excellent thermal conductivity and is suitable for hot work tools cooled by water.<\/li>\n
  • can also be welded and exhibits good machinability.<\/li>\n
  • has a very good suitability for surface treatments such as gas, ionic or salt bath nitriding, as well as PVD or CVD coatings.<\/li>\n<\/ul>\n<\/div>\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row type=”in_container” full_screen_row_position=”middle” column_margin=”default” column_direction=”default” column_direction_tablet=”default” column_direction_phone=”default” scene_position=”center” bottom_padding=”60″ text_color=”dark” text_align=”left” row_border_radius=”none” row_border_radius_applies=”bg” overflow=”visible” overlay_strength=”0.3″ gradient_direction=”left_to_right” shape_divider_position=”bottom” bg_image_animation=”none” gradient_type=”default” shape_type=””][vc_column column_padding=”no-extra-padding” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”all” column_element_direction_desktop=”default” column_element_spacing=”default” desktop_text_alignment=”default” tablet_text_alignment=”default” phone_text_alignment=”default” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_backdrop_filter=”none” column_shadow=”none” column_border_radius=”none” column_link_target=”_self” column_position=”default” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”1\/1″ tablet_width_inherit=”default” animation_type=”default” bg_image_animation=”none” border_type=”simple” column_border_width=”none” column_border_style=”solid”][vc_column_text css=”” text_direction=”default”]\n
    \n

    Applications<\/h3>\n

    2365 PRIME is suitable for the manufacture of die inserts and forging machine tools, die casting molds of light and heavy alloys, as well as spindles, mandrels and spinning punches.<\/p>\n

    Compared to CUDA PRIME steel (1.2343)<\/em>, 2365 PRIME has a better thermal conductivity and is suitable for hot work tools intensively cooled (by water for example)<\/em>.<\/p>\n<\/div>\n[\/vc_column_text][vc_column_text css=”” text_direction=”default”]\n

    \n

    Main properties<\/h3>\n
      \n
    • Excellent thermal conductivity<\/li>\n
    • Suitable for hot work tools cooled by water<\/li>\n
    • Good hot strength and tempering back resistance<\/li>\n
    • Suitable for surface treatments<\/li>\n<\/ul>\n<\/div>\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row type=”in_container” full_screen_row_position=”middle” column_margin=”default” column_direction=”default” column_direction_tablet=”default” column_direction_phone=”default” scene_position=”center” bottom_padding=”60″ text_color=”dark” text_align=”left” row_border_radius=”none” row_border_radius_applies=”bg” overflow=”visible” overlay_strength=”0.3″ gradient_direction=”left_to_right” shape_divider_position=”bottom” bg_image_animation=”none” gradient_type=”default” shape_type=””][vc_column column_padding=”no-extra-padding” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”all” column_element_direction_desktop=”default” column_element_spacing=”default” desktop_text_alignment=”default” tablet_text_alignment=”default” phone_text_alignment=”default” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_backdrop_filter=”none” column_shadow=”none” column_border_radius=”none” column_link_target=”_self” column_position=”default” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”1\/1″ tablet_width_inherit=”default” animation_type=”default” bg_image_animation=”none” border_type=”simple” column_border_width=”none” column_border_style=”solid”][vc_column_text css=”” text_direction=”default”]\n
      \n

      Chemical composition (typical)<\/em><\/h3>\n<\/div>\n\n\n\n\n\n
      C<\/th>\nMn<\/th>\nSi<\/th>\nP<\/th>\nS<\/th>\nCr<\/th>\nMo<\/th>\nV<\/th>\n<\/tr>\n<\/thead>\n
      0.32<\/td>\n0.30<\/td>\n0.30<\/td>\n\u2264 0.025<\/td>\n\u2264 0.025<\/td>\n3.00<\/td>\n2.80<\/td>\n0.50<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
      \n

      Designation<\/h3>\n<\/div>\n\n\n\n\n\n
      Werkstoff Nr<\/th>\nISO<\/th>\nChina GB<\/th>\nJIS Japan<\/th>\nUK<\/th>\nAISI USA<\/th>\nRussia Gost<\/th>\nAFNOR<\/th>\nOther \/ Special<\/th>\n<\/tr>\n<\/thead>\n
      1.2365<\/td>\n32 CrMoV 12 28<\/td>\n4Cr3Mo3SiV<\/td>\nSKD7<\/td>\nBH10<\/td>\nH10<\/td>\n–<\/td>\nZ32DCV28<\/td>\n–<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row type=”in_container” full_screen_row_position=”middle” column_margin=”default” column_direction=”default” column_direction_tablet=”default” column_direction_phone=”default” scene_position=”center” bottom_padding=”60″ text_color=”dark” text_align=”left” row_border_radius=”none” row_border_radius_applies=”bg” overflow=”visible” overlay_strength=”0.3″ gradient_direction=”left_to_right” shape_divider_position=”bottom” bg_image_animation=”none” gradient_type=”default” shape_type=””][vc_column column_padding=”no-extra-padding” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”all” column_element_direction_desktop=”default” column_element_spacing=”default” desktop_text_alignment=”default” tablet_text_alignment=”default” phone_text_alignment=”default” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_backdrop_filter=”none” column_shadow=”none” column_border_radius=”none” column_link_target=”_self” column_position=”default” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”1\/1″ tablet_width_inherit=”default” animation_type=”default” bg_image_animation=”none” border_type=”simple” column_border_width=”none” column_border_style=”solid”][vc_column_text css=”” text_direction=”default”]\n
      \n

      Structure<\/h3>\n

      The structure of the 2365 PRIME is fine and homogeneous without precipitation or alignments of carbides.<\/p>\n

      Hardness at the time of delivery<\/h3>\n

      Annealed for 230 HB max.<\/p>\n

      Typical mechanical properties in hardened conditions at different temperatures (results from internal tests not indicated on the certificates)<\/em><\/h3>\n<\/div>\n[\/vc_column_text][vc_column_text css=”” text_direction=”default”]\n
      \n

      \"2365<\/p>\n<\/div>\n[\/vc_column_text][vc_column_text css=”” text_direction=”default”]\n

      \n

      Physical properties<\/h3>\n<\/div>\n\n\n\n\n\n\n\n\n
      Temperature<\/th>\n20\u00b0C<\/th>\n200\u00b0C<\/th>\n400\u00b0C<\/th>\n600\u00b0C<\/th>\n<\/tr>\n<\/thead>\n
      Volumic mass kg\/m3<\/sup><\/th>\n7800<\/td>\n7770<\/td>\n7700<\/td>\n7540<\/td>\n<\/tr>\n
      Young Modulus N\/mm\u00b2<\/th>\n205000<\/td>\n198000<\/td>\n177000<\/td>\n130000<\/td>\n<\/tr>\n
      Thermal conductivity W\/m.K<\/th>\n32<\/td>\n31.9<\/td>\n32.5<\/td>\n30<\/td>\n<\/tr>\n
      Coefficient of linear expansion 10-6<\/sup>\/K<\/th>\n12<\/td>\n12.5<\/td>\n13.1<\/td>\n13.5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row type=”in_container” full_screen_row_position=”middle” column_margin=”default” column_direction=”default” column_direction_tablet=”default” column_direction_phone=”default” scene_position=”center” bottom_padding=”60″ text_color=”dark” text_align=”left” row_border_radius=”none” row_border_radius_applies=”bg” overflow=”visible” overlay_strength=”0.3″ gradient_direction=”left_to_right” shape_divider_position=”bottom” bg_image_animation=”none” gradient_type=”default” shape_type=””][vc_column column_padding=”no-extra-padding” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”all” column_element_direction_desktop=”default” column_element_spacing=”default” desktop_text_alignment=”default” tablet_text_alignment=”default” phone_text_alignment=”default” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_backdrop_filter=”none” column_shadow=”none” column_border_radius=”none” column_link_target=”_self” column_position=”default” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”1\/1″ tablet_width_inherit=”default” animation_type=”default” bg_image_animation=”none” border_type=”simple” column_border_width=”none” column_border_style=”solid”][vc_column_text css=”” text_direction=”default”]\n
      \n

      Heat treatment<\/h3>\n

      Soft annealing<\/h4>\n

      Temperature: 730 – 770\u00b0C, duration 1h + 1h for 25 mm thickness. slow cooling in the furnace (10 to 20\u00b0C\/h)<\/em>. The atmosphere in the furnace must be reducing to avoid decarburization of the steel.<\/p>\n

      Stress relieving<\/h4>\n

      After machining, it is recommended to perform stress relieving for a minimum of 2 hours, followed by slow cooling in the furnace to 450\u00b0C.<\/p>\n

      Austenitization<\/h4>\n

      In order to avoid any risk of cracking it is recommended to preheat in 2 steps.<\/p>\n

        \n
      • 1st preheating step: temperature: 550\u00b0C time: 30 s\/mm of thickness<\/li>\n
      • 2nd preheating step: temperature: 750\u00b0C time: 30 s\/mm of thickness<\/li>\n<\/ul>\n

        Recommended austenitizing temperature: 1010 – 1030\u00b0C. The holding time should not be too long to avoid a risk of grain coarsening and a loss of toughness. It is recommended to keep the part at the austenitizing temperature 30 minutes per inch of thickness as soon as the temperature of the surface reach the austenitization temperature.<\/p>\n

        Quenching medium<\/h4>\n

        Oil at 80\u00b0C, vacuum (pressure > 6 bars)<\/em>, salt bath 500 – 550\u00b0C.
        \nTo ensure good toughness, treatment with oil or salt bath is preferable.<\/p>\n

        Tempering<\/h4>\n

        To ensure a minimum residual austenite rate as well as greater tool stability, it is essential to perform a double tempering. It is recommended to perform the first tempering at a temperature of 500\u00b0C to ensure optimal carbide precipitation. The second tempering will be carried out at an appropriate temperature depending on the desired hardness. Each tempering is followed by a cooling under 100\u00b0C.<\/p>\n

        Each tempering time must be at least equal to 1h + 1h for 25 mm of thickness of the treated part (equivalent thermal thickness)<\/em>.<\/p>\n<\/div>\n[\/vc_column_text][vc_column_text css=”” text_direction=”default”]\n

        \n

        \"2365<\/p>\n<\/div>\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row type=”in_container” full_screen_row_position=”middle” column_margin=”default” column_direction=”default” column_direction_tablet=”default” column_direction_phone=”default” scene_position=”center” bottom_padding=”60″ text_color=”dark” text_align=”left” row_border_radius=”none” row_border_radius_applies=”bg” overflow=”visible” overlay_strength=”0.3″ gradient_direction=”left_to_right” shape_divider_position=”bottom” bg_image_animation=”none” gradient_type=”default” shape_type=””][vc_column column_padding=”no-extra-padding” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”all” column_element_direction_desktop=”default” column_element_spacing=”default” desktop_text_alignment=”default” tablet_text_alignment=”default” phone_text_alignment=”default” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_backdrop_filter=”none” column_shadow=”none” column_border_radius=”none” column_link_target=”_self” column_position=”default” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”1\/1″ tablet_width_inherit=”default” animation_type=”default” bg_image_animation=”none” border_type=”simple” column_border_width=”none” column_border_style=”solid”][vc_column_text css=”” text_direction=”default”]\n

        \n

        Surface treatment<\/h3>\n

        Nitriding<\/h4>\n

        2365 PRIME can be nitrided at temperatures less than or equal to 20\u00b0C below tempering temperatures without risk of deterioration of the mechanical characteristics.<\/p>\n

        PVD, CVD<\/h4>\n

        2365 PRIME is suitable for all kinds of PVD and CVD treatment as soon as the treatment temperature is 30\u00b0C lower than the last tempering temperature.<\/p>\n<\/div>\n[\/vc_column_text][vc_column_text css=”” text_direction=”default”]\n

        \n

        Polishing<\/h3>\n

        2365 PRIME is perfectly suitable for polishing in the treated state and can be used for applications requiring a sufficient level of polish for translucent – transparent parts (Rt \u2264 20 \u03bcm, CNOMO level 2, Rugotest N7)<\/em>.<\/p>\n

        Optimal polishing is achieved by performing consecutive steps with similar roughness and stopping each step as soon as the last scratch from the previous step disappears.<\/p>\n

        Texturing<\/h3>\n

        2365 PRIME is suitable for chemical or laser texturing.<\/p>\n<\/div>\n[\/vc_column_text][\/vc_column][\/vc_row][vc_row type=”in_container” full_screen_row_position=”middle” column_margin=”default” column_direction=”default” column_direction_tablet=”default” column_direction_phone=”default” scene_position=”center” bottom_padding=”60″ text_color=”dark” text_align=”left” row_border_radius=”none” row_border_radius_applies=”bg” overflow=”visible” overlay_strength=”0.3″ gradient_direction=”left_to_right” shape_divider_position=”bottom” bg_image_animation=”none” gradient_type=”default” shape_type=””][vc_column column_padding=”no-extra-padding” column_padding_tablet=”inherit” column_padding_phone=”inherit” column_padding_position=”all” column_element_direction_desktop=”default” column_element_spacing=”default” desktop_text_alignment=”default” tablet_text_alignment=”default” phone_text_alignment=”default” background_color_opacity=”1″ background_hover_color_opacity=”1″ column_backdrop_filter=”none” column_shadow=”none” column_border_radius=”none” column_link_target=”_self” column_position=”default” gradient_direction=”left_to_right” overlay_strength=”0.3″ width=”1\/1″ tablet_width_inherit=”default” animation_type=”default” bg_image_animation=”none” border_type=”simple” column_border_width=”none” column_border_style=”solid”][vc_column_text css=”” text_direction=”default”]\n

        \n

        Machining<\/h3>\n

        The machining parameters below are given for information only and must be adapted according to the equipment and usual machining conditions.<\/p>\n

        Turning<\/h4>\n<\/div>\n\n\n\n\n\n\n\n
        <\/th>\nCarbide tool
        Rough machining<\/th>\n        		Carbide tool
        Finishing<\/th>\n        		HSS tool
        Finishing<\/th>\n<\/tr>\n<\/thead>\n
        Cutting speed m\/min<\/th>\n140 – 180<\/td>\n180 – 230<\/td>\n17 – 22<\/td>\n<\/tr>\n
        Feed mm\/r<\/th>\n0.2 – 0.4<\/td>\n0.1 – 0.2<\/td>\n0.1 – 0.3<\/td>\n<\/tr>\n
        Depth of cut mm<\/th>\n2 – 4<\/td>\n0.5 – 2<\/td>\n0.5 – 2<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
        \n

        Milling: surfacing<\/h4>\n<\/div>\n\n\n\n\n\n\n\n
        <\/th>\nMilling with carbide tools
        Rough machining<\/th>\n        		Milling with carbide tools
        \u00bd Finishing<\/th>\n        		Solid tool
        Finishing<\/th>\n<\/tr>\n<\/thead>\n
        Cutting speed m\/min<\/th>\n160 – 180<\/td>\n180 – 200<\/td>\n210 – 280<\/td>\n<\/tr>\n
        Feed mm\/r<\/th>\n0.45<\/td>\n0.4 – 0.25<\/td>\n0.15 – 0.05<\/td>\n<\/tr>\n
        Depth of cut mm<\/th>\n1 – 3<\/td>\n1 – 2<\/td>\n1 – 0.5<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
        \n

        Drilling: carbide drill<\/h4>\n<\/div>\n\n\n\n\n\n\n
        Carbide type<\/th>\nIndexable insert<\/th>\nSolid carbide<\/th>\nCarbide tip<\/th>\n<\/tr>\n<\/thead>\n
        Cutting speed m\/min<\/th>\n160 – 180<\/td>\n100 – 130<\/td>\n55 – 80<\/td>\n<\/tr>\n
        Feed mm\/t<\/th>\n0.05 – 0.10<\/td>\n0.10 – 0.25<\/td>\n0.15 \u2013 0.25<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
        \n

        Drilling: HSS twist drill<\/h4>\n<\/div>\n\n\n\n\n\n\n\n\n
        Drill diameter mm<\/th>\nCutting speed m\/min<\/th>\nFeed mm\/t<\/th>\n<\/tr>\n<\/thead>\n
        < 5<\/td>\n14 – 16<\/td>\n0.05 – 0.15<\/td>\n<\/tr>\n
        5 – 10<\/td>\n14 – 16<\/td>\n0.15 – 0.20<\/td>\n<\/tr>\n
        10 – 15<\/td>\n14 – 16<\/td>\n0.20 – 0.25<\/td>\n<\/tr>\n
        15 – 20<\/td>\n14 – 16<\/td>\n0.25 – 0.30<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
        \n

        Fine grinding<\/h4>\n

        General indications for grinding wheels to be used on 2365 PRIME in the heat treated condition<\/p>\n

        Usually, rather soft vitrified aluminum oxide grinding wheels (grades G for plane grinding to K for cylindrical grinding)<\/em> are used.<\/p>\n

        Particular attention will be paid to effective cooling of the surface during grinding to prevent degradation of the material surface.<\/p>\n<\/div>\n[\/vc_column_text][vc_column_text css=”” text_direction=”default”]\n

        \n

        Electro-discharge machining<\/h4>\n

        2365 PRIME is also suitable for EDM machining (wire or electrode)<\/em>. Preferably, the machining will be carried out with a low current density and a high frequency in order to limit the thickness of the white layer as much as possible.<\/p>\n

        Then it is necessary to carry out a stress relieving at 25\u00b0C below the last tempering in order to reduce the level of residual stresses (which could lead to a risk of cracking)<\/em> and to carry out a polishing to completely remove the white layer formed during the discharge machining process.<\/p>\n

        Welding<\/h3>\n

        It is not recommended to weld 2365 PRIME but if this is mandatory it could be welded either in the annealed condition (better)<\/em> or in the heat treated condition.<\/p>\n