{"id":4128,"date":"2026-10-08T15:36:17","date_gmt":"2026-10-08T15:36:17","guid":{"rendered":"https:\/\/www.tgsteels.com\/plastic-mold-steels\/1-1191-1045\/"},"modified":"2026-10-08T15:36:17","modified_gmt":"2026-10-08T15:36:17","slug":"1-1191-1045","status":"publish","type":"page","link":"https:\/\/www.tgsteels.com\/en\/plastic-mold-steels\/1-1191-1045\/","title":{"rendered":"1730"},"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\/plastic-hero.mp4″ video_webm=”https:\/\/www.tgsteels.com\/wp-content\/uploads\/2025\/09\/plastic-hero.webm” video_ogv=”https:\/\/www.tgsteels.com\/wp-content\/uploads\/2025\/09\/plastic-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

1730 (C45E, C45R, C45U, 1.1191, 1.1201, 1.1730, 1045, 080 M46, S45, XC48 (NF), Ck45 (DIN))<\/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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1730 is an unalloyed steel used for general moulding applications and frames or accessories<\/h4>\n<\/div>\n[\/vc_column_text][vc_column_text css=”” text_direction=”default”]\n
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1730<\/p>\n

    \n
  • is produced by a process that ensures a good level of cleanliness and homogeneity.<\/li>\n
  • is a non alloyed steel with a carbon percentage near 0.45%<\/li>\n
  • can be surface hardened by induction or laser with a hardness up to 57 HRC. The hardened layer will be 2 mm deep in case of induction hardening and 1mm in case of laser hardening.<\/li>\n
  • is delivered at a hardness of 200 HB and can be machined without further heat treatment.<\/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

    1730 can be used for moulding cavities without severe polishing or texturing requirements.<\/p>\n

    1730 can be used for all the secondary parts in molding applications and also frames for plastic moulds.<\/p>\n

    1730 can also be used for mechanical applications requiring a hardness around 200 HB, as hydraulic parts.<\/p>\n<\/div>\n[\/vc_column_text][vc_column_text css=”” text_direction=”default”]\n

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    Main properties<\/h3>\n
      \n
    • Unalloyed steel at 200 HB ready to be machined without any further heat treatment<\/li>\n
    • Suitable for easy moulding cavities.<\/li>\n
    • Excellent thermal conductivity, better than alloyed steels<\/li>\n
    • Good machinability<\/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
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      Chemical composition (typical)<\/em><\/h3>\n<\/div>\n\n\n\n\n\n\n
      C<\/th>\nMn<\/th>\nSi<\/th>\nP<\/th>\nS<\/th>\nCr, Ni<\/th>\nMo<\/th>\nCr+Ni+Mo<\/th>\n<\/tr>\n<\/thead>\n
      0.42<\/td>\n0.60<\/td>\n0.15<\/td>\nMax<\/td>\n0.020<\/td>\nmaxi<\/td>\nmaxi<\/td>\nMax<\/td>\n<\/tr>\n
      0.50<\/td>\n0.80<\/td>\n0.40<\/td>\n0.025<\/td>\n0.035<\/td>\n0.40<\/td>\n0.10<\/td>\n0.63<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n
      \n

      Designation<\/h3>\n<\/div>\n\n\n\n\n\n
      EN – ISO<\/th>\nWerkstoff<\/th>\nUSA<\/th>\nUK<\/th>\nJapan JIS<\/th>\nOther<\/th>\n<\/tr>\n<\/thead>\n
      C45E
      C45R
      C45U<\/td>\n      		1.1191
      1.1201
      1.1730<\/td>\n      		1045<\/td>\n080 M46<\/td>\nS45<\/td>\nXC48 (NF)<\/em>,
      Ck45 (DIN)<\/em><\/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

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

      Annealed for 250 HB max.<\/p>\n

      Typical mechanical properties on normalized steel measured at \u00bc thickness (max 80mm) (results from internal tests not indicated on the certificates)<\/em><\/h3>\n<\/div>\n\n\n\n\n\n\n\n
      Thickness
      mm<\/th>\n      		Tensile strength
      MPa<\/th>\n      		Yield strength 0.2%
      MPa<\/th>\n      		KV impact test +20\u00b0C
      J<\/th>\n<\/tr>\n<\/thead>\n
      \u2264100<\/td>\nMin 580<\/td>\nMin 305<\/td>\nNA<\/td>\n<\/tr>\n
      100<tr\u2264250<\/td>\nMin 560<\/td>\nMin 275<\/td>\nMin 18Long\/10transverse<\/td>\n<\/tr>\n
      \u2265250tr<\/td>\nMin 540<\/td>\nMin 240<\/td>\nMin 15Long\/10tranverse<\/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

      Physical properties<\/h3>\n<\/div>\n\n\n\n\n\n\n\n\n
      Temperature<\/th>\n20\u00b0C<\/th>\n100\u00b0C<\/th>\n200\u00b0C<\/th>\n300\u00b0C<\/th>\n<\/tr>\n<\/thead>\n
      Volumic mass kg\/m\u00b3<\/th>\n7850<\/td>\n7810<\/td>\n7780<\/td>\n7760<\/td>\n<\/tr>\n
      Young Modulus N\/mm\u00b2<\/th>\n205 000<\/td>\n202 000<\/td>\n195 000<\/td>\n190 000<\/td>\n<\/tr>\n
      Thermal conductivity W\/m.K<\/th>\n45<\/td>\n42<\/td>\n39<\/td>\n37<\/td>\n<\/tr>\n
      Coefficient of linear expansion 10-6<\/sup>\/K<\/th>\n11.5<\/td>\n11.8<\/td>\n13<\/td>\n13.2<\/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

      The 1730 is delivered for max 250HB and there is no need for further heat treatment. In the case of mechanical applications it is recommended to use normalized 1730.<\/p>\n

      In case of need (e.g. if other mechanical properties are required)<\/em> the following parameters can be used.<\/p>\n

      Soft annealing<\/h4>\n

      Temperature: 680 – 710\u00b0C, duration 1h + 1h for 25mm thickness. slow cooling in the oven (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 at 550\u00b0C maximum for a minimum of 2 hours, followed by slow cooling in the oven to 450\u00b0C.<\/p>\n

      Normalization<\/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: 450\u00b0C time: 30 s\/mm of thickness<\/li>\n
      • 2nd preheating step: temperature: 650\u00b0C time: 30 s\/mm of thickness<\/li>\n<\/ul>\n

        Recommended normalizing temperature: 840 – 860\u00b0 C. 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 20 minutes per inch of thickness as soon as the temperature of the surface reach the normalization temperature.<\/p>\n

        Then cool the block in air at room temperature out side of the furnace for parts with a small thickness (less than 200mm) and in water mist for bigger parts.<\/p>\n

        Austenitization<\/h4>\n

        In order to avoid any risk of cracking it is recommended to preheat in 1 step.<\/p>\n