{"id":25321,"date":"2026-03-28T21:53:07","date_gmt":"2026-03-28T19:53:07","guid":{"rendered":"https:\/\/www.hardsteel.com.ua\/manufacturer-brands\/acroni\/protac\/"},"modified":"2026-03-28T22:14:44","modified_gmt":"2026-03-28T20:14:44","slug":"protac","status":"publish","type":"page","link":"https:\/\/www.hardsteel.com.ua\/en\/manufacturer-brands\/acroni\/protac\/","title":{"rendered":"PROTAC"},"content":{"rendered":"[vc_row gap=”0″ equal_height=”yes” element_id=”547136″ element_css=”.vc-row-547136 .fixed-container {background-image:url(https:\/\/www.hardsteel.com.ua\/wp-content\/uploads\/2026\/03\/bisnes_car.png);}.vc-row-547136 .curtain-gradient {background:linear-gradient(-55deg, transparent 6%, #005293 20%);}” grid_overlay=”white” fixed_bg=”true” curtain_gradient=”true” css=”.vc_custom_1774724790790{padding-top: 72px !important;padding-bottom: 72px !important;background-color: #212121 !important;background-position: center !important;background-repeat: no-repeat !important;background-size: cover !important;}” curtain_gradient_color=”#005293″ fixed_bg_image=”25296″][vc_column animation_delay=”600″ css_animation=”left-to-right” width=”3\/5″ element_id=”786430″ crp=”480:i:i,480-768:i:i,768-1024:i:i,1024-1280:i:i,1280-1366:i:i,1366-1600:i:i,1600-1920:i:i” offset=”vc_col-lg-6 vc_col-md-6 vc_col-xs-12″]<\/span>
\"Hard<\/div>

PROTAC – Protective steel<\/span><\/span><\/p><\/span>[vc_column_text animation_delay=”0″ css_animation=”none”]PROTAC<\/strong> steel is a high-strength steel designed for demanding protection applications. It provides the optimal combination of strength, hardness and toughness, making it ideal for vehicles and structural components that require exceptional penetration resistance and shock absorption.<\/span><\/span>[\/vc_column_text]<\/span>[vc_row_inner element_id=”310228″ el_id=”button_feedback_product_page”][vc_column_inner]<\/span><\/span><\/span>ORDER A CONSULTATION<\/span><\/a><\/span><\/span><\/span><\/span>GET THE FULL PRICE LIST<\/span><\/a>[\/vc_column_inner][\/vc_row_inner]<\/span>[\/vc_column][vc_column animation_delay=”0″ width=”2\/5″ element_id=”969179″ offset=”vc_col-lg-6 vc_col-md-6 vc_col-xs-12″ crp=”480:i:i,480-768:i:i,768-1024:i:i,1024-1280:i:i,1280-1366:i:i,1366-1600:i:i,1600-1920:i:i”][\/vc_column][\/vc_row][vc_row element_id=”327062″ css=”.vc_custom_1548503959352{padding-top: 96px !important;padding-bottom: 96px !important;background-color: #f5f5f5 !important;}”][vc_column]

Each brand is characterized by the letters SI, a middle name and three dots. The letters SI come from the group name SIJ, thus combining them. The three dots represent our three values. The middle brand name describes the properties of each group of steel and products bearing the brand name.<\/blockquote>
SIJ | ACRONI<\/h5>THE POWER OF BRANDS<\/span><\/div><\/div><\/div>[vc_empty_space][vc_row_inner gap=”32″ element_id=”900256″][vc_column_inner width=”1\/2″]

PROTAC – Protective steel<\/span><\/span><\/h2>[vc_empty_space height=”12px”][vc_column_text animation_delay=”200″ css_animation=”bottom-to-top”]PROTAC protective steel is a high-strength steel designed for protective applications. It offers a unique balance of high strength, elongation and impact toughness even at low operating temperatures. PROTAC protective grades meet the requirements of STANAG 4569 (AEP-55), VPAM PM 2007 and other relevant standards. Vehicles and structures made from this steel provide a high level of protection.<\/span><\/span>[\/vc_column_text][\/vc_column_inner][vc_column_inner width=”1\/2″]

PROTAC – Deep drawing steel<\/span><\/span><\/h2>[vc_empty_space height=”12px”][vc_column_text animation_delay=”200″ css_animation=”bottom-to-top”]PROTAC deep drawing steel is a non-alloy steel designed for cold forming. It has excellent formability, weldability and strength. Its fine grain structure and balanced mechanical properties make it a reliable choice for construction and engineering.<\/span><\/span>[\/vc_column_text][\/vc_column_inner][\/vc_row_inner][vc_empty_space][\/vc_column][\/vc_row][vc_row gap=”0″ element_id=”370528″ grid_overlay=”black” css=”.vc_custom_1667339244230{padding-top: 72px !important;background-position: center !important;background-repeat: no-repeat !important;background-size: contain !important;}” el_class=”vc_row.background-cover-767 vc_row.background-cover-768-1024 content-box-padding”][vc_column animation_delay=”0″ element_id=”456489″ crp=”480:i:i,480-768:i:i,768-1024:20:20,1024-1280:i:i,1280-1366:i:i,1366-1600:i:i,1600-1920:i:i”]

Hard Steel ind.<\/span><\/span><\/p>

PRODUCT<\/span><\/span><\/h2>[vc_empty_space][\/vc_column][\/vc_row][vc_row full_width=”stretch_row_content” gap=”0″ equal_height=”yes” content_placement=”middle” element_id=”598021″ grid_overlay=”black” css=”.vc_custom_1667339211486{background-color: #ffffff !important;background-position: center !important;background-repeat: no-repeat !important;background-size: contain !important;}” el_class=”background-cover-767″][vc_column animation_delay=”0″ element_id=”87996″ offset=”vc_col-lg-6 vc_col-md-12 vc_col-xs-12″ crp=”480:5:5,480-768:5:5,768-1024:10:10,1024-1280:i:i,1280-1366:5:5,1366-1600:10:10,1600-1920:15:15″ css=”.vc_custom_1667339157102{padding-right: 180px !important;padding-left: 180px !important;background-position: 0 0 !important;background-repeat: no-repeat !important;}” el_class=”background-position-left-bottom”]<\/span>

Steel 430<\/span><\/span><\/span><\/h3>[vc_column_text animation_delay=”200″ css_animation=”bottom-to-top”]PROTAC 430 is a high-strength and hard steel used for protective purposes. These steel sheets exhibit excellent welding and bending properties due to a unique balance between high strength, elongation and impact toughness, even at low operating temperatures. Vehicles and structures made from PROTAC 430 provide a high level of protection.<\/span><\/span>[\/vc_column_text]<\/span>[vc_column_text animation_delay=”0″]\n

Properties<\/h4>\n
Hardness<\/span>[HB]:<\/span>420 - 480<\/span>\r\nR\u209a\u2080.\u2082<\/span>[MPa]:<\/span>1100<\/span>\r\nR\u2098<\/span>[MPa]:<\/span>1250<\/span>\r\nA\u2085.\u2086\u2085<\/span>[%]:<\/span>8.0<\/span>\r\nKV\u2082, -20 \u00b0C<\/span>[J]:<\/span>20\r\n<\/span><\/pre>\n
Chemical composition
\nIn weight %<\/span><\/h4>\n\n\n\n\n
C<\/td>\nSi<\/td>\nMn<\/td>\nP<\/td>\nS<\/td>\nCr<\/td>\nNi<\/td>\nMo<\/td>\nB<\/td>\nCEV<\/td>\n<\/tr>\n
0.30<\/td>\n\u00a01.20<\/td>\n1.00<\/td>\n0.02<\/td>\n0.004<\/td>\n0.90<\/td>\n\u00a01.30<\/td>\n0.50<\/td>\n0.004<\/td>\n0.70<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n[\/vc_column_text]<\/span>[vc_empty_space][\/vc_column][vc_column animation_delay=”0″ element_id=”630311″ offset=”vc_col-lg-6 vc_col-md-12 vc_col-xs-12″ crp=”480:5:5,480-768:5:5,768-1024:10:10,1024-1280:i:i,1280-1366:5:5,1366-1600:10:10,1600-1920:15:15″ css=”.vc_custom_1667339223411{padding-right: 180px !important;padding-left: 180px !important;}”]
Steel 500<\/span><\/span><\/span><\/h3>[vc_column_text animation_delay=”200″ css_animation=”bottom-to-top”]PROTAC 500 is a high-strength and hard steel used for protective purposes. These steel sheets exhibit excellent welding and bending properties due to a unique balance between high strength, elongation and impact toughness, even at low operating temperatures. Protective components made from PROTAC 500 meet the requirements of STANAG 4569 AEP55, VPAM-PM 2007 and other relevant standards. Vehicles and structures made from this steel provide a high level of protection.<\/span><\/span>[\/vc_column_text]<\/span>[vc_column_text animation_delay=”0″]\n
Properties<\/h4>\n
Hardness<\/span>[HB]:<\/span>480 - 530<\/span>\r\nR\u209a\u2080.\u2082<\/span>[MPa]:<\/span>1200<\/span>\r\nR\u2098<\/span>[MPa]:<\/span>1600<\/span>\r\nA\u2085.\u2086\u2085<\/span>[%]:7<\/span>.5<\/span>\r\nKV\u2082, -20 \u00b0C<\/span>[J]:<\/span>20\r\n<\/span><\/pre>\n
Chemical composition
\nIn weight %<\/span><\/h4>\n\n\n\n\n
C<\/td>\nSi<\/td>\nMn<\/td>\nP<\/td>\nS<\/td>\nCr<\/td>\nNi<\/td>\nMo<\/td>\nB<\/td>\nCEV<\/td>\n<\/tr>\n
0.30<\/td>\n\u00a01.00<\/td>\n0.90<\/td>\n0.01<\/td>\n0.004<\/td>\n0.80<\/td>\n\u00a01.00<\/td>\n0.40<\/td>\n0.004<\/td>\n0.68<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n[\/vc_column_text]<\/span>[vc_empty_space][\/vc_column][\/vc_row][vc_row full_width=”stretch_row_content” gap=”0″ equal_height=”yes” content_placement=”middle” element_id=”757679″ grid_overlay=”black” css=”.vc_custom_1774726046920{margin-top: 40px !important;background-color: #ffffff !important;background-position: center !important;background-repeat: no-repeat !important;background-size: contain !important;}” el_class=”background-cover-767″][vc_column animation_delay=”0″ element_id=”87996″ offset=”vc_col-lg-6 vc_col-md-12 vc_col-xs-12″ crp=”480:5:5,480-768:5:5,768-1024:10:10,1024-1280:i:i,1280-1366:5:5,1366-1600:10:10,1600-1920:15:15″ css=”.vc_custom_1667339157102{padding-right: 180px !important;padding-left: 180px !important;background-position: 0 0 !important;background-repeat: no-repeat !important;}” el_class=”background-position-left-bottom”]<\/span>
Steel 550<\/span><\/span><\/span><\/h3>[vc_column_text animation_delay=”200″ css_animation=”bottom-to-top”]PROTAC 550 is a high-strength and hard steel used as an additional plate for protective applications. These steel plates exhibit excellent welding and cutting properties due to a unique balance between high strength, elongation and impact toughness, even at low operating temperatures. Protective components made from PROTAC 550 meet the requirements of STANAG 4569 AEP55, VPAM-PM 2007 and other relevant standards. Vehicles and structures made from this steel provide a high level of protection.<\/span><\/span>[\/vc_column_text]<\/span>[vc_column_text animation_delay=”0″]\n
Properties<\/h4>\n
Hardness<\/span>[HB]:510<\/span> - 560<\/span>\r\nR\u209a\u2080.\u2082<\/span>[MPa]:<\/span>1300<\/span>\r\nR\u2098<\/span>[MPa]:<\/span>1800<\/span>\r\nA\u2085.\u2086\u2085<\/span>[%]:7<\/span>.0<\/span>\r\nKV\u2082, -20 \u00b0C<\/span>[J]:<\/span>20\r\n<\/span><\/pre>\n
Chemical composition
\nIn weight %<\/span><\/h4>\n\n\n\n\n
C<\/td>\nSi<\/td>\nMn<\/td>\nP<\/td>\nS<\/td>\nCr<\/td>\nNi<\/td>\nMo<\/td>\nB<\/td>\nCEV<\/td>\n<\/tr>\n
0.43<\/td>\n\u00a00.80<\/td>\n0.60<\/td>\n0.01<\/td>\n0.003<\/td>\n1.20<\/td>\n\u00a01.20<\/td>\n0.50<\/td>\n0.004<\/td>\n0.84<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n[\/vc_column_text]<\/span>[vc_empty_space][\/vc_column][vc_column animation_delay=”0″ element_id=”630311″ offset=”vc_col-lg-6 vc_col-md-12 vc_col-xs-12″ crp=”480:5:5,480-768:5:5,768-1024:10:10,1024-1280:i:i,1280-1366:5:5,1366-1600:10:10,1600-1920:15:15″ css=”.vc_custom_1667339223411{padding-right: 180px !important;padding-left: 180px !important;}”]
Steel 600<\/span><\/span><\/span><\/h3>[vc_column_text animation_delay=”200″ css_animation=”bottom-to-top”]PROTAC 600 is a high-strength and hard steel used as an additional plate for protective applications. These steel plates exhibit excellent welding and cutting properties due to a unique balance between high strength, elongation and impact toughness, even at low operating temperatures. Protective components made from PROTAC 600 meet the requirements of STANAG 4569 AEP55, VPAM-PM 2007 and other relevant standards. Vehicles and structures made from this steel provide a high level of protection.<\/span><\/span>[\/vc_column_text]<\/span>[vc_column_text animation_delay=”0″]\n
Properties<\/h4>\n
Hardness<\/span>[HB]:57<\/span>0 - 650<\/span>\r\nR\u209a\u2080.\u2082<\/span>[MPa]:<\/span>1500<\/span>\r\nR\u2098<\/span>[MPa]:<\/span>1800<\/span>\r\nA\u2085.\u2086\u2085<\/span>[%]:7<\/span>.0<\/span>\r\nKV\u2082, -20 \u00b0C<\/span>[J]:<\/span>20\r\n<\/span><\/pre>\n
Chemical composition
\nIn weight %<\/span><\/h4>\n\n\n\n\n
C<\/td>\nSi<\/td>\nMn<\/td>\nP<\/td>\nS<\/td>\nCr<\/td>\nNi<\/td>\nMo<\/td>\nB<\/td>\nCEV<\/td>\n<\/tr>\n
0.47<\/td>\n\u00a01.00<\/td>\n0.80<\/td>\n0.01<\/td>\n0.003<\/td>\n1.30<\/td>\n\u00a01.30<\/td>\n0.50<\/td>\n0.004<\/td>\n0.86<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n[\/vc_column_text]<\/span>[vc_empty_space][\/vc_column][\/vc_row][vc_row full_width=”stretch_row_content” gap=”0″ equal_height=”yes” content_placement=”middle” element_id=”187449″ grid_overlay=”black” css=”.vc_custom_1774726051914{margin-top: 40px !important;background-color: #ffffff !important;background-position: center !important;background-repeat: no-repeat !important;background-size: contain !important;}” el_class=”background-cover-767″][vc_column animation_delay=”0″ element_id=”87996″ offset=”vc_col-lg-6 vc_col-md-12 vc_col-xs-12″ crp=”480:5:5,480-768:5:5,768-1024:10:10,1024-1280:i:i,1280-1366:5:5,1366-1600:10:10,1600-1920:15:15″ css=”.vc_custom_1667339157102{padding-right: 180px !important;padding-left: 180px !important;background-position: 0 0 !important;background-repeat: no-repeat !important;}” el_class=”background-position-left-bottom”]
Steel 650<\/span><\/span><\/span><\/h3><\/span>[vc_column_text animation_delay=”200″ css_animation=”bottom-to-top”]PROTAC 650 is a high-strength and hard steel used as an additional plate for protective applications. These steel plates exhibit excellent welding and cutting properties due to a unique balance between high strength, elongation and impact toughness, even at low operating temperatures. Protective components made from PROTAC 650 meet the requirements of STANAG 4569 AEP55, VPAM-PM 2007 and other relevant standards. Vehicles and structures made from this steel provide a high level of protection.<\/span><\/span>[\/vc_column_text]<\/span>[vc_column_text animation_delay=”0″]\n
Properties<\/h4>\n
Hardness<\/span>[HB]:65<\/span>0 - 680<\/span>\r\nR\u209a\u2080.\u2082<\/span>[MPa]:<\/span>1650<\/span>\r\nR\u2098<\/span>[MPa]:200<\/span>0<\/span>\r\nA\u2085.\u2086\u2085<\/span>[%]:5<\/span>.0<\/span>\r\nKV\u2082, -20 \u00b0C<\/span>[J]:1<\/span>0\r\n<\/span><\/pre>\n
Chemical composition
\nIn weight %<\/span><\/h4>\n\n\n\n\n
C<\/td>\nSi<\/td>\nMn<\/td>\nP<\/td>\nS<\/td>\nCr<\/td>\nNi<\/td>\nMo<\/td>\nB<\/td>\nCEV<\/td>\n<\/tr>\n
0.48<\/td>\n\u00a01.00<\/td>\n0.80<\/td>\n0.01<\/td>\n0.003<\/td>\n1.30<\/td>\n\u00a01.30<\/td>\n0.50<\/td>\n0.004<\/td>\n0.88<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n[\/vc_column_text]<\/span>[vc_empty_space][\/vc_column][vc_column animation_delay=”0″ element_id=”630311″ offset=”vc_col-lg-6 vc_col-md-12 vc_col-xs-12″ crp=”480:5:5,480-768:5:5,768-1024:10:10,1024-1280:i:i,1280-1366:5:5,1366-1600:10:10,1600-1920:15:15″ css=”.vc_custom_1667339223411{padding-right: 180px !important;padding-left: 180px !important;}”]
Steel DD11 Mod<\/span><\/span><\/span><\/h3><\/span>[vc_column_text animation_delay=”200″ css_animation=”bottom-to-top”]PROTAC DD11 Mod is a modification of the mild steel DD11 for cold forming. The steel plate is hot rolled and heat treated to obtain a fine-grained microstructure, specified mechanical properties for deep drawing and good resistance to aging. The special properties in the quenched and annealed condition make this steel grade ideal for demanding applications such as the production of sleeves.<\/span><\/span>[\/vc_column_text]<\/span>[vc_column_text animation_delay=”0″]\n
Properties<\/h4>\n
R\u2098<\/span>[MPa]:<\/span>300<\/span>\r\nA\u2085.\u2086\u2085<\/span>[%]:35<\/span>.0<\/span>\r\nKV\u2082, -20 \u00b0C<\/span>[J]:100<\/span>\r\n<\/pre>\n
Chemical composition
\nIn weight %<\/span><\/h4>\n\n\n\n\n
C<\/td>\nSi<\/td>\nMn<\/td>\nP<\/td>\nS<\/td>\nCr<\/td>\nNi<\/td>\nAi<\/td>\nCu<\/td>\n<\/tr>\n
0.13<\/td>\n\u00a00. 13<\/td>\n0.50<\/td>\n0.02<\/td>\n0.005<\/td>\n0.20<\/td>\n\u00a00.15<\/td>\n0.07<\/td>\n0.07<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n[\/vc_column_text]<\/span>[vc_empty_space][\/vc_column][\/vc_row][vc_row element_id=”447925″ css=”.vc_custom_1547283354908{padding-top: 96px !important;}”][vc_column animation_delay=”0″ text_align=”center” element_id=”643897″ crp=”480:i:i,480-768:i:i,768-1024:i:i,1024-1280:i:i,1280-1366:i:i,1366-1600:i:i,1600-1920:i:i”]<\/span><\/span><\/span>To ACRONI<\/span><\/a>
<\/div><\/span><\/span><\/span>Go to order<\/span><\/a><\/span>[\/vc_column][\/vc_row]\n","protected":false},"excerpt":{"rendered":"
[vc_row gap=”0″ equal_height=”yes” element_id=”547136″ element_css=”.vc-row-547136 .fixed-container {background-image:url(https:\/\/www.hardsteel.com.ua\/wp-content\/uploads\/2026\/03\/bisnes_car.png);}.vc-row-547136 .curtain-gradient {background:linear-gradient(-55deg, transparent 6%, #005293 20%);}” grid_overlay=”white” fixed_bg=”true” curtain_gradient=”true” css=”.vc_custom_1774724790790{padding-top: 72px !important;padding-bottom: 72px !important;background-color: #212121 !important;background-position: center !important;background-repeat: no-repeat !important;background-size: cover !important;}” curtain_gradient_color=”#005293″ fixed_bg_image=”25296″][vc_column animation_delay=”600″ css_animation=”left-to-right” width=”3\/5″ element_id=”786430″ crp=”480:i:i,480-768:i:i,768-1024:i:i,1024-1280:i:i,1280-1366:i:i,1366-1600:i:i,1600-1920:i:i” offset=”vc_col-lg-6 vc_col-md-6 vc_col-xs-12″][vc_column_text animation_delay=”0″ css_animation=”none”][\/vc_column_text][vc_row_inner element_id=”310228″ el_id=”button_feedback_product_page”][vc_column_inner][\/vc_column_inner][\/vc_row_inner][\/vc_column][vc_column animation_delay=”0″ width=”2\/5″ element_id=”969179″ offset=”vc_col-lg-6 vc_col-md-6 vc_col-xs-12″ crp=”480:i:i,480-768:i:i,768-1024:i:i,1024-1280:i:i,1280-1366:i:i,1366-1600:i:i,1600-1920:i:i”][\/vc_column][\/vc_row][vc_row element_id=”327062″ css=”.vc_custom_1548503959352{padding-top: 96px !important;padding-bottom: 96px […]<\/p>\n","protected":false},"author":1,"featured_media":0,"parent":22228,"menu_order":0,"comment_status":"closed","ping_status":"closed","template":"page-vc.php","meta":[],"yoast_head":"\nPROTAC | Hard Steel Ind.<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.hardsteel.com.ua\/en\/manufacturer-brands\/acroni\/protac\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" 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