PROTAC

Hard Steel Ind.

PROTAC – Protective steel

PROTAC 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.

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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.
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PROTAC – Protective steel

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.

PROTAC – Deep drawing steel

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.

Hard Steel ind.

PRODUCT

Steel 430

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.

Properties

Hardness[HB]:420 - 480
Rₚ₀.₂[MPa]:1100
Rₘ[MPa]:1250
A₅.₆₅[%]:8.0
KV₂, -20 °C[J]:20

Chemical composition
In weight %

C Si Mn P S Cr Ni Mo B CEV
0.30  1.20 1.00 0.02 0.004 0.90  1.30 0.50 0.004 0.70

Steel 500

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.

Properties

Hardness[HB]:480 - 530
Rₚ₀.₂[MPa]:1200
Rₘ[MPa]:1600
A₅.₆₅[%]:7.5
KV₂, -20 °C[J]:20

Chemical composition
In weight %

C Si Mn P S Cr Ni Mo B CEV
0.30  1.00 0.90 0.01 0.004 0.80  1.00 0.40 0.004 0.68

Steel 550

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.

Properties

Hardness[HB]:510 - 560
Rₚ₀.₂[MPa]:1300
Rₘ[MPa]:1800
A₅.₆₅[%]:7.0
KV₂, -20 °C[J]:20

Chemical composition
In weight %

C Si Mn P S Cr Ni Mo B CEV
0.43  0.80 0.60 0.01 0.003 1.20  1.20 0.50 0.004 0.84

Steel 600

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.

Properties

Hardness[HB]:570 - 650
Rₚ₀.₂[MPa]:1500
Rₘ[MPa]:1800
A₅.₆₅[%]:7.0
KV₂, -20 °C[J]:20

Chemical composition
In weight %

C Si Mn P S Cr Ni Mo B CEV
0.47  1.00 0.80 0.01 0.003 1.30  1.30 0.50 0.004 0.86

Steel 650

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.

Properties

Hardness[HB]:650 - 680
Rₚ₀.₂[MPa]:1650
Rₘ[MPa]:2000
A₅.₆₅[%]:5.0
KV₂, -20 °C[J]:10

Chemical composition
In weight %

C Si Mn P S Cr Ni Mo B CEV
0.48  1.00 0.80 0.01 0.003 1.30  1.30 0.50 0.004 0.88

Steel DD11 Mod

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.

Properties

Rₘ[MPa]:300
A₅.₆₅[%]:35.0
KV₂, -20 °C[J]:100

Chemical composition
In weight %

C Si Mn P S Cr Ni Ai Cu
0.13  0. 13 0.50 0.02 0.005 0.20  0.15 0.07 0.07
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