Hardox® wear plate

TOP 5 REASONS TO CHOOSE HARDOX® WEAR PLATE

  1. CONSISTENT PROPERTIES

    Every Hardox® plate, every direction, every time.
    No other plate has the same consistent hardness, toughness, thickness, chemical properties and workshop friendliness.

  2. CLEAN STEEL

    Hardox® wear plate is entirely built up with a martensitic matrix. Perfect random orientation and small grain size, high purity and low amount of inclusions for guaranteed toughness, at low temperatures.

  3. LASTING VALUE

    Hardox® is the strongest product brand for wear-resistant steel in the world. More than 40 years as a global market and innovation leader has created a unique position.
    Equipment produced with Hardox® wear plate has a higher value.

  4. CRACK RESISTANCE

    The clean steel practice results in a very high crack resistance, resistance to impact, and exceptionally high-energy absorption.

  5. GLOBAL AND VERSATILE

    Hardox® is the true global wear plate. It is available in stock on all continents and in more than 50 countries.
    From 0.7 mm thin to 160 mm thick.
    From the super-tough Hardox® HiTuf to Hardox® Extreme, the hardest wear plate in the world.

*The relative service life intervals are valid for sliding wear only. **Typical for 70 mm.


Mechanical Properties

Hardox® grade Hardness nominal HBW Impact toughness CVL typical for 20 mm J at‑40°C Relative service life interval* CEV/CET typical for 20 mm Thickness range mm
*The relative service life intervals are valid for sliding wear only. **Typical for 70 mm
Hardox® HiTuf 350 95 J 0.55/0.36 40-160 mm
Hardox® 400 400 45 J 1 0.44/0.28 44-130 mm
Hardox® 450 450 50 J 1.1-1.5 0.56/0.38 3.2-130 mm
Hardox® 500 500 37 J 1.3-2.1 0.63/0.41 4-103 mm
Hardox® 500 Tuf 475-505 45 J 1.3-2.1 0.52/0.36 4-25.4 mm
Hardox® 550 550 30 J 1.5-4.0 0.72/0.48 8-65 mm
Hardox® 600 600 20 J 1.8-8.0 0.76/0.58 6-65 mm
Hardox® Extreme 650-700 <15 J 2.0-10.0 0.65/0.54 8-19 mm
Hardox® HiTemp 350-400 60 J 0.59/0.40 5-59 mm

Hardox® Dimensions

Hardox dimensions chart

Hardox® Wear sheet

Hardox® grade Hardness nominal HBW Impact toughness CVL typical for 20 mm J at‑40°C Relative service life interval CEV/CET typical Thickness range mm
Hardox® 400 400 45 J 1 0.48/0.30 2.0-8.0 mm
Hardox® 450 450 50 J 1.1-1.5 0.52/0.35 2.0-8.0 mm
Hardox® 450 CR 450 0.39/0.31 0.7-2.1 mm
Hardox® 500 500 37 J 1.3-2.1 0.55/0.40 2.0-6.5 mm

Hardox® Round bar

Hardox® grade Hardness nominal HBW Impact toughness CVL typical for 20 mm J at‑40°C CEV/CET typical for 20 mm Bar diameter mm
Hardox® 400 Bar 400 45 J 0.58/0.37 40-100 mm

Hardox® Tubes

Hardox® grade Hardness nominal HBW Yield strength typical MPa Diameter external mm Wall thickness mm
Hardox® 400 400 1000-1300 76.1-219.1 3.0-6.0 mm
Hardox® 500 500 >1200 76.1-133 3.0-6.0 mm

Welding

Recommended maximum heat input for Hardox

Recommended maximum heat input for Hardox

Excessive heat input increases the width of the heat affected zone (HAZ), which in turn impairs the mechanical proprieties as well as the wear resistance of the HAZ. Welding with low heat input provides benefits like these:

  • Increased wear resistance of the HAZ.
  • Decreased distortion (single-pass welded joints).
  • Increased toughness of the joint.
  • Increased strength of the joint.

Hardox® wear plates are carbon steels and their weldability is good. Due to high strength and hardness, they require correct treatment:

  • They can be welded with all common welding methods;
  • It is recommended to use soft welding consumables;
  • Heat input should be as low as possible;
  • Depending on thickness, it is recommended to use suitable preheating temperature;
  • In special welding condition when preheating cannot be performed or welding has to be done outside it is recommended to use stainless consumables.

Recommended stainless consumables for Hardox® wear plate.

Welding metod AWS classification EN classification
Note: X = stands for one or more characters
MAG/GMAW,
solid wire
AWS A5.28 ER70X-X EN ISO 14341-A- G 38x
AWS A5.28 ER80X-X EN ISO 14341-A- G 42x
MAG/MCAW,
metal cored wire
AWS A5.28 E7XC-X EN ISO 17632-A- T 42xH5
AWS A5.28 E8XC-X EN ISO 17632-A- T 46xH5
MAG/FCAW,
flux cored wire
AWS A5.29 E7XT-X EN ISO 17632-A- T 42xH5
AWS A5.29 E8XT-X EN ISO 17632-A- T 46xH5
MMA
(SMAW, stick)
AWS A5.5 E70X EN ISO 2560-A- E 42xH5
AWS A5.5 E80X EN ISO 2560-A- E 46xH5
SAW AWS A5.23 F49X EN ISO 14171-A- S 42x
AWS A5.23 F55X EN ISO 14171-A- S 46x
TIG/GTAW AWS A5.18 ER70X EN ISO 636-A- W 42x
AWS A5.28 ER80X EN ISO 636-A- W 46x

Recommended preheating temperatures

The single plate thickness in millimeters is show on the X-axis. Minimum recommended preheat and interpass temperatures for different single plate thicknesses (mm).

Hardox Recommended preheating temperatures chart


Maximum recommended interpass temperature/preheating temperature

* Interpass temperatures of up to approx. 400°C can be used in certain cases for Hardox® HiTuf. In such cases, use WeldCalc.
Hardox® HiTemp 300°C
Hardox® HiTuf* 300°C
Hardox® 400 225°C
Hardox® Tube 400 225°C
Hardox® 450 225°C
Hardox® 500 225°C
Hardox® Tube 500 225°C
Hardox® 500 Tuf 225°C
Hardox® 550 225°C
Hardox® 600 225°C
Hardox® Extreme 100°C
  • The recommended preheating temperatures are applicable for heat inputs of 1.7 kJ/mm or higher. If heat inputs of 1.0 - 1.69 kJ/mm are used, we recommend that you increase the temperature by 25°C above the recommended preheating temperature.
  • If a lower heat input than 1.0 kJ/mm is applied, we recommend that you use SSAB's WeldCalc software to calculate the recommended minimum preheating temperature.
  • If the ambient humidity is high or the temperature is below 5°C, the lowest recommended preheating temperatures should be increased by 25°C.


Hardox welding


Bending

Minimum recommended punch radius (R) and de opening width (W) for plate thickness (t) when the plate is bent 90° along the direction of rolling and transverse to the rolling direction.

Material Thickness (t) (mm) Transverse to rolling direction
Minimum R/t
Along rolling direction R/t
Minimum R/t
Die opening width (W)
Minimum W/t
Care should be taken during all bending due to the high strength of the plate and high bending force needed. If the plate should crack, fragments of the material may fly off. During bending, the operator and personnel must not stand in front of the machine - they should move to the side.
Hot rolled plate
Hardox® 400 t < 8
8 ≤ t < 20
20 ≤ t < 50
2.5
3.0
4.0
3.0
4.0
5.0
12
14
16
Hardox® 450 t < 8
8 ≤ t < 20
≥ 20
3.0
3.5
4.5
3.5
4.5
5.0
12
14
16
Hardox® 500 t < 8
8 ≤ t < 15
15 ≤ t < 20
≥ 20
3.5
4.0
4.5
5.5
4.5
4.5
5.0
6.0
14
14
16
18
Hardox® 500 Tuf t < 8
8 ≤ t < 20
≥ 20
3.0
3.5
4.5
3.5
4.5
5.0
12
14
16
Hot rolled strip
Hardox® 400 2 ≤ t < 4
4 ≤ t ≤ 8
3.0
3.0
4.0
3.5
12
12
Hardox® 450 2.5 ≤ t < 4
4 ≤ t ≤ 8
3.0
3.0
4.0
3.5
12
12
Hardox® 500 3 ≤ t ≤ 6.5 3.5 4.0 14

Cutting

Risk prevention

All major cutting methods can be used for cutting high-strength steels.

Risks: 1) Cut edge cracking. 2) Softening of small cut parts.

The best way to prevent cut edge cracking is to apply preheating for oxy-fuel and plasma cutting, according to the table below. During laser cutting no preheating is required. To prevent overall loss of hardness, thermal cutting small parts should be performed under water. To eliminate the risk of softening and cut edge cracking, cold cutting meethods should be applied - like abrasive water jet cutting.

Preheat temperatures for oxy-fuel cutting of Hardox® wear plate.

Grade Plate thickness [mm] Minimum preheating temp. (°C) Maximum preheating temp. (°C)
SSAB recommends AWJ cutting. If only oxy-fuel cutting is available follow the recommendations in the table above.
Hardox® HiTemp 5-51 mm No preheating 500
Hardox® HiTuf < 90 mm
≥ 90 mm
No preheating
100
300
Hardox® 400 < 45 mm
45-59.9 mm
60-80 mm
> 80 mm
No preheating
100
150
175
225
Hardox® 450 < 40 mm
40-49.9 mm
50-69.9 mm
≥ 70 mm
No preheating
100
150
175
225
Hardox® 500 /
Hardox® 500 Tuf
< 25 mm
25-49.9 mm
50-59.9 mm
≥ 60 mm
No preheating
100
150
175
225
Hardox® 550 < 20 mm
20-51 mm
> 51 mm
No preheating
150
170
200
Hardox® 600 < 12 mm
12-65 mm
No preheating
175
180
Hardox® Extreme* 8-19 mm 100 180

Maximum cutting speed (mm/min) for oxy-fuel cutting without pre-heating

Max plate thickness Hardox® HiTemp Hardox® HiTuf Hardox® 400 Hardox® 450 Hardox® 500 Hardox® 550 Hardox® 600 Hardox® Extreme
*Only preheating is applicable. **SSAB recommends AWJ cutting.
12 mm no restriction **
15 mm no restriction 300 **
20 mm no restriction 200 **
25 mm no restriction 300 270 180
30 mm no restriction 250 230 150
35 mm no restriction 230 190 140
40 mm no restriction 230 200 160 130
45 mm no res­triction 230 230 200 170 140 120
50 mm no res­triction 210 210 180 150 130 110
60 mm 200 200 170 140 * *
70 mm 190 190 160 135 * *
80 mm 180 180 150 130
< 80 mm * * * *

Machining

Drilling can be done with HSS with 8% Co drills, but for better productivity, tungsten carbide tip drills are recommended. Cement carbide tips for drilling should be in class P20, coated with hard CVD layer. Drilling machine should be stable and robust. Attachments should keep drilled part without any vibrations, in order to perform process seamlessly. It is recommended to use coolant for every drilling with coolant mix 8 – 10 %.

Hardox® HiTuf Hardox® 400 Hardox® 450 Hardox® 500
Vc (m/mm) -12 -9 -7 -5
Drill Ø Feed rate, fn (mm/rev) and speed (rpm)
5 0.07/760 0.06/570 0.05/445 0.04/280
10 0.10/380 0.11/290 0.10/225 0.08/140
15 0.16/250 0.16/190 0.15/150 0.12/95
20 0.23/190 0.23/140 0.20/110 0.16/70
25 0.29/150 0.29/115 0.25/90 0.20/55
30 0.35/125 0.35/95 0.30/75 0.24/45

Calculate your savings with Hardox® Wearcalc

Hardox® WearCalc helps users compare different Hardox® grades for their particular application and calculate the increase in service life and payload when upgrading from mild steel to high-strength steel. The app can also be used to predict erosion wear, sliding wear and impact wear.


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