Quend 700
Extra High Strength Structural Steel (High Yield Strength)1 Steel description and applications
Quend 700 is an extra high strength structural steel produced as quenched and tempered with a minimum yield strength of 700 MPa. It complies with EN 10025-6 S690QL standard with a guaranteed impact toughness of 27 J at −40°C.Applications
- Truck chassis
- Lifting and hoisting equipment
- Handling equipment
- Trailers
2 Technical characteristics
Tensile properties (Transverse testing)
| Yield Strength Rp0.2 | Tensile Strength Rm | Elongation |
|---|---|---|
| 700 MPa min | 780 – 930 MPa | 14% min |
Impact toughness (Charpy V, transverse)
| 0 °C | −20 °C | −40 °C |
|---|---|---|
| 35 J | 30 J | 27 J |
3 Dimensions
- Thickness: 4 – 64 mm
- Width: 1500 – 3100 mm
4 Flatness, tolerances & surface properties
- Flatness EN 10029: Class N (standard), Class S PLUS
- Thickness tolerance: meets & exceeds EN 10029 Class A
- Shape, length, width tolerances: EN 10029
- Surface properties: EN 10163-2 Class B3 PLUS
5 Chemical composition (max %)
| C | Si | Mn | P | S | Cr | Ni | Mo | Cu | Nb | V | Ti | Al | N | B |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 0.20 | 0.60 | 1.50 | 0.020 | 0.010 | 0.60 | 0.070 | 1.00 | 0.070 | 0.040 | 0.070 | 0.040 | 0.050 | 0.014 | 0.005 |
Carbon equivalent (typical)
| Thickness | CEV | CET |
|---|---|---|
| 4 – 15 mm | 0.45 | 0.29 |
| 15.01 – 25 mm | 0.44 | 0.30 |
| 25.01 – 40 mm | 0.45 | 0.30 |
| 40.01 – 64 mm | 0.54 | 0.33 |
6 Delivery conditions & heat treatment
Delivered quenched and tempered. Standard: shot-blasted and painted with low zinc silicate primer. Plates can also be supplied unpainted.Do not use in hot working or service temperatures above 550 °C to preserve guaranteed properties.
7 Ultrasonic testing
All plates ≥ 8 mm are UT tested according to EN 10160, class S2, E2, to detect inclusions, cracks, and porosity.8 Processing recommendations
Thermal cutting
Can be cut by oxy-fuel, plasma, or laser. Allow slow cooling to room temperature; never accelerate cooling.Cold forming
Suited for cold forming. Complies with S690QL bending requirements with closer R/t ratios. Grind edges in bending area to prevent cracking.Welding
Suitable for all conventional methods. Preheating generally not needed up to 30 mm if heat input ≤ 1.7 kJ/mm. Use low hydrogen electrodes. Weld at ≥ +5 °C and allow slow cooling.Machining
Good machinability: drilling, countersinking, and milling like other 700 MPa Q&T steels.Minimum recommended R/t ratio when bending
| Thickness | Transverse (R/t) | Longitudinal (R/t) | Trans. Width (W/t) | Long. Width (W/t) |
|---|---|---|---|---|
| t < 8 mm | 1.5 | 2.0 | 8 | 9 |
| 8 ≤ t < 20 | 2.0 | 3.0 | 8 | — |
| t ≥ 20 mm | 3.0 | 4.0 | 9 | 10 |