High Stength Steel
Characteristics
Tensile Properties
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TRANSVERSE TESTING |
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|---|---|---|---|
| Grade | Yield Strength Rp 0.2 | Tensile Strength Rm | Elongation A5 |
|
S690QL |
700 Mpa min |
780-930 MPa |
14% min |
|
S890QL |
900 Mpa min |
940-1100 MPa |
12% min |
|
S960QL |
960 Mpa min |
980-1150 MPa |
12% min |
IMPACT TOUGHNESS
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Minimum values at |
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|
Grades |
0⁰C |
-20⁰C |
-40⁰C |
|
S690QL |
35J |
30J |
27J |
|
S890QL |
35J |
30J |
27J |
|
S960QL |
35J |
30J |
27J |
Transverse testing according to EN10025 option 30.
Thickness < 12mm subsized charpy V specimen have been used.
CARBON EQUIVALENT
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Carbon equivalent, typical values, % |
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|
Grade |
Plate Thickness |
CEV⁽1⁾ |
CET^(2) |
|
S690QL |
4-15mm |
0.45 |
0.29 |
|
15.01-25mm |
0.44 |
0.30 |
|
|
25.01-40mm |
0.45 |
0.30 |
|
|
40.01-64mm |
0.54 |
0.30 |
|
|
S890QL |
4-35mm |
0.57 |
0.36 |
|
S960QL |
4-30mm |
0.57 |
0.36 |
(1)CEV = C+Mn/6+(Ni+Cu)/15+(Cr+Mo+V)/5
(2)CET = C+(Mn+Mo)/10+Ni/40+(Cr+Cu)/20
Minimum recommended R/t ratio when bending of High Strength Steel Plates
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COLD FORMING |
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Grade |
Thickness (mm) |
Transverse to rolling (R/t) |
Longitudinal to rolling (R/t) |
Trans. Width (W/t) |
Long. Width (W/t) |
|
S690QL |
t < 8.0 |
1.5 |
2.0 |
8 |
9 |
|
8 ≤ t < 20 |
2.0 |
3.0 |
8 |
9 |
|
|
t ≥ 20 |
3.0 |
4.0 |
9 |
10 |
|
|
t < 8.0 |
2.5 |
3.0 |
9 |
10 |
|
|
S890QL |
8 ≤ t < 20 |
3.0 |
4.0 |
9 |
10 |
|
t ≥ 20 |
4.0 |
5.0 |
10 |
12 |
|
|
t < 8.0 |
2.5 |
3.0 |
9 |
10 |
|
|
S960QL |
8 ≤ t < 20 |
3.0 |
4.0 |
9 |
10 |
|
t ≥ 20 |
4.0 |
5.0 |
10 |
12 |
|
R = Recommended punch radius(mm), t = Plate thickness(mm), D = Die opening width(mm)
(Bending angle ≤ 90⁰)
Due to homogenous properties and narrow thickness tolerance available, variations in springback are kept at a low level. Grinding of flame cut or a sheared edge in the bending area is recommended to further prevent cracking during bending.
Applications
High strength steel plates are recommended for following applications:
- Truck chassis
- Lifting and hoisting equipment
- Handling equipment
- Trailers
- Crane booms
- Stabilizing support
- Undercarriage
Delivery Conditions
High strength is delivered as Quenched and Tempered. Supplied as standard as shotblasted and painted condition. In order to maintain a good weld ability and laser cutting performance, a low zinc silicate primer is applied. Plates can also be delivered unpainted.
Ultrasonic Testing
In thickness from 8mm and above, all plates are UT tested and controlled against class S2, E2, according to EN 10160.
Special Steel Includes Cold Work Steel, Hot Work Steel, Plastic Mould Steel, High Speed Steel, High Strength Steel, Abrasion Resistant Steel. These tool materials adhere to great quality demands of steel like temper, strength, toughness, resistance to tempering, hardening capacity, dimensional stability etc. The range of Tool Steel in our store includes products from renowned manufacturers.