1.7020
2020-05-16 17:00:33 Origin： Remark：0 Click：
Hardened and tempered steel 1.7020 Round bar, Flat bar, Plate, Rod 1.7020 Ex-stock Steelmaking, Hot forging, Hot rolling, Heat treatment
MATERIAL DESIGNATION - W-Nr 1.7020
MATERIAL CATEGORY: hardened and tempered steel
PRODUCT DESCRIPTION
Alloy structural steel is provided with higher yield strength, tensile strength, endurance strength, yield ratio (about 0.85 generally ) enough plasticity and toughness.
The concentration of alloy element of this kind of steel is quite high, mainly are corrosion resistant steel, heat resistant steel, wear resistant steel, and other special steels of physical and chemical properties. Alloy structural steel has preferable mechanical property than that of carbon structural steel, high performance of heat treatment especially.
The alloy is usually produced by EAF /VD /LF followed by electroslag refining (ESR) if necessary for special purpose. Bars and, where applicable, forgings are subjected to ultrasonic examination based on the different level according to the buyers' requirements.
Bars are usually supplied bright in the annealed condition, or bright annealing specially.
Final heat treatment - Quenched and tempered.
MATERIAL SPECIFICATIONS - DIN EN 10083-2 (2006), DIN 17200 (1987)
CHEMICAL COMPOSITION (mass weight - %)
Carbon, C (％): 0.28 ~ 0.35
Silicon, Si (％): ≤ 0.40
Manganese, Mn (％): 0.60 ~ 0.90
Phosphorus, P (％) ≤: 0.035
Sulfur, S (％) ≤: 0.035
Chromium, Cr (％): 0.40 ~ 0.60
Silicon, Si (％): ≤ 0.40
Manganese, Mn (％): 0.60 ~ 0.90
Phosphorus, P (％) ≤: 0.035
Sulfur, S (％) ≤: 0.035
Chromium, Cr (％): 0.40 ~ 0.60
Molybdenum, Mo (％): -
Copper, Cu (％): -
Copper, Cu (％): -
MECHANICAL PROPERTIES - HOT WORKING, HEAT TREATMENT AND HARDNESS
Hot working temperature /℃: 1100～850
Heat treatment temperature /℃ | annealing: 650~700
Heat treatment temperature /℃ | annealing: 650~700
Heat treatment temperature /℃ | Normalizing: 840~870
Heat treatment temperature /℃ | Quenching: 830~860 Oil
Heat treatment temperature /℃ | Tempering : 540~680
Hardness after annealing ≤HBS: 197
Heat treatment temperature /℃ | Quenching: 830~860 Oil
Heat treatment temperature /℃ | Tempering : 540~680
Hardness after annealing ≤HBS: 197
Steel dimension /mm: ≤ 16
| σb ≥ MPa: 700 ~ 850
| σs ≥ MPa: 450
| δ5 ≥ (%): 15
| ψ ≥ (%): 40
| AKV ≥ J: 40
| σb ≥ MPa: 700 ~ 850
| σs ≥ MPa: 450
| δ5 ≥ (%): 15
| ψ ≥ (%): 40
| AKV ≥ J: 40
Steel dimension /mm: 17 - 40
| σb ≥/MPa: 600 ~ 750
| σs ≥ MPa: 350
| δ5 ≥ (%): 15
| σb ≥/MPa: 600 ~ 750
| σs ≥ MPa: 350
| δ5 ≥ (%): 15
| ψ ≥ (%): 45
| AKV ≥ J: 40
| AKV ≥ J: 40
Steel dimension /mm: 41 - 100
| σb ≥ MPa: 500 ~ 650
| σs ≥ MPa: 300
| δ5 ≥ (%): 17
| σb ≥ MPa: 500 ~ 650
| σs ≥ MPa: 300
| δ5 ≥ (%): 17
| ψ ≥ (%): 50
| AKV ≥ J: 40
| AKV ≥ J: 40
TECHNICAL SALES ASSISTANCE
If you meet further on any technical enquiry. pleased to email or call our resident team of qualified production engineers, Email: sales@ccsteels.com
PRODUCT PROFILE AND AVAILABLE FORMS
Round bar / Wire rod (Diameter): 5.5mm to 800mm
Square bar / Flat bar: 3mm to 1000mm
Plate / Steel strip: 0.1mm to 1000mm
Width: 8mm to 1000mm
Steel sheet: thickness 0.50 ~ 6.00mm, width 1000mm X length 1000/2000mm - Standard size
Length: random length or based on the customer's special requirement
Forged steel shape: stepped shafts with flanks / discs /tubes /slugs /donuts /cubes /other different shapes based on OEM.
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