20NCD7
2025-12-26 09:37:00 Origin： Remark：0 Click：
NF A35-565 technical specification of bearing steel 20NCD7 ESR melted, hot forged / rolled round bar, rod, plate 20NCD7 stock available forgings
Official Test Certificate: issued by TUV - SGS - BV
TECHNICAL DATA SHEET - 20NCD7
Material type: bearing steel
Material specifications: NF A35-565
Typical chemical compositions (mass fraction %)
Carbon, C (％): 0.17 ~ 0.22
Silicon, Si (％): 0.15 ~ 0.35
Silicon, Si (％): 0.15 ~ 0.35
Manganese, Mn (％): 0.45 ~ 0.65
Phosphorus, P (％): ≤ 0.025
Sulfur, S (％): ≤ 0.015
Phosphorus, P (％): ≤ 0.025
Sulfur, S (％): ≤ 0.015
Chromium, Cr (%): 0.40 ~ 0.60
Molybdenum, Mo (%): 0.20 ~ 0.30
Nickel, Ni (%): 1.65 ~ 2.00
Others (％): copper ≤ 0.30, aluminum ≤ 0.050
Others (％): copper ≤ 0.30, aluminum ≤ 0.050
MECHANICAL PROPERTY UNDER ROOM TEMP.
Tensile strength, Rm ≥ MPa: 980
Yield strength, Rp0.2 ≥ MPa: 685
Elongation, A5 ≥ (%): 8.0
Yield strength, Rp0.2 ≥ MPa: 685
Elongation, A5 ≥ (%): 8.0
Reduction of area, Z (％) ≥: 35
PRODUCT DESCRIPTION
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 + LF + VD or EF 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.
Final heat treatment - quenched and tempered.
PRODUCT PROFILE
Round bar / rod / disc (diameter): 6.0 to 800 mm
Square bar / flat bar: 8 to 600 mm
Length: Fixed length or random length or based on the customer's special requirement.
Round bar / rod / disc (diameter): 6.0 to 800 mm
Square bar / flat bar: 8 to 600 mm
Length: Fixed length or random length or based on the customer's special requirement.
Heavy/middle plate via hot rolled: T7 ~ 200 X W100 - 1500 X L1000 ~ 12000 mm
Sheet steel via cold rolled: T0.5 - 6 X W60 ~ 1000 X L1000 ~ 2000 mm
Steel strip via cold rolled: T0.3 - 3 X W5 ~ 200 X L mm (or in coil form)
Forging piece: stepped shafts, and other different shapes based on OEM.
Sheet steel via cold rolled: T0.5 - 6 X W60 ~ 1000 X L1000 ~ 2000 mm
Steel strip via cold rolled: T0.3 - 3 X W5 ~ 200 X L mm (or in coil form)
Forging piece: stepped shafts, and other different shapes based on OEM.
TECHNICAL SALES ASSISTANCE
If you meet further on any technical enquiry. pleased to EMAIL our resident team of qualified production engineer. Email: sales@ccsteels.com
If you meet further on any technical enquiry. pleased to EMAIL our resident team of qualified production engineer. Email: sales@ccsteels.com
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