1.7701
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DIN 17221 Material specification 1.7701 Round bar, Flat bar Forged piece 1.7701 ESR, Hot blooming / Forging / Rolling, Heat treatment
OFFICIAL TEST CERTIFICATE: issued by TUV - SGS - BV
TECHNICAL DATA SHEET - DIN 1.7701
MATERIAL CATEGORY - Spring steel
MATERIAL SPECIFICATIONS: DIN 17221 (1988)
CHEMICAL COMPOSITIONS (mass weight %)
Carbon, C (％): 0.48 ～ 0.56
Silicon, Si (％): ≤ 0.40
Manganese, Mn (％): 0.70 ～ 1.10
Phosphorus, P (％) ≤: 0.025
Sulfur, S (％) ≤: 0.025
Chromium, Cr (％): 0.90 ～ 1.20
Molybdenum, Mo (％): 0.15 ～ 0.30
Silicon, Si (％): ≤ 0.40
Manganese, Mn (％): 0.70 ～ 1.10
Phosphorus, P (％) ≤: 0.025
Sulfur, S (％) ≤: 0.025
Chromium, Cr (％): 0.90 ～ 1.20
Molybdenum, Mo (％): 0.15 ～ 0.30
Vanadium, V (％): 0.10 ～ 0.20
Others (%): Cu+10Sn ± 0.60
MECHANICAL PROPERTIES UNDER ROOM TEMP.
Dimension scope / flat bar: 40
Dimension scope / round bar: 60
Tensile strength, ≥ σb / MPa: 1370～1670
Yield strength, ≥ σs / MPa: 1175
Elongation, ≥ δ5 (%): 6.0
Reduction of area, ≥ |ψ (%): -
≥|AKV - DVM-V /J: -
Dimension scope / round bar: 60
Tensile strength, ≥ σb / MPa: 1370～1670
Yield strength, ≥ σs / MPa: 1175
Elongation, ≥ δ5 (%): 6.0
Reduction of area, ≥ |ψ (%): -
≥|AKV - DVM-V /J: -
HOT WORKING AND HEAT TREATMENT
Hot working temperature /℃: 1050～850
Thermal forming temperature / ℃: 920～830
/ ℃ | Annealed: 640～680
/ ℃ | Normalized: 850～880
/ ℃ | Quenched: 830～860 oil cooled
/ ℃ | Tempered: 350～550
Annealed hardness ≤ HBS: 255
Thermal forming temperature / ℃: 920～830
/ ℃ | Annealed: 640～680
/ ℃ | Normalized: 850～880
/ ℃ | Quenched: 830～860 oil cooled
/ ℃ | Tempered: 350～550
Annealed hardness ≤ HBS: 255
PRODUCT DESCRIPTION
The alloy is usually produced by EAF / LF / VD followed by electroslag refining (ESR) if necessary for special purpose. Bars and, where applicable, forgings are subjected to ultrasonic examination based on the different levels according to the buyers' requirements.
Bars are usually supplied black in the annealed condition.
Final heat treatment - Quenched and tempered.
The alloy is usually produced by EAF / LF / VD followed by electroslag refining (ESR) if necessary for special purpose. Bars and, where applicable, forgings are subjected to ultrasonic examination based on the different levels according to the buyers' requirements.
Bars are usually supplied black in the annealed condition.
Final heat treatment - Quenched and tempered.
FORMS & DIMENSIONS
Round bar / rod (diameter): 5.5mm to 500mm
Square bar / flat bar: 8mm to 600mm
Length: Fixed length or random length or based on the customer's special requirement.
Round bar / rod (diameter): 5.5mm to 500mm
Square bar / flat bar: 8mm to 600mm
Length: Fixed length or random length or based on the customer's special requirement.
Heavy/middle plate via hot rolled: T60 - 400mm X W60 - 1000mm X L1000 - 12000mm
Sheet steel via cold rolled: T0.5 - 6mm X W100 - 1000mm X L1000 - 2000mm
Steel strip via cold rolled: T0.1 - 3mm X W5 - 200mm X L (or in coil form)
Forging piece: stepped shafts, other different shapes based on OEM.
Sheet steel via cold rolled: T0.5 - 6mm X W100 - 1000mm X L1000 - 2000mm
Steel strip via cold rolled: T0.1 - 3mm X W5 - 200mm X L (or in coil form)
Forging piece: stepped shafts, 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 engineers. Email: sales@ccsteels.com
If you meet further on any technical enquiry, pleased to EMAIL our resident team of qualified production engineers. Email: sales@ccsteels.com
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