K91271
2026-08-04 11:01:00 Origin： Remark：0 Click：
Specifications K91271 low alloy seamless pipe for boiler, heat exchanger, condenser, round bar, flat bar, plate K91271 properties, electroslag remelting, Ultrasonic testing, hot forged, rolled, heat treated
OFFICIAL TEST CERTIFICATE: issued by TUV - SGS - CNAS
TECHNICAL DATA SHEET - UNS K91271
Material category: low alloy seamless pipe for boiler, heat exchanger, condenser
Typical chemical compositions (mass weight - %)
Carbon, C (％): 0.07 ~ 0.14
Silicon, Si (％): ≤ 0.50
Manganese, Mn (％): ≤ 0.70
Phosphorus, P (％): ≤ 0.020
Sulfur, S (％): ≤ 0.010
Chromium, Cr (％): 10.0 ~ 12.5
Nickel, Ni (％): ≤ 0.50
Molybdenum, Mo (％): 0.25 ~ 0.60
Tungsten, W (％): 1.50 ~ 2.50
Silicon, Si (％): ≤ 0.50
Manganese, Mn (％): ≤ 0.70
Phosphorus, P (％): ≤ 0.020
Sulfur, S (％): ≤ 0.010
Chromium, Cr (％): 10.0 ~ 12.5
Nickel, Ni (％): ≤ 0.50
Molybdenum, Mo (％): 0.25 ~ 0.60
Tungsten, W (％): 1.50 ~ 2.50
Vanadium, V (%): 0.15 ~ 0.30
Copper, Cu (%): 0.30 ~ 1.70
Niobium, Nb (%): 0.04 ~ 0.10
Boron, B (%): 0.0005 ~ 0.005
Nitrogen, N (%): 0.040 ~ 0.10
Others (%): Al ≤ 0.04
MECHANICAL PROPERTIES UNDER ROOM TEMP.
Tensile strength, σb ≥ MPa: 620
Yield strength, σ0.2 ≥ MPa: 400
Elongation, 5A ≥ (％): 20.0
Hardness ≤ HBW: 179
Yield strength, σ0.2 ≥ MPa: 400
Elongation, 5A ≥ (％): 20.0
Hardness ≤ HBW: 179
PRODUCT DESCRIPTION
The alloy is usually produced by EAF + VD / BEF followed by electroslag refining (ESR) / VAR 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 - solution treatment / QT
The alloy is usually produced by EAF + VD / BEF followed by electroslag refining (ESR) / VAR 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 - solution treatment / QT
HEAT TREATMENT PRACTICE
Heat treatment is only suitable for specific grades of stainless steel. When heat treating a stainless the hardening temperatures, including rate of heating, cooling and soaking times will vary due to several factors such as the shape and size of each component. Other considerations during the heat treatment process include the type of furnace, quenching medium and work piece transfer facilities. Please consult with the heat treatment provider for whole guidance on heat treatment of stainless steel grades. We are delighted to help to work with you the special heat treatment based on your special requirements.
Heat treatment is only suitable for specific grades of stainless steel. When heat treating a stainless the hardening temperatures, including rate of heating, cooling and soaking times will vary due to several factors such as the shape and size of each component. Other considerations during the heat treatment process include the type of furnace, quenching medium and work piece transfer facilities. Please consult with the heat treatment provider for whole guidance on heat treatment of stainless steel grades. We are delighted to help to work with you the special heat treatment based on your special requirements.
TYPICAL APPLICATIONS
Boiler, heat exchanger, condenser
Chemical equipments
Electronics
Electronics
Bolt and nut
Valve
TECHNICAL SALES ASSISTANCE
If you meet further on any technical enquiry, pleased to EMAIL our resident team of qualified production engineers, Email us: sales@ccsteels.com
If you meet further on any technical enquiry, pleased to EMAIL our resident team of qualified production engineers, Email us: sales@ccsteels.com
PROFILE & DIMENSIONS
Round bar & rod & disc (diameter): 6.0 to 850 mm
Square bar & flat bar: 10 to 600 mm
Length: random length or based on the customer's special requirement.
Round bar & rod & disc (diameter): 6.0 to 850 mm
Square bar & flat bar: 10 to 600 mm
Length: random length or based on the customer's special requirement.
Heavy/middle plate via hot rolled: T7 ~ 300 X W30 ~ 1000 X L1000 ~ 12000 mm
Sheet steel via cold rolled: T0.5 - 4mm X W15 ~ 1000 X L1000 ~ 2000 mm
Steel strip via cold rolled: T0.3 ~ 3 X W10 ~ 200 X L (or in coil form)
Forging piece: stepped shafts, and other different shapes based on OEM.
Sheet steel via cold rolled: T0.5 - 4mm X W15 ~ 1000 X L1000 ~ 2000 mm
Steel strip via cold rolled: T0.3 ~ 3 X W10 ~ 200 X L (or in coil form)
Forging piece: stepped shafts, and other different shapes based on OEM.
JIANGYOU LONGHAI SPECIAL STEEL CO.,LTD
ISO 9001-2015 Certified by UKAS
Raw material stock available
Custom 450 / XM-25 / S45000, 403 ESR, AISI 616 / 422 ESR, B50A365 / 403Cb+
17-4PH / 630, M-152 / 1.4938 / S151 / S159, S111, FV520B / S143 / 1.4594
X8CrMnN18-18/1.3816, X40MnCrN19/1.3813, X40MnCr18/1.3817, X55MnCrN18-4/1.3818
13Х11Н2B2MФ / AE961W, 11Х11Н2B2MФ / 16Х11Н2B2MФ
15-5PH / XM-12 (S15500), A-286 AISI 660 / S66286
10705BU, 10705MBU, 10705AJ
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