ASTM A540 Gr.B21
2016-04-26 09:27:08 Origin： Remark：0 Click：
Technical specifications for alloy steel bolting materials ASTM A540 Grade B21 datasheet, ASTM A540 Gr.B21 Chemical compositions,A540 Gr.B21 Mechanical properties from Steelmaking, ESR melted, Blooming, Hot forging,Hot rolling,Heat treatment, Straightening, 100% Ultrasonic test, Cold working, Peeled or rough turned machining. Technical specification ASTM A540. We also possess the advanced precision machining equipments for catering for your different special requirements.
TECHNICAL DATA SHEET - ASTM A540 Gr.B21
MATERIAL CATEGORY: alloy steel bolting materials for special applications
MATERIAL STANDARDS: ASTM A540
MATERIAL TYPE: Cr-Mo-V
OFFICIAL TEST CERTIFICATE: issued by TUV - SGS - BV
CHEMICAL COMPOSITION (WEIGHT %)
C (％): 0.36 ~ 0.44
Si (％): 0.15 ~ 0.35
Mn (％): 0.45 ~ 0.70
P (％)≤: 0.025
S (％)≤: 0.025
Cr (％): 0.80 ~ 1.15
Ni (%): -
Mo (％): 0.50 ~ 0.65
OFFICIAL TEST CERTIFICATE: issued by TUV - SGS - BV
CHEMICAL COMPOSITION (WEIGHT %)
C (％): 0.36 ~ 0.44
Si (％): 0.15 ~ 0.35
Mn (％): 0.45 ~ 0.70
P (％)≤: 0.025
S (％)≤: 0.025
Cr (％): 0.80 ~ 1.15
Ni (%): -
Mo (％): 0.50 ~ 0.65
V (%): 0.25 ~ 0.35
MECHANICAL PROPERTIES UNDER ROOM TEMP.
Bar size: 2 inches
Bar size: 2 inches
Tensile strength σb≥/MPa: 830
Yield strength σs≥/MPa: 726
Elongation δ5≥(%): 15
Reduction of area ф ≥ (％): 50
Yield strength σs≥/MPa: 726
Elongation δ5≥(%): 15
Reduction of area ф ≥ (％): 50
Surface hardness: HB 241 ~ 285
MAIN FEATURES AND MELTING PROCESS
The steels shall be manufactured by melting process EAF + LF + VD, IFF + ESR Melted and shall be finished by hot-rolled / hot forged / cold finished.
Forgings may be furnished in one of the following conditions: stress relieving; annealing; solution treatment; solution treatment and ageing; normalizing; normalizing and tempering; or quenching and tempering.
Heat and product analyses shall be employed to assess the conformance of steels with required chemical compositions.
Forgings shall examined by tension and Charpy impact tests and conform to required mechanical properties such as yield strength, tensile strength, elongation, reduction of area, minimum room-temperature Charpy V-notch energy absorption, maximum annealed hardness, and section size capability. Nondestructive tests, such as magnetic particle, liquid penetrant, and ultrasonic inspection procedures, shall also be performed.
TYPICAL APPLICATIONS
Power generation – turbine fasteners – boiler support rods
Process plant – fasteners
Mechanical gears, gear shaft, main axis, valve rods
Mechanical parts - connecting rods, bolts and nuts
Multidiameter shafts
PRODUCT PROFILE AND AVAILABLE FORMS
Round bar (Diameter): 0.50mm to 800mm
Square bar / Flat bar: 3mm to 800mm
Length: random length, fixed length or based on the customer's special requirement.
Steel strip: T0.20 ~ 3mm X W10 ~ 2000mm X Coil
Heavy/middle plate via hot rolled: T4 - 200mm X W1000- 2500mm X L1000-12000mm
Forging piece: stepped shafts with flanks / discs /tubes /slugs /donuts /cubes /other different shapes based on OEM.
The steels shall be manufactured by melting process EAF + LF + VD, IFF + ESR Melted and shall be finished by hot-rolled / hot forged / cold finished.
Forgings may be furnished in one of the following conditions: stress relieving; annealing; solution treatment; solution treatment and ageing; normalizing; normalizing and tempering; or quenching and tempering.
Heat and product analyses shall be employed to assess the conformance of steels with required chemical compositions.
Forgings shall examined by tension and Charpy impact tests and conform to required mechanical properties such as yield strength, tensile strength, elongation, reduction of area, minimum room-temperature Charpy V-notch energy absorption, maximum annealed hardness, and section size capability. Nondestructive tests, such as magnetic particle, liquid penetrant, and ultrasonic inspection procedures, shall also be performed.
TYPICAL APPLICATIONS
Power generation – turbine fasteners – boiler support rods
Process plant – fasteners
Mechanical gears, gear shaft, main axis, valve rods
Mechanical parts - connecting rods, bolts and nuts
Multidiameter shafts
PRODUCT PROFILE AND AVAILABLE FORMS
Round bar (Diameter): 0.50mm to 800mm
Square bar / Flat bar: 3mm to 800mm
Length: random length, fixed length or based on the customer's special requirement.
Steel strip: T0.20 ~ 3mm X W10 ~ 2000mm X Coil
Heavy/middle plate via hot rolled: T4 - 200mm X W1000- 2500mm X L1000-12000mm
Forging piece: stepped shafts with flanks / discs /tubes /slugs /donuts /cubes /other different shapes based on OEM.
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