ASTM A437 Gr.B4D
2017-03-15 09:32:28 Origin： Remark：0 Click：
ASTM A437 Grade B4D is Middle carbon strutural steel with alloy elements 1.0Cr-0.55Mo-0.3V. Round bar, Flat bar, Forging Ring Hot forging & rolling, Heat treatment.
TECHNICAL DATASHEET - ASTM A437-12 Grade B4D
TYPE OF STEEL: Middle carbon structural steel
OFFICIAL TEST CERTIFICATE: issued by TUV - SGS - BV
Technical standards: ASTM A437 - 2012
MAIN CHEMICAL COMPOSITION (mass weight - %)
Carbon, C (％): 0.36 ~ 0.44
Silicon, Si (％): 0.20 ~ 0.35
Manganese, Mn (％): 0.45 ~ 0.70
Phosphorus, P (％)≤: 0.040
Sulfur, S (％)≤: 0.040
Chromium, Cr (％): 0.80 ~ 1.15
Nickel, Ni (％): -
Molybdenum, Mo (%): 0.50 ~ 0.65
Vanadium, V (%): 0.25 ~ 0.35
Tungsten, W (%): -
Aluminum, Al (%): ≤ 0.015
Titanium, Ti (%): -
Silicon, Si (％): 0.20 ~ 0.35
Manganese, Mn (％): 0.45 ~ 0.70
Phosphorus, P (％)≤: 0.040
Sulfur, S (％)≤: 0.040
Chromium, Cr (％): 0.80 ~ 1.15
Nickel, Ni (％): -
Molybdenum, Mo (%): 0.50 ~ 0.65
Vanadium, V (%): 0.25 ~ 0.35
Tungsten, W (%): -
Aluminum, Al (%): ≤ 0.015
Titanium, Ti (%): -
MECHANICAL PROPERTIES UNDER ROOM TEMPERATURE
Condition: Quenched 1025 ~ 1050℃, oil cooled
Tempered 620℃ min., air cooled
Annealed hardness: 248 max.
Tensile strength,σb/≥ MPa: 860
Yield strength, σ0.2/≥ MPa: 720
Elongation, δ ≥(％): 18.0
Yield strength, σ0.2/≥ MPa: 720
Elongation, δ ≥(％): 18.0
QT hardness: HB 302 max.
Impact /J: 34 min.
PRODUCT DESCRIPTION
The alloy is usually produced by EAF+LF+ 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/bright in the annealed condition.
Final heat treatment - quenched and tempered.
PRODUCT PROFILE & DIMENSION
Round bar & Disc (diameter): 5.5 to 500mm
Square bar / flat bar: 10 to 500mm
Sheet steel via cold rolled: T0.5 - 3.0 X W6 - 1000 X L1000 - 2000mm
Steel strip via cold rolled: T0.1 - 3 X W5 - 200 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. E-mail:sales@ccsteels.com
If you meet further on any technical enquiry, pleased to EMAIL our resident team of qualified production engineers. E-mail:sales@ccsteels.com
Previous page：Grade C20
Last page：UNS N10629
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