ASTM A437 Gr.B4B Stockist, ASTM A437 Gr.B4B Equivalent Steel

ASTM A437 Gr.B4B
2017-03-14 08:47:49   Origin:   Remark:0 Click:

Inventory ASTM A437 Gr.B4B Round bar, Bolts and nuts A437 Gr. B4B ESR melting, Hot blooming, UT, Hot forging rolling, Heat treatment.
TECHNICAL DATA SHEET - ASTM A437 Grade B4B
TYPE OF STEEL: Martensitic
stainless steel
OFFICIAL TEST CERTIFICATE: issued by TUV - SGS - CICC 
MATERIAL STANDARDS: ASTM A437 - 2012
ON-HAND STOCK - Diam. 20 ~ 280mm
MAIN CHEMICAL COMPOSITION ( mass weight - %)
Carbon, C (%):  0.20 ~ 0.25
Silicon, Si (%):   0.20 ~ 0.50
Manganese, Mn (%):  0.50 ~ 1.00
Phosphorus, P (%)≤:  0.025
Sulfur, S (%)≤:  0.025
Chromium, Cr (%):  11.0 ~ 12.5
Nickel, Ni (%):  0.50 ~ 1.00
Molybdenum, Mo (%):  0.90 ~ 1.25
Tungsten, W (%):  0.90 ~ 1.25
Vanadium, V (%):  0.20 ~ 0.30
Aluminum, Al (%):  ≤ 0.05
Titanium, Ti (%):  ≤ 0.05
MECHANICAL PROPERTIES UNDER ROOM TEMP.
Condition: Quenched 1025 ~ 1050℃, oil cooled
                Tempered 650℃ min., air cooled
Annealed hardness: 321 max.
Tensile strength,σb/≥ MPa: 970
Yield strength, σ0.2/≥ MPa: 720
Elongation, δ ≥(%): 13.0
QT hardness: 352 max.
Impact, AKV: 14J min.
PRODUCT DESCRIPTION
The alloy is usually produced by EAF+LF+AOD / VOD 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 + SRA.
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.
PRODUCT PROFILE & DIMENSIONS
Round bar & Disc (diameter): 5.5mm to 850mm
Square bar / flat bar: 10mm to 600mm
Plate: T60 ~ 400 X W60 ~ 1000 X L1000 ~ 5000mm
Sheet steel via cold rolled: T0.5 - 3.0mm X W6 - 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 qualified product engineers, Email at: sales@ccsteels.com

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