ASTM A437 type B4C datasheet,ASTM A437 type B4C chemical,ASTM A437 type B4C heat treatment
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ASTM A437 type B4C
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Standard specifications for stainless and alloy-steel turbine-type bolting specially heat treated for high temperature service ASTM A437 Grade B4C datasheet, ASTM A437-12 Grade B4C Chemical compositions, mechanical properties from Steelmaking, ESR melting, Hot blooming, UT,ASTM A437-12 Grade B4CHot forging, Hot rolling, Heat treatment, Straightening, 100% Ultrasonic test, Cold working or Machined. Technical specifications - ASTM A437 -2012.

TECHNICAL DATA SHEET - ASTM A437 Grade B4C


TYPE OF STEEL: Martensitic stainless steel
OFFICIAL TEST CERTIFICATE: issued by TUV - SGS BV
Technical standards: ASTM A437 - 2012
CHEMICAL COMPOSITION (WEIGHT %)
C (%):     0.20 ~ 0.25
Si (%):     0.20 ~ 0.50
Mn (%):   0.50 ~ 1.00
P (%)≤:   0.025
S (%)≤:   0.015
Cr (%):    11.0 ~ 12.5
Ni (%):    0.50 ~ 1.00
Mo (%):   0.90 ~ 1.25
W (%):    0.90 ~ 1.25
V (%):     0.20 ~ 0.30
Al (%):    ≤ 0.05
Ti (%):    ≤ 0.05
Tin (%):  0.04
MECHANICAL PROPERTIES UNDER ROOM TEMPERATURE
Condition: Quenched 1025 ~ 1050℃, oil cooled, tempered 620℃ min., air cooled
Annealed hardness: 248 max.
Tensile strength,σb/≥ MPa: 790
Yield strength, σ0.2/≥ MPa: 585
Elongation, δ ≥(%): 18.0
QT hardness: HB277 max.
Impact /J: 24 min.
PRODUCT DESCRIPTION

The alloy is usually produced by EAF+LF+AOD / VOD /VIM 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
Round bar (Diameter): 5.50mm to 800mm
Square bar / Flat bar: 3mm to 500mm
Forging piece: stepped shafts with flanks / discs /tubes /slugs /donuts /cubes /other different shapes based on OEM.

TECHNICAL SALES ASSISTANCE
If you meet further on any technical enquiry. pleased to EMAIL (lh.steel@hotmail.com ) our resident team of qualified production engineers.

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