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Specifications 31CrV2 Datasheet, Ex-stock 31CrV2 Chemical, Inventory 31CrV2 Properties from Steelmaking, Blooming, Hot forging, Hot rolling, Heat treatment, Straightening, 100% Ultrasonic flaw detection test, Cold working or Machined. All of these materials conform to Military standard, nuclear power. 100% Ultrasonic test ASTM E2375 /SAE AMS 2154 /SEP 1923 /GB/T 4162 /EN 10228-3.
DIN 31CrV2 / DIN 31CrV3 / W-Nr 1.2208 - MATERIAL DATA SHEET MATERIAL CATEGORY - Cold work alloy tool steel
TYPICAL APPLICATIONS - Alloy tool steel is widely used to produce the cutting tool, cold/heat distortion mould and measuring implements,
and further to manufacture the piston, valve, valve seat of fuel pump of diesel engine.
Air hammer tools
The alloy is usually produced by EAF /VD /LF followed by electroslag refining (ESR) if necessary for special purpose.
Bars and, where applicable, forgings are subjected to ultrasonic examination based on the different level according to the buyers' requirements.
Bars are usually supplied bright in the softened condition.
Final heat treatment - heat treatment / QT
MATERIAL SPECIFICATIONS - EN ISO 4957: 2000 , DIN 17350 (1980)
Round bar / flat bar / hollow bar / forgings / rings
Bright - peeled + polishing /centerless grinding / peeled + slidabrading
Forged - ring /tube /pipe casing /discs /shaft
Round bar / Wire rod (Diameter): 5.5mm to 650mm
Square bar / Flat bar: 3mm to 600mm
Plate / Sheet steel / Steel strip: 0.1mm to 300mm
Width: 8mm to 1500mm
Length: random length or based on the customer's special requirement.
Forged steel shape: stepped shafts with flanks / discs /tubes /slugs /donuts /cubes /other different shapes based on OEM.
CHEMICAL COMPOSITION (WEIGHT %)
C (％): 0.28 ~ 0.35
Si (％): 0.25 ~ 0.40
Mn (％): 0.40 ~ 0.60
P (％)≤: 0.030
S (％)≤: 0.030
Cr (％): 0.40 ~ 0.70
Mo (％): -
V (％): 0.07 ~ 0.12
MECHANICAL PROPERTIES - HOT WORKING, HEAT TREATMENT AND HARDNESS
Hot working tenperature /℃: 1050～850
Annealing temperature /℃: 680～720
Hardness after annealing ≤HBW: 220
Quenching temperature /℃: 830～860
Cooling medium: water / water
Common tempering temperature /℃: 180~250
Hardness after tempering at temperature HRC|100℃: 52
Hardness after tempering at temperature HRC|200℃: 50
Hardness after tempering at temperature HRC|300℃: 47
Hardness after tempering at temperature HRC|400℃: 43
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