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INVESTMENT CASTING AUTO PART OF CHROME MOLYBDENUM 42CRMO4 ALLOY STEEL

INVESTMENT CASTING AUTO PART OF CHROME MOLYBDENUM 42CRMO4 ALLOY STEEL

INVESTMENT CASTING AUTO PART OF CHROME MOLYBDENUM 42CRMO4 ALLOY STEEL
CategoriesLost Wax Castings
BrandOBT
MetalsChrome Molybdenum Cast Alloy Steel 42CrMo4
ManufacturingInvestment Casting (Lost Wax Casting Process)
ApplicationLock Hook of Auto Parts
Heat TreatmentNormalizing and QT (Quenching + Tempering)
TestingCMM, Mechanical Properties, Chemical Compositions
Update Time2022/7/7
Detail Information

Custom Chrome Molybdenum 42CrMo4 alloy steel  investment casting products for lock hook of automobile with electrophoresis surface treatment

42CrMo4 (1.7225) from specification of EN 10083-3, which is usually heat treated by QT (Queching + Tempering), is widely used to produce investment castings. it has high strength, high toughness, good hardenability, temper brittleness, high fatigue limit, good impact resistance after quenching and tempering, and good low temperature impact toughness. The equivalent grade of 42CrMo4 are 4140 (ASTM, USA) and 42CrMo (GB/T 3077, China)

Chemical Composition %
Country (Region)StandardSteel Name (Steel Number)CSi ≤MnP ≤S ≤CrMo
European UnionEN 10083-342CrMo4 (1.7225)0.38-0.450.40.60-0.900.0250.0350.90-1.200.15-0.30

42CrMo4 steel properties at room temperature in the quenched and tempered condition.

Yield strength:
≥900 N/mm2 (d≤16mm, t≤8mm)
≥750 N/mm2 (16 < d ≤ 40mm, 8 < t ≤ 20mm)
≥900 N/mm2 (40 < d ≤ 100mm, 20 < t ≤ 60mm)
≥900 N/mm2 (100 < d ≤ 160mm, 60 < t ≤ 100mm)
≥900 N/mm2 (160 < d ≤ 250mm, 100 < t ≤ 160mm)

Tensile strength:
1100-1300 N/mm2 (d≤16mm, t≤8mm)
1000-1200 N/mm2 (16 < d ≤ 40mm, 8 < t ≤ 20mm)
900-1100 N/mm2 (40 < d ≤ 100mm, 20 < t ≤ 60mm)
850-950 N/mm2 (100 < d ≤ 160mm, 60 < t ≤ 100mm)
750-900 N/mm2 (160 < d ≤ 250mm, 100 < t ≤ 160mm)

Elongation: ≥ 10% (d≤16mm, t≤8mm)

Impact strength of longitudinal Charpy-V-notch test:
≥35J (16 < d ≤ 250mm, 8 < t ≤ 160mm)
≥11% (16 < d ≤ 40mm, 8 < t ≤ 20mm)
≥12% (40 < d ≤ 100mm, 20 < t ≤ 60mm)
≥13% (100 < d ≤ 160mm, 60 < t ≤ 100mm)
≥14% (160 < d ≤ 250mm, 100 < t ≤ 160mm)

42CrMo4+QT hardness in HRC: ≥53 (after flame or induction hardening)
42CrMo4 hardness in HBW: ≤255 (treated to improve shearability); ≤241 (soft annealed)

Carbon steel, low alloy steel, high alloy steel and tool steel castings are used in several industrial applications. With their numerous grades, steel and their alloys can be heat-treated to improve its yield and tensile strength and, adjust hardness or ductility to the engineer's application needs or desired mechanical properties.

Chemical Composition of Some of Chrome Molybdenum Cast Steel
Steel GradeC (%)Si (%)Mn (%)Cr (%)Mo (%)P、S (%)
ZG20CrMo0.17-0.250.20-0.450.50-0.800.50-0.800.40-0.60≤0.035
ZG35CrMo0.30-0.370.30-0.500.50-0.800.80-1.200.20-0.30≤0.035
ZG40CrMo0.35-0.450.17-0.450.50-0.800.80-1.100.20-0.30≤0.04
ZG20Cr5Mo0.15-0.25≤0.50≤0.604.00-6.000.50-0.65≤0.04
ZG17CrMo0.15-0.200.30-0.600.50-0.801.20-1.500.45-0.55≤0.04

Using the investment casting process, OBT casting foundry is capable of meeting material specifications according to ASTM, SAE, AISI, ACI, DIN, EN, ISO, and GB standards. We have more than 100 different ferrous and non-ferrous alloys with which we cast parts using complex design criteria. Our dimensionally and geometrically complex investment castings are produced to net shape, minimizing the need for secondary machining.

Chromium-molybdenum cast steel is widely used in industrial fields with relatively high mechanical properties. The addition of molybdenum to chromium steel can increase the strength of steel castings without having a significant impact on the impact toughness of cast steel. Moreover, chromium-molybdenum cast steel has very good high temperature performance and creep resistance. After quenching and tempering or normalizing heat treatment, chromium-molybdenum cast steel can obtain excellent mechanical properties.

Molybdenum can improve the hardenability of cast steel and reduce the temper brittleness of cast steel. Chromium-molybdenum cast steel is used for large-section castings and steel castings that require deep hardening.

Investment Casting Technical Data at OBT Foundry
R & DSoftware: Solidworks, CAD, Procast, Pro-e
Lead Time for Development and Samples: 25 to 35 days
Molten MetalFerritic Stainless Steel, Martensitic Stainless Steel, Austenitic stainless steel, Precipitation Hardening Stainless Steel, Duplex Stainless Steel
Carbon Steel, Alloy Steel, Tool Steel, Heat Resistant Steel, 
Nickle-base Alloy, Aluminium Alloy, Copper-base Alloy, Cobalt-base Alloy
Metal StandardISO, GB, ASTM, SAE, GOST EN, DIN, JIS, BS
Material for Shell BuildingSilica Sol (Precipitated Silica )
Water Glass (Sodium Silicate)
Mixtures of Silica Sol and Water Glass
Technical ParameterPiece Weight: 2 gram to 200 kilo gram
Max Dimension: 1,000 mm for Diameter or Length
Min Wall Thickness: 1.5mm
Casting Roughness: Ra 3.2-6.4, Machining Roughness: Ra 1.6
Tolerance of Casting: VDG P690, D1/CT5-7
Tolerance of Machining: ISO 2768-mk/IT6
Inner Core: Ceramic Core, Urea Core, Water Soluble Wax Core
Heat TreatmentNormalizing, Tempering, Quenching, Annealing, Solution, Carburization.
Surface TreatmentPolishing, Sand / Shot Blasting, Zinc Plating, Nickel Plating, Oxidation Treatment, Phosphating, Powder Painting, Geormet, Anodizing
Dimension TestingCMM, Vernier Caliper, Inside Caliper. Depth Gage, Height Gage, Go/No go Gage, Special Fixtures
Chemical InspectionChemical Compostion Analysis (20 chemical elements), Cleanliness Inspection, X-ray Radiographic Inspection, Carbon-Sulfur Analyser
Physical InspectionDynamic Balancing, Static Blancing, Mechanical Properties (Hardness, Yield Strength, Tensile Strength), Elongation
Production CapacityMore than 250 tons per month, more than 3,000 tons annually.

investment casting foundry - RMC

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China Lost Wax Casting Foundry
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