Durable Marine Forged Shafts with 40cr for Enhanced Ship Performance

• Customization: Available
• Condition: New
• Certification: CE, RoHS, GS, ISO9001
• Model NO.: 0133506
• Standard: DIN, ASTM, GOST, GB, JIS, ANSI, BS
• Customized: Customized
• Material: Alloy
• Application: Metal Recycling Machine, Metal Cutting Machine, Metal Straightening Machinery, Metal Spinning Machinery, Metal Processing Machinery Parts, Metal forging Machinery, Metal Engraving Machinery, Metal Drawing Machinery, Metal Coating Machinery, Metal Casting Machinery
• Process: Maching or Casting
• Certificate: BV and ISO 9001
• Roundness: 0.001mm
• Transport Package: Natural Package
• Specification: all sizes
• Trademark: BPS
• Origin: China
• HS Code: 84139100
• Production Capacity: 10000 PCS/Month
• Package Size: 1000.00cm * 800.00cm * 800.00cm
• Package Gross Weight: 100.000kg

Product Description

Cutting

Blanking is the initial stage in the forging process, where raw materials (e.g., steel ingots, bars, plates) are cut or segmented into specific sizes and shapes to prepare for subsequent forging operations (e.g., upsetting, punching, die forging).
Saw Cutting: Ideal for high-precision, large-cross-section materials (e.g., alloy steel). Provides clean cuts but lower efficiency.
Flame Cutting: Used for large billets (e.g., thick plates). Cost-effective but requires post-processing of the heat-affected zone.
Shearing: High-speed method suitable for soft metals (e.g., aluminum, mild steel). May produce burrs on the cut edge.
Laser/Plasma Cutting: High precision and automation, ideal for complex-shaped blanks.
Breaking: Used for brittle materials (e.g., cast iron). Fast but requires controlled fracture surfaces.

Heating 

Heating is a critical step in the forging process, where raw materials (billets, bars, or ingots) are heated to a specific temperature to improve plasticity and reduce deformation resistance. Proper heating ensures optimal metal flow during forging and enhances mechanical properties.
Enhance Plasticity: Reduce yield strength for easier deformation.
Minimize Cracking: Prevent material fractures during forging.
Improve Microstructure: Promote uniform grain structure for better mechanical properties.
Carbon Steels: 1,100–1,250°C
Alloy Steels: 1,150–1,300°C
Aluminum Alloys: 350–500°C
Titanium Alloys: 850–1,100°C

Forging

Forging is a thermo-mechanical metal forming process that shapes heated or room-temperature metal billets using localized compressive forces (hammers, presses, or dies). It enhances mechanical properties by:

a) Open-Die Forging

Process: Deformation between flat dies with manual positioning
Advantage: Flexible for large/simple shapes
Example: Ship propeller shafts >10 tons
b) Closed-Die Forging

Process: High-pressure forming in engraved dies
Advantage: Tight tolerances (±0.3mm)
Example: Automotive connecting rods
c) Precision Forging

Process: Near-net-shape with minimal draft angles
Advantage: Reduces machining by >70%
Example: Aerospace fan blades

Machining

Machining of forged components is a critical post-forging process to achieve final dimensional accuracy, surface finish, and functional features. It bridges the gap between forged near-net-shape parts and end-use requirements.

Quality Control
First Article Inspection: CMM verification of critical dimensions
Surface Integrity Check: White light interferometry for roughness
NDT Requirements: Dye penetrant testing after machining
Cost Optimization Tips
Tooling: Use indexable inserts with multi-layer coatings (TiAlN/AlCrN)
Fixturing: Magnetic chucks for thin-walled forgings
Coolant: High-pressure through-tool cooling (≥70 bar)

Heat treatment

Heat treatment is an essential post-forging process that optimizes the mechanical properties of forged components through controlled heating and cooling cycles. It enhances strength, toughness, and dimensional stability while relieving internal stresses.

Key Objectives

Adjust Hardness/Toughness Balance (e.g., quench & temper)

Refine Grain Structure for improved fatigue resistance
Relieve Residual Stresses from forging deformation
Achieve Material-Specific Properties (e.g., case hardening for wear resistance)

Hardness Testing: Rockwell/Brinell at multiple locations
Microstructure Analysis: Grain size per ASTM E112
NDT Methods: Ultrasonic testing for quench cracks

Packaging

 Packaging Objectives

Packaging is the final critical step in the forging supply chain, ensuring parts reach customers without damage while preventing corrosion during storage/transportation. Proper packaging combines protection, traceability, and handling efficiency

Physical Protection – Prevent dents/scratches during transit
Corrosion Prevention – Inhibit rust in humid/salty environments
Traceability – Maintain batch/lot number visibility
Handling Optimization – Enable safe loading/unloading (weight/balance considerations)

Forging Materials Selection & Application Guide

This reference table provides detailed specifications for common forging materials, including grade standards, forging temperature ranges, key properties, and typical applications to support design selection and process development. Proper material selection matched with optimal processing ensures forged component performance while controlling costs.

Carbon Steels	AISI 1018	1100-1250°C	Good weldability, low cost	Gears, shafts, hydraulic fittings	Automotive, General Machinery
	AISI 1045	1050-1200°C	High strength, heat treatable	Crankshafts, connecting rods	Automotive, Energy
	AISI 1060	1000-1150°C	Excellent hardness retention	Railway wheels, heavy-duty tools	Rail, Construction
Alloy Steels	4140	1050-1200°C	High fatigue strength	Aircraft landing gear, drill collars	Aerospace, Oil & Gas
	4340	1000-1150°C	Superior toughness	Turbine shafts, vehicle parts	Aerospace, Defense
	8620	1100-1250°C	Case-hardening capability	Gears, camshafts, bearing races	Automotive, Heavy Equipment
Stainless Steels	304/304L	1150-1260°C	Corrosion resistance	Valves, food processing equipment	Chemical, Food Processing
	316/316L	1100-1230°C	Enhanced corrosion/acid resistance	Marine hardware, pharmaceutical equipment	Marine, Medical
	17-4PH	1050-1150°C	Precipitation hardening	Pump shafts, aircraft fittings	Aerospace, Chemical
Aluminum Alloys	6061	400-480°C	Lightweight, good strength	Aircraft fittings, bicycle frames	Aerospace, Transportation
	7075	350-450°C	High strength-to-weight ratio	Aerospace structural components	Aerospace, Defense
Titanium Alloys	Ti-6Al-4V (Grade 5)	850-950°C	High strength, biocompatibility	Jet engine components, medical implants	Aerospace, Medical
Nickel Alloys	Inconel 718	950-1120°C	Extreme temperature resistance	Turbine blades, rocket engine parts	Aerospace, Energy
	Monel K500	900-1050°C	Corrosion resistance in seawater

Xiamen Bluesea Piping Systems Co., Ltd (BPS) – Your Trusted Forging Partner

Since 2009, BPS has been a professional manufacturer of high-quality forgings, including forged rings, shafts, cylinders, discs, and standard/non-standard flanges in carbon steel, stainless steel, duplex steel, and alloy steel. With a strong reputation for reliability, we have successfully supplied products to Fortune 500 companies worldwide.

Manufacturing Excellence

Factory Size: 8,000m with 5 specialized workshops (free-forging, ring rolling, machining, heat treatment, and painting)
Annual Capacity: 8,000 tons of high-precision forgings
Key Equipment: 4,500T press, CNC lathes, ring rolling machines, and heat treatment furnaces
Product Applications
Our forgings are widely used in oil & gas, petrochemical, power generation, shipbuilding, industrial machinery, and turbine manufacturing.

Certifications & Quality Assurance

ISO 9001, PED, TUV AD2000-WO certified
Strict inspections (including third-party) with full material traceability
Global Reach
We export to South America (Chile, Peru), Europe (Turkey, Poland, Belgium, Netherlands), and Asia (South Korea, Vietnam, Indonesia), earning long-term trust from our customers.

Service Commitment

Quick quotations & flexible order support
Comprehensive documentation (quality certificates, shipping files)
Custom solutions for OEM & industrial applications

FAQ

Q: Are you a manufacturer or trading company?
A: We are a professional forging manufacturer with our own factory.
 
Q: Can you produce custom forgings?
A: Yes, we accept customized orders based on your specifications.
 
Q: What's your quality control process?
A: We implement strict QC from material inspection to final product testing.
 
Q: How can I get product information?
A: Contact us for catalogs, drawings and technical specifications.
 
Q: What about after-sales service?
A: We provide full quality guarantee and technical support after delivery.