Product: High corrosion resistance, wear resistance, stable performance corrosion resistant castings
MOQ: 1 piece
Model NO: Customized
Size: As Drawing
Machining tolerance: +/-0.01mm
Application: Chemical Industry, Marine Engineering, Petroleum, Pharmaceutical Equipment Use
Material: Stainless Steel (304, 316L), Hastelloy, Monel Alloy, Nickel-Chromium Alloy, Cast Iron with Anti-Corrosion Coating
Surface Treatment: Passivation, Pickling, Anti-Corrosion Coating, Electropolishing
Manufacturing Process: Precision Casting, Sand Casting, Investment Casting, Centrifugal Casting
Plant: We Have Our Own Factory
After-sales Service: Support in 24h
Warranty: Offered (12 Months Under Normal Working Conditions)
Certification: CE, ISO 9001:2015, API (Petroleum Grade)
Standard: ASME, ASTM, GB, JIS
Inspection: UT (Ultrasonic Testing), RT (Radiographic Testing), Corrosion Resistance Test, Metallographic Inspection
Application: Used in chemical reactors, marine fittings, petroleum pipelines, pharmaceutical equipment, wastewater treatment equipment, etc.
Color: Silver (Stainless Steel), Gray (Alloy Cast Iron), Custom Anti-Corrosion Coating Colors
Delivery Time: 10 - 40 days / negotiable
Transport Package: Steel Frame, Wooden Cases with Moisture-Proof & Anti-Corrosion Film
Advantage: Rich Casting Experience, Professional Material Selection Guidance, Customized Solutions, Strict Quality Control
Our Photos Corrosion Resistant Castings:
(Image Placeholder: Stainless steel corrosion resistant casting finished product; Marine corrosion resistant casting installation scene; Corrosion resistance test process; Metallographic structure of Hastelloy castings)
Key Principles for Choosing Corrosion Resistant Castings
The core of selecting corrosion resistant castings is to match the material performance with the working environment (corrosion medium, temperature, pressure), and comprehensively consider structural design, manufacturing process and cost. The following are the core selection criteria:
1. Material Selection Based on Corrosion Medium
The type of corrosion medium directly determines the material of castings, which is the primary factor for scientific selection:
- Neutral medium (fresh water, air, weak acid/alkali): 304 stainless steel castings (Cr 18-20%, Ni 8-12%) are preferred, with good general corrosion resistance and cost-effectiveness;
- Strong corrosive medium (salt water, sulfuric acid, hydrochloric acid): 316L stainless steel (added Mo 2-3%) or Hastelloy, which can resist pitting corrosion and intergranular corrosion, suitable for marine and chemical environments;
- High-temperature corrosive medium (above 500℃): Nickel-chromium alloy castings, with stable chemical properties at high temperature, avoiding oxidation and corrosion;
- Low-temperature corrosion environment (below -20℃): Monel alloy castings, maintaining toughness and corrosion resistance without brittle fracture.
2. Structural Design Adaptation
Reasonable structural design can avoid local corrosion and improve service life:
- Avoid dead corners and gaps: Prevent medium accumulation and cause crevice corrosion (e.g., round corner transition instead of right angle);
- Uniform wall thickness: Avoid uneven corrosion caused by uneven stress and temperature distribution;
- Drainage structure: For liquid medium scenarios, design drainage ports to reduce medium retention time;
- Avoid galvanic corrosion: When matching with other metals, select materials with similar electrode potentials or use insulation pads.
3. Manufacturing Process Selection
Different processes affect the compactness and corrosion resistance of castings:
- Precision casting/investment casting: Suitable for complex-shaped castings, with dense structure and smooth surface, reducing corrosion points;
- Centrifugal casting: Suitable for cylindrical castings (pipes, sleeves), high density, strong resistance to pressure corrosion;
- Post-processing optimization: Passivation and pickling remove surface oxides, forming a dense protective film; electropolishing improves surface finish and corrosion resistance.
Limitations of Common Materials
- 304 stainless steel: Poor resistance to chloride ion corrosion, not suitable for marine and salt-containing environments;
- Hastelloy/Monel alloy: High corrosion resistance but high cost, not suitable for general working conditions;
- Coated cast iron: Low cost, but the coating is easy to fall off in high impact and high temperature environments, losing corrosion resistance.
Applicable Scenarios Matching
| Corrosion Environment |
Recommended Material |
Applicable Products |
| Marine (salt water, humidity) |
316L Stainless Steel, Hastelloy |
Marine fittings, ship hull components |
| Chemical Industry (strong acid/alkali) |
Hastelloy, Nickel-Chromium Alloy |
Reactors, storage tanks, pipelines |
| Petroleum (oil, gas, sulfide) |
API Standard Stainless Steel, Monel Alloy |
Oil well casings, pipeline fittings |
| Pharmaceutical (clean, weak acid) |
316L Stainless Steel (Electropolished) |
Pharmaceutical equipment, containers |
| Wastewater Treatment (sewage, chemicals) |
Coated Alloy Cast Iron, 304 Stainless Steel |
Sewage pumps, treatment tanks |
Reference Standard Nominal Chemical Composition (%)
| Standard/Alloy Grade |
C ≤ |
Cr |
Ni |
Mo |
Cu |
Fe |
Other Elements |
| 304 (ASTM A351) |
0.08 |
18.0-20.0 |
8.0-12.0 |
—— |
—— |
Balance |
—— |
| 316L (ASTM A351) |
0.03 |
16.0-18.0 |
10.0-14.0 |
2.0-3.0 |
—— |
Balance |
—— |
| Hastelloy C276 |
0.01 |
14.5-16.5 |
54.0-60.0 |
15.0-17.0 |
1.0-2.0 |
4.0-7.0 |
W 3.0-4.5 |
| Monel 400 |
0.15 |
≤0.50 |
63.0-67.0 |
—— |
28.0-34.0 |
≤2.0 |
—— |
| ZG20Cr13 (GB/T 2100) |
0.16-0.24 |
11.5-13.5 |
≤0.60 |
—— |
—— |
Balance |
Si ≤1.0, Mn ≤1.0 |
FAQ
Q: Can you provide material selection guidance for specific corrosion environments?
A: Yes, we can. Our technical team will recommend the most suitable material and process according to your corrosion medium, temperature, pressure and other working conditions.
Q: Do you provide free samples for corrosion resistance testing?
A: Yes, usually we provide free samples for testing under the condition of freight paid by customer.
Q: What is the Warranty for our products?
A: If any quality problems (corrosion failure caused by material or process) occur on our side during the warranty period, we will take on the shipping cost and replacement.
Q: Can the products be customized as our need, such as special structural design?
A: Surely our products can be customized as your need. We can design and produce according to your drawings, samples and special working condition requirements.
Q: What information do we need to provide to confirm the order?
A: Provide us your drawings, detailed specifications, corrosion medium type, working temperature/pressure, and any special performance requirements.
Q: Do you test all your goods before delivery?
A: Yes, we have 100% test before delivery, including corrosion resistance test, dimensional inspection and non-destructive testing.
Q: Transportation?
A: Transported by DHL, UPS, EMS, Fedex, Air freight, Sea freight. We will use anti-corrosion packaging to avoid damage during transportation.
Q: Do you support drop shipping?
A: Yes, your drop shipping is available.
Q: What kind of materials are used for the products?
A: We supply various corrosion resistant materials, including stainless steel (304, 316L), Hastelloy, Monel alloy, nickel-chromium alloy, and coated cast iron, etc.
Q: What kinds of products do you offer?
A: We mainly produce various corrosion resistant castings, such as chemical reactor components, marine fittings, petroleum pipeline fittings, pharmaceutical equipment parts, wastewater treatment equipment castings, etc.
- 20-year Foundry Operation Experience, focusing on corrosion resistant castings R&D and production.
- Friendly & High Efficient Technical & Commercial Communication, providing professional material selection guidance.
- Professional Export Practices: Exported to +60 Overseas Countries, familiar with international corrosion resistance standards.
[everest_form id="249"]
[carousel_slide id='765']
Your message must be between 20-3,000 characters!
