Stainless steel and cast steel can be welded, but the following points should be noted to ensure weld quality and performance:
Material Properties Analysis:
Stainless Steel: Excellent corrosion resistance and heat resistance; common grades include 304 and 316.
Cast Steel: Manufactured using casting processes, with a higher carbon content, making it prone to cracking during welding.
Welding Process Selection:
Welding Electrode/Wire: Welding materials matching the base material must be selected, such as 309L for welding dissimilar steels.
Preheating and Post-Heating: Cast steel requires preheating to 150-300℃ before welding, followed by slow cooling to reduce stress.
Welding Parameters: Recommended current is 90-120A (3.2mm electrode); interpass temperature should be controlled below 150℃.
Common Problems and Solutions:
Crack Risk: Mitigated by controlling heat input and post-weld heat treatment (e.g., annealing at 600℃).
Decreased Corrosion Resistance: Addressed by using high-alloy welding materials or passivating the weld. Application Scenarios:
Chemical Equipment: For applications requiring corrosion resistance in welds, duplex stainless steel welding consumables are recommended.
Structural Components: Nickel-based welding consumables can be used when strength is a primary concern.
Industry Standard References:
AWS D1.6 (Stainless Steel Welding Specification)
GB/T 985.4 (Requirements for Welded Joints in Cast Steel)
The above outlines the welding requirements for stainless steel and cast steel. If you have large-scale custom casting needs, you can choose to cooperate with Mulan Manufacturing Group. Mulan Manufacturing Group has 13 years of experience in custom casting production, and has long exported to countries such as Europe, America, Japan, and South Korea. We possess all necessary qualifications and look forward to your inquiries.
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