DIPTI METAL INDUSTRIES
Dipti Metal Industries (A KMR Group Company) is the primary ER420 Supplier and ER420 Stockist of premium martensitic stainless steel welding consumables in Mumbai, India. ER420 is a high-carbon technical filler metal engineered for welding alloys of similar composition (AISI 420). It is highly sought after for applications requiring high hardness, superior edge retention, and the ability to be polished to a mirror finish. As a premier ER420 Exporter, we supply certified TIG rods to plastic injection molders, cutlery manufacturers, and surgical instrument producers across 75+ countries.
As a leading ER420 Supplier in Mumbai, we address the specialized needs of the tool and die industry. The higher carbon content in ER420 filler metal compared to 410 allows the weld deposit to achieve working hardnesses exceeding 50 HRC after proper heat treatment. This makes it the definitive choice for repairing damaged plastic injection molds, where the weld must match the parent metal’s hardness and polishability to ensure no visible "witness marks" on finished plastic parts.
Crucial: ER420 is highly hardenable and sensitive to cracking. Pre-heating (200-300°C) and Post-Weld Heat Treatment (PWHT) are mandatory for structural integrity.
| Element | Typical Range |
|---|---|
| Carbon (C) | 0.25 - 0.40 |
| Chromium (Cr) | 12.0 - 14.0 |
| Manganese (Mn) | 0.60 Max |
| Silicon (Si) | 0.50 Max |
| Nickel (Ni) | 0.60 Max |
| Molybdenum (Mo) | 0.75 Max |
| Property | Typical Value |
|---|---|
| Tensile Strength | ≥ 650 MPa (94 ksi) |
| Yield Strength | ≥ 450 MPa (65 ksi) |
| Elongation (%) | ≥ 15% (Annealed) |
| Hardness (Heat Treated) | 50 - 54 HRC |
Certified to AWS A5.9 ER420. Supplied with full 3.1 Mill Test Certification and Heat Traceability.
Maintaining metallurgical purity for high-spec tooling projects:
Shipping premium ER420 TIG rods from Mumbai port to global industrial hubs.
Headquarters & Global Hub
Dipti Metal Industries (A KMR Group Company)
No.9, Shreepati Castle, D-1, 10–11th Khetwadi Back Road, Mumbai – 400004, India
Phone: +91-22-66381301
WhatsApp: +91-9975266499