DIN 1.4021 (AISI 420 / X20Cr13 / UNS S42000) Stainless Steel Supplier, Manufacturer & Global Exporter – Dipti Metal Industries

Dipti Metal Industries, based in Mumbai, India, is a trusted DIN 1.4021 (AISI 420 / X20Cr13) Martensitic Stainless Steel Supplier, Manufacturer, Exporter, Stockist & Dealer. Founded in 2009, we have established a strong international presence, exporting stainless steel products to 56+ countries under the brand “DIPTI”, backed by ISO certification and global approvals.

🌍 Origin: India
⚓ Export Loading Ports: Nhava Sheva (JNPT), Mundra, Kandla, Hazira, Chennai, Vizag, Cochin, Kolkata

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🔹 About DIN 1.4021 (AISI 420 Stainless Steel)

DIN 1.4021, also referred to as AISI 420 / UNS S42000 / EN X20Cr13, is a martensitic stainless steel known for:

• High hardness and wear resistance (up to ~52 HRC after heat treatment)

• Moderate corrosion resistance in mildly aggressive environments

• Excellent polishability, ideal for cutlery, surgical instruments, and precision tools

• Good heat-treatability – can be annealed, quenched, and tempered for required mechanical properties

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🌍 International Equivalents

• DIN / EN: X20Cr13 (1.4021)

• AISI / ASTM: 420 (Type 420A/C)

• UNS: S42000

• JIS: SUS 420J1

• BS: 420S37

• AFNOR (France): Z20C13

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🧪 Chemical Composition (Typical %)

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⚙️ Mechanical Properties

• Tensile Strength (Rm): 650 – 850 MPa

• Yield Strength (Rp0.2): ≥ 440 MPa (quenched & tempered)

• Elongation (A5): ≥ 15%

• Hardness: 200 HB (annealed) → 50–52 HRC (quenched & tempered)

• Density: 7.7 – 7.8 g/cm³

• Magnetic: Yes, strongly magnetic (martensitic structure)

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📐 Physical Properties

• Elastic Modulus: ~200 GPa

• Thermal Conductivity: ~25 W/m·K

• Thermal Expansion: ~10.2 × 10⁻⁶/K

• Melting Range: 1450 – 1510 °C

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📑 Standards & Specifications (Product-wise)

DIN 1.4021 Sheets, Plates & Coils

• ASTM A240 / ASME SA240, EN 10088-2

• Hot-rolled, cold-rolled, polished finishes (2B, BA, No.1, No.4)

DIN 1.4021 Bars & Rods

• ASTM A276, ASTM A479

• Round, square, hex, bright, forged, ground bars

DIN 1.4021 Pipes & Tubes

• ASTM A312 / A213, EN 10216-5

• Seamless, welded, ERW, EFW

DIN 1.4021 Pipe Fittings

• ASTM A403, DIN EN 10222-5, MSS SP-43

• Elbows, tees, reducers, stub ends, end caps

DIN 1.4021 Flanges

• ASTM A182 / ASME SA182, EN 1092-1, JIS B2220

• Weld neck, slip-on, blind, socket weld, threaded, lap joint

DIN 1.4021 Fasteners

• ASTM A193 / A194, DIN 931 / 933 / 934 / 975

• Bolts, nuts, washers, screws, studs, threaded rods

DIN 1.4021 Valves & Gaskets

• ASTM A182, API 600/602, EN 12516, ISO 5208

• Gate, globe, check, ball valves, spiral wound and flat gaskets

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🏭 Product Supply Range – DIN 1.4021

• DIN 1.4021 Sheets, Plates & Coils

• DIN 1.4021 Pipes & Tubes (Seamless, Welded)

• DIN 1.4021 Bars & Rods (Bright, Forged, Ground)

• DIN 1.4021 Pipe Fittings (Buttweld & Forged)

• DIN 1.4021 Flanges (WN, SO, BL, SW, Threaded, Lap Joint)

• DIN 1.4021 Fasteners (Bolts, Nuts, Screws, Studs, Washers)

• DIN 1.4021 Valves & Gaskets

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🛠 Applications

• Cutlery & Kitchenware

• Surgical Instruments & Medical Tools

• Pump Shafts & Valve Components

• Automotive & Mechanical Parts

• Springs, Screws, and Wear-Resistant Components

• Tool Inserts & Industrial Blades

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🌍 Global Export Reach

We supply and export DIN 1.4021 Stainless Steel worldwide:

• North America: USA, Canada, Mexico

• Europe: UK, Germany, France, Italy, Spain, Poland

• Middle East: UAE, Saudi Arabia, Oman, Qatar, Kuwait

• Asia-Pacific: Japan, Singapore, South Korea, China, Australia

• South Asia: Bangladesh, Nepal, Sri Lanka

• South America: Brazil, Argentina, Chile

• Africa: South Africa, Nigeria, Egypt, Kenya

⚓ Export Ports from India: Nhava Sheva, Mundra, Kandla, Hazira, Chennai, Vizag, Cochin, Kolkata

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✅ Certifications & Quality

• ISO 9001:2015 Certified

• EN 10204 3.1 / 3.2 Material Test Certificates

• PED & NACE MR0175 Compliant

• Third-party inspections: TÜV, SGS, BV, DNV

• 100% traceability with heat numbers

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❓ Frequently Asked Questions (FAQ)

Q1: What is DIN 1.4021 also known as?
A: AISI 420, UNS S42000, EN X20Cr13, SUS 420J1.

Q2: Can DIN 1.4021 be hardened?
A: Yes, it can be quenched and tempered to achieve 50–52 HRC.

Q3: Is DIN 1.4021 stainless steel magnetic?
A: Yes, it is strongly magnetic in all conditions.

Q4: What are its applications?
A: Cutlery, surgical tools, pump shafts, valves, automotive parts, and wear-resistant components.

Q5: How does it compare to DIN 1.4301 (304)?
A: DIN 1.4021 has higher hardness and wear resistance, while 1.4301 offers superior corrosion resistance.

Q6: Do you offer custom sizes and machining?
A: Yes, we provide cut-to-size plates, custom bars, forged fittings, and machined components.

Q7: What certifications are supplied?
A: ISO, EN 10204 MTCs, PED, NACE, TÜV, SGS, BV, DNV.