What material is 1.4021 X20Cr13?
Aug 21, 2025
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What is 1.4021 stainless steel?
DIN 1.4021 stainless steel, also known as X20Cr13, is a martensitic stainless steel with a high carbon content (0.16-0.25%) and a high chromium content (12-14%). This composition gives it excellent mechanical properties, including high strength and hardness after tempering, as well as good corrosion resistance. It is often used in applications requiring a combination of strength, hardness, and moderate corrosion resistance.
What is 1.4021 material ASTM equivalent?
| DIN EN X20Cr13 (1.4021) Material Equivalent | |||||||||
| European Union | US | ISO | China | Japan | |||||
| Standard | Steel Name (Material Number) | Standard | Grade (UNS) | Standard | Grade (ISO number ) | Standard | Grade | Standard | Grade |
| EN 10088-2; EN 10088-3; EN 10088-1 |
X20Cr13 (1.4021) | AISI; ASTM A240/A240M; ASTM A276/A276M; ASTM A959 |
AISI 420 (UNS S42000) |
ISO 15510 | X20Cr13 (4021-420-00-I) | GB/T 1220; GB/T 3280 |
2Cr13; 20Cr13 (New designation) | JIS G4303; JIS G4304 |
SUS 420J1 |
What is the composition of X20Cr13?
| Chemical Composition, % | |||||||
| Standard | Steel Grade (Steel Number) | C | Si, ≤ | Mn, ≤ | P, ≤ | S, ≤ | Cr |
| EN 10088-2; EN 10088-3 |
X20Cr13 (1.4021) | 0,16-0,25 | 1,00 | 1,50 | 0,040 | 0,015 | 12,0-14,0 |
EN 1.4021 Stainless Steel Mechanical Properties
| Mechanical Properties | |||||||||||
| Country (Region) | Standard | Steel Grade (Steel Number) | Product Condition | Heat treatment condition | Thickness (mm), ≤ | Hardness, HRB (HBW or HV) | 0,2 % yield strength, Mpa (ksi), ≥ | Tensile strength, Mpa (ksi) | Elongation, %, ≥, (long. + tr.) | Impact energy (ISO-V), KV2 >10mm thick, ≥ J | Rockwell Hardness, HRC (HV) |
| European Union | EN 10088-2 | X20Cr13 (1.4021) | cold rolled strip | +QT | 3 | – | – | – | – | – | 44-50 (440-530) |
| cold rolled strip | +A | 8 | 95 (225) | – | 700 (101), ≤ | 15 | – | – | |||
| Hot rolled strip | +A | 13,5 | |||||||||
| Hot rolled plate | +QT650 | 75 | – | 450 (65) | 650-850 (94-123) | 12 | by agreement | – | |||
| Hot rolled plate | +QT750 | 550 (80) | 750-950 (108-137) | 10 | |||||||
| Notes: +A: Annealed, +QT: Quenched and Tempered. |
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Corrosion Resistance:
1.4021 offers good resistance to various media, including non-chlorine-containing environments like organic acids, soaps, and solvents, as well as steam and freshwater. However, it's not suitable for highly corrosive environments like marine or chloride-rich conditions.
EN 1.4021 Heat Treatment Conditions:
QT700:
Hardening at 950-1050°C (1742-1922°F) and tempering at 650-750°C (1202-1382°F).
QT800:
Hardening at 950-1050°C (1742-1922°F) and tempering at 600-700°C (1112-1292°F).
Is 1.4021 magnetic?
1.4021 stainless steel is a martensitic grade of stainless. It is magnetic and hardenable with rust resistant properties.
What material is 1.4021 QT800?
EN 1.4021 +QT800 steel is EN 1.4021 stainless steel in the quenched and tempered condition. It has the highest strength compared to the other variants of EN 1.4021 stainless steel.
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