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DIN 1.4021 Stainless Steel (X20Cr13 Material)
The following tables summarize DIN 1.4021 stainless steel properties, and specifications including chemical composition, mechanical properties, hardness, heat treatment, etc.
Chemical Composition
X20Cr13 material chemical composition is listed in the following table based on cast analysis.
| 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 |
Notes: For 1.4021 stainless steel bars, rods, wires, sections, bright products and related semi-finished products, the content of S is ≤0,030%. A specific range of sulfur content can provide specific performance improvements. For machinability, it is recommended and allowed to control the sulfur content between 0.015% and 0.030%. For weldability, it is recommended and allowed to control the sulfur content between 0.008% and 0.030%. In order to improve the polishing performance, it is recommended to control the sulfur content to a maximum of 0.015%.
Physical Properties
DIN EN 1.4021 stainless steel physical properties are listed in the table below such as density, melting point, specific heat, electrical resistivity, elastic modulus (modulus of elasticity), thermal conductivity, and coefficient of thermal expansion (CTE).
Notes:
- 10-6·K-1 = 10-6/K
- 1 Ω·mm²/m = 1 μΩ·m
- 1 g/cm3 = 1 kg/dm3 = 1000 kg/m3
- 1 GPa = 1 kN/mm2
- 1 MPa = 1 N/mm2
| Physical Properties | |
| Density, g/cm3 (lb/in3) | 7,7 (0.278) |
| Magnetic | Yes |
| Specific heat capacity, J/(Kg·K) | 460 at 20 °C (68 °F) |
| Electrical resistivity, μΩ·m | 0,60 at 20 °C (68 °F) |
| Modulus of elasticity, GPa (103 ksi) | 215 (31.2) at 20 °C (68 °F) |
| 212 (30.7) at 100 °C (212 °F) | |
| 205 (29.7) at 200 °C (392 °F) | |
| 200 (29) at 300 °C (572 °F) | |
| 190 (27.5) at 400 °C (752 °F) | |
| Thermal conductivity, (W/m·K) | 30 at 20 °C (68 °F) |
| Mean coefficient of thermal expansion, (10-6/K) | 10,5 at 20-100 °C (68-212 °F) |
| 11,0 at 20-200 °C (68-392 °F) | |
| 11,5 at 20-300 °C (68-572 °F) | |
| 12,0 at 20-400 °C (68-752 °F) | |
DIN EN 1.4021 Stainless Steel Mechanical Properties
DIN EN 1.4021 stainless steel mechanical properties are given in the datasheet below including tensile strength, yield strength, elongation, reduction in area, Brinell and Rockwell hardness, etc.
| 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. | |||||||||||
| Mechanical properties at room temperature of heat-treated 1.4021 steel in conditions 1C, 1E, 1D, 1X, 1G and 2D | ||||||||
| Standard | Steel Grade (Steel Number) | Thickness (t) or diameter (d) in mm (in.) | Heat treatment condition | Hardness, HBW | 0,2 % proof strength, Mpa (ksi), ≥ | Tensile strength, Mpa (ksi) | Elongation, %, ≥, (long.) | Impact energy (ISO-V), KV2, ≥ J (long.) |
| EN 10088-3 | X20Cr13 (1.4021) | – | +A | 230 | – | 760 (110), ≤ | – | – |
| ≤ 160 (6.3) | +QT700 | – | 500 | 700-850 (101-123) | 13 | 25 | ||
| +QT800 | – | 600 | 800-950 (116-138) | 12 | 20 | |||
| Notes: Diameter: Width across flats for hexagons. Hardness: Only for guidance. For rods, only the tensile strength values apply. | ||||||||
| Mechanical properties for bright bars at room temperature of heat-treated martensitic steels in conditions 2H, 2B, 2G or 2P | |||||||||
| Standard | Steel Grade (Steel Number) | Thickness (t) or diameter (d), mm | Annealed | Quenched + tempered | |||||
| Tensile strength, Mpa (ksi), ≤ | Hardness, HB, ≤ | Heat treatment condition | 0,2 % yield strength, Mpa (ksi), ≥ | Tensile strength, Mpa (ksi) | Elongation in 5mm min, %, ≥, (long.) | Impact energy (ISO-V), KV2, ≥ J (long.) | |||
| EN 10088-3 | X20Cr13 (1.4021) | ≤ 10 (only for rounds) | 910 (132) | 290 | +QT700 | 600 (87) | 750-1000 (109-145) | 8 | – |
| 10 < t≤ 16 | 910 (132) | 290 | 550 (80) | 750-1000 (109-145) | 8 | – | |||
16 | 850 (123) | 290 | 500 (72) | 700-950 (101-138) | 10 | 25 | | |||
40 | 800 (116) | 250 | 500 (72) | 700-900 (101-130) | 12 | 25 | | |||
| 63 < t ≤ 160 | 760 (110) | 230 | 500 (72) | 700-850 (101-123) | 13 | 25 | |||
| Mechanical properties at room temperature of annealed wire in 2D condition | ||||
| Standard | Steel Grade (Steel Number) | Nominal dimension (d) mm | Tensile strength, Mpa (ksi), ≤ | Elongation, %, ≥ |
| EN 10088-3 | X20Cr13 (1.4021) | 0,50 | 1100 (160) | 10 | |
| 1,00 < d≤ 3,00 | 1050 (152) | 10 | ||
3,00 | 1000 (145) | 10 | | ||
| 5,00 < d ≤ 16,00 | 950 (138) | 15 | ||
| If skin passed (i. e. less than 5 % reduction in cross section), the maximum tensile strength might be increased by up to 50 MPa | ||||
| Proof strength at elevated temperatures | ||||
| Standard | Steel name (Material number) | Heat treatment condition | Temperature, °C ( °F) | 0,2% proof strength, Mpa (ksi), ≥ |
| EN 10088-2 | X20Cr13 (1.4021) | +QT650 | 100 (212) | 420 (61) |
| 150 (302) | 410 (59) | |||
| 200 (392) | 400 (58) | |||
| 250 (482) | 385 (56) | |||
| 300 (572) | 365 (53) | |||
| 350 (662) | 335 (48) | |||
| 400 (752) | 305 (44) | |||
| Minimum values for the 0,2 % proof strength of martensitic steels at elevated temperatures | ||||
| Standard | Steel name (Material number) | Temperature, °C ( °F) | 0,2% proof strength, MPa, ≥ | |
| +QT650 | +QT800 | |||
| EN 10088-3 | X20Cr13 (1.4021) | 100 (212) | 460 (66) | 515 (74) |
| 150 (302) | 445 (64) | 495 (71) | ||
| 200 (392) | 430 (62) | 475 (69) | ||
| 250 (482) | 415 (60) | 460 (66) | ||
| 300 (572) | 395 (57) | 440 (64) | ||
| 350 (662) | 365 (53) | 405 (59) | ||
| 400 (752) | 330 (48) | 355 (51) | ||
Heat Treatment
The following contents give DIN 1.4021 stainless steel heat treatment temperature of including annealing, hot forming, quenching and termpering, etc.
| Guidelines on the temperatures for hot forming and heat treatment of DIN 1.4021 martensitic steel | |||||||||
| Standard | Steel Grade (Steel Number) | Hot forming | Heat treatment symbol | Annealing | Quenching | Tempering Temperature, °C (°F) | |||
| Temperature, °C (°F) | Type of cooling | Temperature, °C (°F), ① | Type of cooling | Temperature, °C (°F), ① | Type of cooling | ||||
| EN 10088-2 | X20Cr13 (1.4021) | slow cooling | +A | 730 to 790 (1350-1455) | – | – | – | – | |
| +QT | – | – | 950 to 1050 (1745-1925) | oil, air | 200 to 350 (395 to 665) | ||||
| +QT650 | – | – | 950 to 1010 (1745-1850) | 700 to 780 (1295-1440) | |||||
| +QT750 | – | – | 620 to 700 (1150-1295) | ||||||
| EN 10088-3 | +A | 745 to 825 (1375-1520) | air | – | – | – | |||
| +QT700 | – | – | 950 to 1050 (1745-1925) | oil, air | 650 to 750 (1200-1380) | ||||
| +QT800 | – | – | 600 to 700 (1110-1290) | ||||||
| Notes: +A: Annealed +QT: Quenched and Tempered ①: If the heat treatment is performed in a continuous furnace, it is generally preferred that the upper limit of the specified range or even exceed the specified range. | |||||||||
Applications
Structural parts of higher strength, such as axles, shafts, pump parts, piston rods, valve cones, nozzle needles, propellers.
DIN 1.4021 Equivalent Material
SS 1.4021 stainless steel equivalent to US ASTM AISI SAE, ISO, Japanese JIS and Chinese GB standard (For reference).
| 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 |
Related materials: 304 Stainless Steel, SAE AISI 1080 Steel, SAE AISI 1018, SS304, 18/8 Stainless Steel
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