DIN 1.4021 Stainless Steel X20Cr13 Material Properties Equivalent Composition

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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 <t ≤ 40 850 (123) 290 500 (72) 700-950 (101-138) 10 25
40 <t≤ 63 800 (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 <d ≤ 1,00 1100 (160) 10
1,00 < d≤ 3,00 1050 (152) 10
3,00 <d≤ 5,00 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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