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20X13L steel

20Cr13L Steel

Steel 20Cr13L: a classifier of steels and alloys. Below is systematized information on the purpose, chemical composition, types of supply, substitutes, critical point temperatures, physical, mechanical, technological and foundry properties for the grade — Steel 20X13L.

General information on steel 20X13L

Delivery type
GOST 2176−77 castings.
Application
The parts exposed to shock loads, as well as products exposed to relatively weak corrosive environments. Steel is corrosion-resistant, martensitic class.

Chemical composition of steel 20X13L

Chemical element %
Silicon (Si) 0.20−0.80
Manganese (Mn) 0.30−0.80
Copper (Cu), not more 0.30
Nickel (Ni), not more than 0.50
Sulfur (S), not more than 0.025
Carbon (C) 0.16−0.25
Phosphorus (P), not more than 0.030
Chrome (Cr) 12.0−14.0

Mechanical properties of steel 20X13L

Mechanical properties at elevated temperatures

t test,°C σ0, 2, MPa σB, MPa δ5, % ψ, %
30 mm castings. Normalization 940−950°C, tempering 740−750°C, air; tempering 940−950°C, oil, tempering 740−750°C, air.
100 385−455 560−630 21−23 57−66
200 355−445 520−600 18−22 55−65
300 360−395 510−540 17−19 51−62
400 335−405 470−530 14−19 51−61
500 300−380 390−465 14−20 52−64

Mechanical properties in sections up to 100 mm

Heat treatment, delivery condition σ0, 2, MPa σB, MPa δ5, % ψ, % KCU, J/m2
Annealed at 950 °C. Tempering at 1050 °C, oil or air. Tempering at 750 °C, air. 450 600 16 40 40

Mechanical properties depending on casting cross-section

Heat treatment, delivery condition Section, mm σ0, 2, MPa σB, MPa δ5, % ψ, % KCU, J/m2 HB
Normalization 940−950°C, tempering 740−750°C, air, quenching 940−950°C, oil; tempering 740−750°C, air.
Specimen cutout location — C 10 390−460 610−680 22−28 51−64 63−117  
Sample cutout location — C 30 415−500 620−670 18−30 61−64 123−166 196−206
Sample cutout location — C 50 385−460 610−650 15−29 22−67 52−131 187−206
Sample cutout location — C 100 430−500 630−670 22−27 45−61 64−108 187−206
Sample cutout location — K 100 440−505 630−690 21−27 40−63 77−117 187−206
Sample cutout location — C 200 540−570 680−710 10−14 20−30 30−52  
Sample cutout location — K 200 495−570 640−730 12−17 19−41 32−60  

Technological properties of steel 20X13L

Weldability
Limited weldability. Welding methods: RDS, ADS under gas protection. Heating and heat treatment are used depending on the type of welding and the purpose of construction.
Cutability
At HB ?170 Kυ of tw.spl. = 1,2, Kυ b.st. = 0,5.

Impact toughness of steel 20X13L

Impact toughness, KCU, J/cm2

Delivery condition, heat treatment -20 -40 -60 -80
30mm castings. Normalization 940−950 C, tempering 740−750 C, air; quenching 940−950 C, oil; tempering 740−750 C, air. 34−74 30−63 10−64 6−62

Physical properties of steel 20X13L

Test temperature, °С 20 100 200 300 400 500 600 700 800 900
Modulus of normal elasticity, E, GPa 222 216 211 203 195 184 167 149 140  
Torsional shear modulus of elasticity G, GPa 87 84 82 79 76 71 64 55 53  
Steel density, pn, kg/m3 7740                  
Thermal conductivity coefficient W/(m — °C) 21 23 24 25 26 27 27 27 28 28
Electrical resistivity (p, nominal value — m) 645 695 775 859 931 985 1055 1115 1125 1160
Test temperature,°C 20−100 20−200 20−300 20−400 20−500 20−600 20−700 20−800 20−900 20−1000
Coefficient of linear expansion (a, 10−6 1/°C) 10.0 10.8 11.3 11.7 12.1 12.4 12.6 12.8 10.8  
Specific heat capacity (C, J/(kg -°C)) 470 491 512 533 563 596 643 680 693  

Casting properties of steel 20X13L

Temperature at the beginning of solidification, °C 1489−1497
Linear shrinkage, % 2.2−2.3
Crack resistance, Kt.y. 0.6
Fluidity, Kj.t. 1.0
Shrinkage shell formation tendency, K.r. 0.8
Propensity to formation of shrinkage porosity, Q.p. 1.0