420F, UNS S42020, X30Cr13, 1.4028, Z33C13 martensitic stainless steel corrosion resistant hardening and tempering steel according to AMS 5620, ASTM A582, GE S-400, S-1000, EN 10088-1
420F, UNS S42020, X30Cr13, 1.4028, Z33C13 - Introduction and Application
420F martensitic stainless hardening and tempering steel, containing an average of 13% of chromium, mainly distinguished by the carbon content in the chemical composition and thus the higher endurance properties, it is identical to 420 stainless steel but with an addition of sulfur to dramatically improve the machinability. This alloy has excellent corrosion properties when hardened and offers good ductility in the annealed condition. This grade is used in similar applications to 420 but where complex geometries require good machining requirements such as dental and surgical equipment, manufacture of shafts, glands, drops, valves, bolts, springs, piston rods, machine parts, molds for pressurized castings, knives and tools used in the food and household industries in the form of rods.
Hot Working
The hot working of 420F, UNS S42020, X30Cr13, 1.4028, Z33C13 martensitic stainless steel is performed by gradually increasing temperature to 760°C (1400°F), then further to 1097-1204°C (2000-2200°F). Later it is cooled slowly in the furnace so as to prevent cracking. Reheating has to be performed often to maintain the working temperature above 871°C (1600°F).
Cold Working
420F, UNS S42020, X30Cr13, 1.4028, Z33C13 martensitic stainless steel can withstand only minor cold working. Radical forming will cause cracking.
Melted process
AOD
420F, UNS S42020, X30Cr13, 1.4028, Z33C13 - Chemical composition WT %
Grade
Chemical Composition WT %
C:
Mn:
Si:
P:
S:
Cr:
Ni:
Mo:
Cu:
420F, UNS S42020
0.20 - 0.40
Max 1.00
Max 1.50
Max 0.04
0.20-0.40
11.50 - 14.0
Max 1.00
Max 0.50
X30Cr13, 1.4028
0.26 - 0.35
Max 1.5
Max 1.0
Max 0.04
Max 0.03
12.0 - 14.0
X29CrS13, 1.4029
0.25 - 0.32
Max 1.5
Max 1.0
Max 0.04
0.015 - 0.025
12.0 - 13.5
-
Max 0.6
-
Z33C13
0.28 - 0.38
Max 1.0
Max 1.0
Max 0.04
0.015 - 0.030
12.0 - 14.0
-
-
-
3H14
0.26 - 0.35
Max 0.8
Max 0.8
Max 0.04
Max 0.03
Min 14.0
Max 0.6
-
-
420S45
0.28 - 0.36
Max 1.0
Max 1.0
Max 0.04
Max 0.03
12.0 - 14.0
Max 1.0
-
-
30Ch13, 30Kh13, 30Х13
0.26 - 0.35
Max 0.8
Max 0.8
Max 0.03
Max 0.025
12.0 - 14.0
Max 0.6
-
Max 0.3
Mechanical Property of 420F, UNS S42020, X30Cr13, 1.4028, Z33C13
Properties
Metric
Imperial
Tensile strength
655 MPa
95000 psi
Yield strength (@strain 0.200%)
380 MPa
55100 psi
Elastic modulus
190-210 GPa
27557– 30458 ksi
Poisson's ratio
0.27-0.30
0.27-0.30
Elongation at break (in 50 mm)
22%
22%
Hardness, Brinell
220
220
Hardness, Rockwell C (converted from Brinell hardness, value below normal Rockwell C hardness range, for comparison only)
18
18
Mechanical properties of 420F, UNS S42020, X30Cr13, 1.4028, Z33C13 in heat-treated state +QT
Tensile strength, Rm: 800 - 1000 MPa
Yield point, Re: Min 600 MPa
Elongation, A: Min 10%
HRC Hardness: 45-51
HV Hardness: 450 - 550
Tharmal capacity, c-1
Thermal conductivity coefficient, λ: 30 W * m-1
Modulus of elasticity, E: 215 GPa
Linear Expansion Factor, α: 10,5 * 10-1
mechanical properties in annealed condition A
HB Hardness: Max 235 HB
HV Hardness: Max 235 HB
HRB Hardness: Max 97 HB
Yield point, Re: Max 740 MPa
Elongation, A: Min 15%
Density: 7,72 g / cm3
Mechanical properties of smooth bars, drawn wires, cold rolled strips
Mechanical properties of products +1C, +1E, +1D, +1X, +1G, +2D in +A condition
HBW Hardness: Max 245
Tensile strength, Rm: Max 800 MPa
Mechanical properties of smooth bars +2H, +2B, +2G, +2P in +A
Dimensions Max 16mm
Tensile strength, Rm: Max 950 MPa
HB Hardness: Max 305 HB
Dimensions 16-40mm
Tensile strength, Rm: Max 900 MPa
HB Hardness: Max 280 HB
Dimensions 40-63mm
Tensile strength, Rm: Max 840 MPa
HB Hardness: Max 260 HB
Dimensions 63-160mm
Tensile strength, Rm: Max 840 MPa
HB Hardness: Max 260 HB
Mechanical properties of +2D wires in +A
Dimensions 0.5 - 1.0mm
Tensile strength, Rm: Max 1100 MPa
Elongation, A: Min 10%
Dimensions 1.0 - 3.0mm
Tensile strength, Rm: Max 1050 MPa
Elongation, A: Min 10%
Dimensions 3.0 - 5.0mm
Tensile strength, Rm: Max 1000 MPa
Elongation, A: Min 10%
Dimensions Min 5mm
Tensile strength, Rm: Max 950 MPa
Elongation, A: Min 15%
Mechanical properties of products +1C, +1E, +1D, +1X, +1G, +2D in +QT850
Tensile strength, Rm: 850 - 1000 MPa
Yield point, Re: Min 650 MPa
Elongation, A: Min 10%
Impact resistance, KV20℃: Min 12J
Mechanical properties of smooth bars +2H, +2B, +2G, +2P in +QT850
Dimensions Max 10mm
Tensile strength, Rm: 900 - 1050 MPa
Yield point, Re: Min 700 MPa
Dimensions 10-16mm
Tensile strength, Rm: 900 - 1150 MPa
Yield point, Re: Min 650 MPa
Dimensions 16-40mm
Tensile strength, Rm: 850 - 1100 MPa
Yield point, Re: Min 650 MPa
Dimensions 40-63mm
Tensile strength, Rm: 850 - 1050 MPa
Yield point, Re: Min 650 MPa
Dimensions 63-160mm
Tensile strength, Rm: 850 - 1000 MPa
Yield point, Re: Min 650 MPa
Mechanical properties of +2H wires in +QT850 condition with dimensions Min 0.05mm
Condition +C500 - Rm: 500 - 700 MPa
Condition +C600 - Rm: 600 - 800 MPa
Condition +C700 - Rm: 700 - 900 MPa
Condition +C800 - Rm: 800 - 1000 MPa
Condition +C900 - Rm: 900 - 1100 MPa
Condition +C1000 - Rm: 1000 - 1250 MPa
Condition +C1100 - Rm: 1100 - 1350 MPa
Condition +C1200 - Rm: 1200 - 1450 MPa
Condition +C1400 - Rm: 1400 - 1700 MPa
Condition +C1600 - Rm: 1600 - 1900 MPa
Condition +C1800 - Rm: 1800 - 2100 MPa
Mechanical properties of coldrolled stripes according to EN 10151
Condition +C700 - Rm: 700 - 850 MPa
Condition +C850 - Rm: 850 - 1000 MPa
Condition +A - Rm: 540 - 740 MPa
Modulus of elasticity in delivery,E= 210 GPa
Modulus of elasticity after cold rolling and heat treatment, E= 220 GPa
Mechanical properties at elevated temperatures
Properties
Temperatures
100℃
200℃
300℃
400℃
Linear Expansion Factor, α
* 10-1
10.5
11.0
11.5
12.0
Modulus of elasticity, E
GPa
212
205
200
190
Physical Property of 420F, UNS S42020, X30Cr13, 1.4028, Z33C13
Properties
Metric
Imperial
Density
7.80 g/cm3
0.282 lb/in³
Heat Treatment of 420F, UNS S42020, X30Cr13, 1.4028, Z33C13
Annealing at 843-900°C (1550-1650°F), followed by slow furnace cooling.
Hardening at 950 - 1050℃ with oil or air cooling
Tempering at 625 - 675℃
Softening annealing at 745 - 825 ℃ with air cooling
Rolling and forging at 1100 - 800 ℃
Welding of 420F, UNS S42020, X30Cr13, 1.4028, Z33C13
420F, UNS S42020, X30Cr13, 1.4028, Z33C13 martensitic stainless steel stainless steel is basically not welded as it has air hardening characteristics. However, welding can be performed after preheating to 149-204°C (300-400°F) with post-weld tempering for 2 h. The filler metal used has to be AWS E/ER420.
Machining of 420F, UNS S42020, X30Cr13, 1.4028, Z33C13
420F, UNS S42020, X30Cr13, 1.4028, Z33C13 martensitic stainless steel has good machinability due to the presence of sulfur.
Equivalent grades of 420F, UNS S42020, X30Cr13, 1.4028, Z33C13
420F, UNS S42020, X30Cr13, 1.4028, Z33C13, SUS 420J2, 3CR13, 1.4028, X30CR13, X29CRS13, 1.4029, 30CR13, X33CR13, Z33C13, Z30C13, CSN 17023, 3CH13, 30CR130, 420S45, 420 S 45, 3H14, UNS S42080, 30CH13, 30KH13, 30Х13, AISI 420B