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E: enquiry@qilumetal.com
E: enquiry@qilumetal.com
No. 18 Xiangfu Middle Road,Yuhua District, Changsha City
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420 stainless steel is a type of martensitic stainless steel, known for its moderate corrosion resistance, high strength, and hardness. Due to its excellent machinability, wear resistance, and ability to be heat-treated for enhanced properties. You can find its equivalents in various international standards, such as: X20Cr13/1.4021 from Europe Standard EN 10088-3, 20Cr13/2Cr13 from China Standard GB/T 1220, SUS420J1 from Japan Standard JIS G4303, 20X13 from Russia Standard GOST 5632-76.
1: Steel equivalent
Country | USA | EN | China | Japan | Russia |
Standard | ASTM A276/276M | EN10088-3 | GB/T1220 | JIS G4303 | GOST 5632-76 |
Grade | 420 | X20Cr13/1.4021 | 20Cr13/2Cr13 | SUS420J1 | 20X13/2X13 |
2: Chemical composition
Grade | C | Si | Mn | P | S | Cr | Ni |
420 | 0.15Max | 1.0Max | 1.0Max | 0.040Max | 0.030Max | 12-14 | / |
X20Cr13/1.4021 | 0.16-0.25 | 1.0Max | 1.5Max | 0.040Max | 0.030Max | 12-14 | / |
20Cr13 | 0.16-0.25 | 1.0Max | 1.0Max | 0.040Max | 0.030Max | 12-14 | 0.60Max |
SUS420J1 | 0.16-0.25 | 1.0Max | 1.0Max | 0.040Max | 0.030Max | 12-14 | 0.60Max |
20X13 | 0.16-0.25 | 0.8Max | 0.8Max | 0.030Max | 0.025Max | 12-14 | / |
3: Mechanical properties
Mechanical properties for 20Cr13/2Cr13 from standard GB/T1220 and SUS420J1 from JIS G4303.
Grade | Tensile strength | Yield strength | Alongation | Area of reduction | Impact value at RT/J | Hardness |
20Cr13 | 640Mpa Min | 440Mpa Min | 20% Min | 50% Min | 63J Min | HBW192Max |
SUS420J1 | 640Mpa Min | 440Mpa Min | 20% Min | 50% Min | 78J Min | HBW192Max |
Mechanical properties for X20Cr13/1.4021 from standard EN10088-3.
Steel grade | Size range | HT condition | Tensile strength | Yield strength | Alongation | Impact value at RT/J | Hardness /HBW | ||
L | Tr | L | Tr | ||||||
X20Cr13/1.4021 | A | 760Mpa Max | / | / | / | / | / | 230Max | |
d≤160 | QT 700 | 700-850Mpa | 500Mpa Min | 13% Min | / | 25J Min | / | / | |
QT 800 | 800-950Mpa | 600Mpa Min | 12% Min | / | 20J Min | / | / | ||
A=Annealed; QT=Quenched and tempered
Minimum values for the 0.2% proof strength of martensitic steels at elevated temperatures according to standard EN10088-3.
Steel garde | HT condition | Minimum 0.2% proof strength at a temperature of: | ||||||
100℃ | 150℃ | 200℃ | 250℃ | 300℃ | 350℃ | 400℃ | ||
X20Cr13/1.4021 | Mpa or N/mm2 | |||||||
QT 700 | 460 | 445 | 430 | 415 | 395 | 365 | 330 | |
QT 800 | 515 | 495 | 475 | 460 | 440 | 405 | 355 | |
QT = quenched and tempered
4: Supply size & Tolerance & Stock size
Product type | Size range | Length |
Hot rolled bar | Φ10-Φ130mm | 5000-7000mm |
Hot forged bar | Φ140-Φ600mm | 2000-5800mm |
Hot rolled plate/sheet | T:2-60mm; W:310-810mm | 6000-12000mm |
Hot forged plate | T:70-250mm; W:310-810mm | 2000-5800mm |
Hot Forged block | T: 260-500mm; W: 300-1000mm | 2000-5800mm |
Surface Finish | Turned | Milled | Grinding(Best) | Polished(Best) | Peeled(Best) | Black Forged | Black Rolled |
Tolerance | +0/+3mm | +0/+3mm | +0/+0.05mm | +0/+0.05mm | +0/+0.1mm | +0/+5mm | +0/+1mm |
Straighness | 1mm/1000mm max. | 3mm/1000mm max. | |||||
Qilu steel stock hot rolled bar and forged bars more than ten thousands tons every month, below our our stock size.
1): Stock diameter for hot rolled bar
10 | 12 | 15 | 18 | 20 | 22 | 25 | 28 | 30 | 32 | 35 | 38 | 40 | 45 | 50 |
55 | 60 | 65 | 70 | 75 | 80 | 85 | 90 | 95 | 100 | 105 | 110 | 120 | 130 | 140 |
150 | 160 | 170 | 180 | 190 |
2) : Stock diameter for hot forged bar
200 | 210 | 220 | 230 | 240 | 250 | 260 | 270 | 280 | 290 |
300 | 310 | 320 | 330 | 340 | 350 | 360 | 370 | 380 | 390 |
400 |
Since the stocks change everyday, if you want to know our stock available information, please contact our salesman.
5: Ultrasonic Test
EN10228-3 class III or Sep 1921-84 D/D
6：Steel making & Forging processing
1): Steel making process:
EF+LF+VD
EAF+LF+VD
EF+LF+VD+ESR
EAF+LF+VD+ESR
2): Forging processing:
Hot forging temperature: 800-1100℃. Should not exceed 1100 ℃, in order to prevent grain coarsening and δ ferrite formation.
Slow cooling, cooling in the furnace or in the sand.
7: Heat treatment
Annealed:
Heat 420 steel to 800-900℃
Cooling in the furnace (≤30°C/h) to below 600°C, followed by air cooling. Slow cooling is critical to avoid re-formation of martensite leading to hardness recovery.
Or heat 420 steel to 750℃
Cooling in the furnace or in the air
Quenching and tempering:
Heat 420 steel to 920-980℃
Cooling in the oil
Temper steel at 600-750℃, quick cooling
8：Application
420 stainless steel is a martensitic stainless steel with high hardness, wear resistance and corrosion resistance. Its main application areas are as follows:
1. Knives and Cutting Tools
1) Kitchen knives: kitchen knives, fruit knives, scissors.
2) Medical instruments: scalpels, dental instruments.
3) Industrial knives: paper cutters, razor blades, mold punches.
2. Machinery and industrial parts
1) Bearings and shafts.
2) Pump and valve parts: valve seats, pump shafts,.
3) Molds: plastic molds, die-casting molds.
3. Automotive & Aerospace
1) Fuel system parts: nozzles, fuel pump parts.
2) Aircraft parts: non-load-bearing structural parts (such as fasteners, brackets).
420 stainless steel is a type of martensitic stainless steel, known for its moderate corrosion resistance, high strength, and hardness. Due to its excellent machinability, wear resistance, and ability to be heat-treated for enhanced properties. You can find its equivalents in various international standards, such as: X20Cr13/1.4021 from Europe Standard EN 10088-3, 20Cr13/2Cr13 from China Standard GB/T 1220, SUS420J1 from Japan Standard JIS G4303, 20X13 from Russia Standard GOST 5632-76.
1: Steel equivalent
Country | USA | EN | China | Japan | Russia |
Standard | ASTM A276/276M | EN10088-3 | GB/T1220 | JIS G4303 | GOST 5632-76 |
Grade | 420 | X20Cr13/1.4021 | 20Cr13/2Cr13 | SUS420J1 | 20X13/2X13 |
2: Chemical composition
Grade | C | Si | Mn | P | S | Cr | Ni |
420 | 0.15Max | 1.0Max | 1.0Max | 0.040Max | 0.030Max | 12-14 | / |
X20Cr13/1.4021 | 0.16-0.25 | 1.0Max | 1.5Max | 0.040Max | 0.030Max | 12-14 | / |
20Cr13 | 0.16-0.25 | 1.0Max | 1.0Max | 0.040Max | 0.030Max | 12-14 | 0.60Max |
SUS420J1 | 0.16-0.25 | 1.0Max | 1.0Max | 0.040Max | 0.030Max | 12-14 | 0.60Max |
20X13 | 0.16-0.25 | 0.8Max | 0.8Max | 0.030Max | 0.025Max | 12-14 | / |
3: Mechanical properties
Mechanical properties for 20Cr13/2Cr13 from standard GB/T1220 and SUS420J1 from JIS G4303.
Grade | Tensile strength | Yield strength | Alongation | Area of reduction | Impact value at RT/J | Hardness |
20Cr13 | 640Mpa Min | 440Mpa Min | 20% Min | 50% Min | 63J Min | HBW192Max |
SUS420J1 | 640Mpa Min | 440Mpa Min | 20% Min | 50% Min | 78J Min | HBW192Max |
Mechanical properties for X20Cr13/1.4021 from standard EN10088-3.
Steel grade | Size range | HT condition | Tensile strength | Yield strength | Alongation | Impact value at RT/J | Hardness /HBW | ||
L | Tr | L | Tr | ||||||
X20Cr13/1.4021 | A | 760Mpa Max | / | / | / | / | / | 230Max | |
d≤160 | QT 700 | 700-850Mpa | 500Mpa Min | 13% Min | / | 25J Min | / | / | |
QT 800 | 800-950Mpa | 600Mpa Min | 12% Min | / | 20J Min | / | / | ||
A=Annealed; QT=Quenched and tempered
Minimum values for the 0.2% proof strength of martensitic steels at elevated temperatures according to standard EN10088-3.
Steel garde | HT condition | Minimum 0.2% proof strength at a temperature of: | ||||||
100℃ | 150℃ | 200℃ | 250℃ | 300℃ | 350℃ | 400℃ | ||
X20Cr13/1.4021 | Mpa or N/mm2 | |||||||
QT 700 | 460 | 445 | 430 | 415 | 395 | 365 | 330 | |
QT 800 | 515 | 495 | 475 | 460 | 440 | 405 | 355 | |
QT = quenched and tempered
4: Supply size & Tolerance & Stock size
Product type | Size range | Length |
Hot rolled bar | Φ10-Φ130mm | 5000-7000mm |
Hot forged bar | Φ140-Φ600mm | 2000-5800mm |
Hot rolled plate/sheet | T:2-60mm; W:310-810mm | 6000-12000mm |
Hot forged plate | T:70-250mm; W:310-810mm | 2000-5800mm |
Hot Forged block | T: 260-500mm; W: 300-1000mm | 2000-5800mm |
Surface Finish | Turned | Milled | Grinding(Best) | Polished(Best) | Peeled(Best) | Black Forged | Black Rolled |
Tolerance | +0/+3mm | +0/+3mm | +0/+0.05mm | +0/+0.05mm | +0/+0.1mm | +0/+5mm | +0/+1mm |
Straighness | 1mm/1000mm max. | 3mm/1000mm max. | |||||
Qilu steel stock hot rolled bar and forged bars more than ten thousands tons every month, below our our stock size.
1): Stock diameter for hot rolled bar
10 | 12 | 15 | 18 | 20 | 22 | 25 | 28 | 30 | 32 | 35 | 38 | 40 | 45 | 50 |
55 | 60 | 65 | 70 | 75 | 80 | 85 | 90 | 95 | 100 | 105 | 110 | 120 | 130 | 140 |
150 | 160 | 170 | 180 | 190 |
2) : Stock diameter for hot forged bar
200 | 210 | 220 | 230 | 240 | 250 | 260 | 270 | 280 | 290 |
300 | 310 | 320 | 330 | 340 | 350 | 360 | 370 | 380 | 390 |
400 |
Since the stocks change everyday, if you want to know our stock available information, please contact our salesman.
5: Ultrasonic Test
EN10228-3 class III or Sep 1921-84 D/D
6：Steel making & Forging processing
1): Steel making process:
EF+LF+VD
EAF+LF+VD
EF+LF+VD+ESR
EAF+LF+VD+ESR
2): Forging processing:
Hot forging temperature: 800-1100℃. Should not exceed 1100 ℃, in order to prevent grain coarsening and δ ferrite formation.
Slow cooling, cooling in the furnace or in the sand.
7: Heat treatment
Annealed:
Heat 420 steel to 800-900℃
Cooling in the furnace (≤30°C/h) to below 600°C, followed by air cooling. Slow cooling is critical to avoid re-formation of martensite leading to hardness recovery.
Or heat 420 steel to 750℃
Cooling in the furnace or in the air
Quenching and tempering:
Heat 420 steel to 920-980℃
Cooling in the oil
Temper steel at 600-750℃, quick cooling
8：Application
420 stainless steel is a martensitic stainless steel with high hardness, wear resistance and corrosion resistance. Its main application areas are as follows:
1. Knives and Cutting Tools
1) Kitchen knives: kitchen knives, fruit knives, scissors.
2) Medical instruments: scalpels, dental instruments.
3) Industrial knives: paper cutters, razor blades, mold punches.
2. Machinery and industrial parts
1) Bearings and shafts.
2) Pump and valve parts: valve seats, pump shafts,.
3) Molds: plastic molds, die-casting molds.
3. Automotive & Aerospace
1) Fuel system parts: nozzles, fuel pump parts.
2) Aircraft parts: non-load-bearing structural parts (such as fasteners, brackets).
