Material 1.4021

Stainless steel

The material 1.4021 is a martensitic stainless steel.
Due to its high chromium content, the X20Cr13 achieves good
corrosion resistance in moderately aggressive and non-chlorinated media.
The Pren value is between 12 - 14.
X20Cr13 is suitable for use at temperatures up to 400 C° and can be
polished to a high gloss.

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Standards

HDIN / EN	US-Standard	AFNOR	UNI	JIS	request
X20Cr13	AISI 420 UNS S42000			SUS420J1 SUS420J1FB SUS420J1TKA	request

Material Category: Stainless steel

Applications

Automotive industry

Cutlery industry

Power engineering

Petroleum industry

Petrochemical industry

Hydraulic industry

Mechanical engineering

Heat Treatment

soft annealing 745 - 825 C° , slow furnace cooling, air

tempering :
Hardening 950 - 1050 C° air, polymer, oil
tempering (+QT 700) 650 - 750 C°
Tempering (+QT 800) 600 - 700 C°

Weldability

The material 1.4021 must be heated up to 100°C to 300°C before welding.
After welding, the workpiece must be cooled to a temperature below approx. 120°C before it is tempered at approx. 650°C. Tempering is necessary to ensure ductility. When welding under gas, gas containing hydrogen or nitrogen must not be used, as this has an unfavorable effect on the mechanical properties.

Chemical Composition

C %	Si %	Mn %	P %	S %	Cr %
0,16 - 0,25	max 1,00	max 1,50	max 0,040	max 0,015	12,00 - 14,00

Mechanical Properties

geglüht	Zugfestigkeit (Rm)	Härte [HB 30]
	<= 760 N/mm²	<= 230 HB 30

gehärtet	Zugfestigkeit (Rm)	Härte [HB 30]	Härte [HRC]
	~ 1.570 N/mm²	~ 450 HB 30	~ 47 HRC

vergütet	0,2% Dehngrenze (Rp0,2) bei Temperatur	Zugfestigkeit (Rm)	Bruchdehnung (A 5, 65)	Einschnürung (Z)	Kerbschlagarbeit KV (ISO-V/Charpy-V)	Probenlage
<= 160 mm	>= 500 N/mm²	700 - 850 N/mm²	>= 12 %	>= 50 %	>= 20 Joule	längs
<= 160 mm	>= 600 N/mm²	800 - 950 N/mm²	>= 13 %	>= 50 %	>= 20 Joule	längs
	>= 460 N/mm² / ~ 100 ° C
	>= 515 N/mm² / ~ 100 ° C
	>= 445 N/mm² / ~ 150 ° C
	>= 495 N/mm² / ~ 150 ° C
	>= 430 N/mm² / ~ 200 ° C
	>= 475 N/mm² / ~ 200 ° C
	>= 415 N/mm² / ~ 250 ° C
	>= 460 N/mm² / ~ 250 ° C
	>= 395 N/mm² / ~ 300 ° C
	>= 440 N/mm² / ~ 300 ° C
	>= 365 N/mm² / ~ 350 ° C
	>= 405 N/mm² / ~ 350 ° C
	>= 330 N/mm² / ~ 400 ° C
	>= 355 N/mm² / ~ 400 ° C

angelassen bei 600 - 750 ° C	Zugfestigkeit (Rm)
	700 - 950 N/mm²

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