X20Cr13 + QT800 Stainless Steel Bar

what is X20Cr13 + QT800 Stainless Steel Bar?

X20Cr13 + QT800 (1.4021) is a martensitic stainless steel bar with a composition similar to the AISI 420 grade. This material undergoes a quenching and tempering treatment (QT800) to achieve a tensile strength of at least 800 MPa. It features high strength, hardenability, and magnetic properties, along with moderate corrosion resistance; it is frequently utilized in the manufacture of engineering components that require both durability and excellent wear resistance.

 

GNEE, with over 20 years of experience in specialty steel manufacturing and export, is committed to supplying high-quality X20Cr13 (1.4021 / 2Cr13) QT800 quenched and tempered stainless steel bars. All products are manufactured in strict accordance with EN, DIN, and other international industrial standards.

We offer a full range of 1.4021 round bars, flat bars, square bars, and forged bars, with customizable lengths and various surface treatment options including peeling and grinding. All products are certified by ISO 9001, SGS, and BV, and are supplied with EN 10204 3.1 Material Test Certificates.

 

Our X20Cr13 QT800 bars are produced through controlled heat treatment processes, including quenching (920–1050°C oil cooling) and tempering (600–750°C), ensuring an optimal balance between strength and toughness, along with excellent dimensional stability and minimal deformation. The 1.4021 +QT800 bars feature high hardness and outstanding wear resistance, making them superior to grades such as 304 and 316 in applications like shafts, valves, and pump components.

420 Stainless Steel (X20Cr13 / 1.4021 / UNS S42000) Specification

Standard / Category	Details
EN / DIN	X20Cr13 / 1.4021
AISI / ASTM	420 (High Carbon Variant)
JIS	SUS420J1
UNS	S42000
Product Forms	Round Bar, Square Bar, Hexagonal Bar, Flat Bar
Diameter (Round)	8 mm to 500 mm
Surface Finish	Black (Hot Rolled), Peeled, Ground, Polished (h8 / h9 / h11)
Length	3000 mm – 6000 mm (Fixed or Random)
Testing	100% Ultrasonic Testing (UT), Eddy Current Testing (on request), PMI
Certifications	MTC EN 10204 3.1, ISO 9001:2015

 

1.4021 Chemical Composition (Typical Weight %) According to EN 10088-3

Element	Carbon (C)	Silicon (Si)	Manganese (Mn)	Phosphorus (P)	Sulfur (S)	Chromium (Cr)
Min	0.16	-	-	-	-	12.00
Max	0.25	1.00	1.50	0.040	0.030*	14.00

*Note: Sulfur levels may be lower for improved polishability or higher for free-machining variants.

 

 1.4021 stianless steel bar Mechanical Properties (+QT800 Condition)

Property	Value (Metric)	Value (Imperial)
Tensile Strength (Rm)	800 – 950 MPa	116 – 138 ksi
Yield Strength (Rp0.2)	≥ 600 MPa	≥ 87 ksi
Elongation (A5)	≥ 12 %	≥ 12 %
Impact Energy (ISO-V)	≥ 20 J	≥ 15 ft-lb
Hardness (Brinell)	245 – 300 HBW	-

 

 X20Cr13 stianless steel Heat Treatment Specification (+QT800)

Process	Temperature (°C)	Cooling Method
Hardening	950 – 1050 °C	Oil or Air
Tempering (+QT800)	600 – 700 °C	Air
Soft Annealing	745 – 825 °C	Furnace or Air
Hot Forming	1100 – 800 °C	Slow cooling

 

What is the difference between 1.4021 +QT800 and 1.4021 +QT700?

The difference between 1.4021 +QT800 and 1.4021 +QT700 is the minimum tensile strength, with QT800 indicating a higher minimum tensile strength than QT700, although both are EN 1.4021 stainless steel in the quenched and tempered condition. The number following "+QT" designates the minimum yield strength in MPa after quenching and tempering, so QT800 signifies a higher minimum yield strength than QT700.

 

What is the density of X20Cr13 stainless steel bars?

The density of X20Cr13 (1.4021) stainless steel bars at room temperature typically ranges from 7.70 to 7.80 g/cm³ (kg/dm³). This martensitic stainless steel is widely utilized in the manufacturing of components requiring both corrosion resistance and high strength,such as steam turbine blades, fasteners, and cutting tools.

What is the hardness of X20Cr13 / 1.4021 stainless steel bars?

In the quenched and tempered condition, the hardness of X20Cr13/1.4021 (AISI 420) stainless steel bars typically ranges from 44 to 50 HRC, or 440 to 530 HV. In the annealed condition, however, the hardness is lower,typically below 230 HB, or 225 HB/HV.

 

Are 1.4021 stainless steel bars magnetic?

Yes, 1.4021 (AISI 420) stainless steel bars are strongly magnetic. As a martensitic stainless steel, this material retains its magnetism in all conditions-including the annealed state as well as the heat-treated (quenched/tempered) state.

 

Delivery condition
For hot forged bar, usually the delivery condition is hot forged, annealed/solid solution, rough turned/Black surface.
For hot rolled bar, usually the delivery condition is hot rolled, annealed/solid solution, Black surface.
For hot rolled plate, usually the delivery condition is hot rolled, annealed/solid solution, black surface.
For cold drawn bar, usually the delivery condition is cold drawn, annealed/QT, peeled/black surface

End Protection: Larger diameter round bars are fitted with plastic caps at the ends to prevent end-face impact and scratches to other bars.

Desiccant: An oxygen absorber/desiccant is placed inside the wooden crate or sealed packaging to absorb condensation inside the shipping container and prevent rust spots on the 1.4021 material.

Waterproof Paper: The packaging is lined with a polyethylene (PE) waterproof film or kraft paper.