Corrodur 4418 Mod

Alternative and trade names
Super 13Cr, UNS S41426
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Description

Corrodur 4418 Mod exceeds the resistance of standard 13% chrome steel grades such as 1.4006 (AISI 410) and 1.4021 (AISI 420) and is therefore the first choice.

Equivalent Materials

Properties

Dimension

Diameter

d

50 - 280 mm

Mechanical

Charpy impact energy

aK,charpy

108 J at -10 °C

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Charpy impact energy, transverse

aK,charpy,Trans

60 J at -10 °C

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min

Elongation A2

A2

19 % at 23 °C

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Hardness, Brinell

HB

280 [-] at 23 °C

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Hardness, Rockwell C

HRC

27 [-] at 23 °C

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Reduction of area

Z

50 % at 23 °C

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min

Tensile strength

Rm

724 - 964 MPa at 20 °C

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Tensile strength, transverse

Rm,trans

758 MPa at 23 °C

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Yield strength Rp0.2

Rp0.2

655 MPa at 20 °C

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Yield strength Rp0.2, transverse

Rp0.2,trans

586 MPa at 23 °C

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Chemical properties

Element

Weight %

Comment

Fe

-

Balance

Cr

11.5 - 13.5 %

Ni

4.5 - 6.5 %

Mo

1.5 - 3 %

Mn

0.5 %

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Technological properties

Application areas

Completion tools

Certifications

According to NACE MR0175 Annex B 2.3. and NORSOK M-650

Corrosion properties

No hint on intergranular corrosion acc. to ASTM A 262 Prac. A (left) and Prac. E (right). The Oxalic Acid Etch Test carried out acc. for Prac. A showed no step, ditch or dual structure. Material for Prac. E was sensitized at 675 °C, kept in boiling, acidified CuSO4 for 15 h and then bent to 180°. No cracks were visible on the bent area.

This material data has been provided by Deutsche Edelstahlwerke Specialty Steel (DEW).

All metrics apply to room temperature unless otherwise stated. SI units used unless otherwise stated.
Equivalent standards are similar to one or more standards provided by the supplier. Some equivalent standards may be stricter whereas others may be outside the bounds of the original standard.