UGI 4418 AIR QT1150

UGI 4418 AIR QT1150 introduction

UGI 4418 AIR stainless steel is a low-carbon super-martensitic grade with the addition of nickel. It is specifically designed for the aerospace market. It combines high mechanical strength with excellent resilience and very good corrosion resistance, considerably higher than those of conventional high-carbon Fe-Cr-C martensitic steels. This grade exhibits excellent cryogenic properties.


In the quenched and tempered state, the UGI 4418 AIR microstructure consists predominantly of tempered martensitic (see figure on the right side of the material page). It may contain traces of ferrite (less than 5%) and residual austenite, depending on the diameter and the heat treatments used.


The microcleanliness guarantees are as follows (rating as per ASTM E45/method A):




Grades

Epit (mV/ECS) ± 20 mV




1.4006 (AISI 410)
185


1.4307 (AISI 304L) (with S=0.02%)
400


1.4542 (17-4-PH AISI 630)
380


1.4418
375




UGI 4418 AIR is also available in an electro-slag-remelted (ESR) version.


UGI 4418 AIR is magnetizable.

Equivalent material: EN 1.4418, EN X4CrNiMo16-5-1, DIN 1.4418, DIN X4CrNiMo16-5-1, ISO 4418-431-77-E, AFNOR Z8CND17-04

UGI 4418 AIR QT1150 general

Property Value
Density Density of 7.7 g/cm³

UGI 4418 AIR QT1150 thermal

Property Value Comment
Coefficient of thermal expansion Coefficient of thermal expansion of 0.0000103 1/K 20 to 100°C
- Coefficient of thermal expansion of 0.0000108 1/K 20 to 200°C
- Coefficient of thermal expansion of 0.0000112 1/K 20 to 300°C
- Coefficient of thermal expansion of 0.0000116 1/K 20 to 400°C
Specific heat capacity Specific heat capacity of 430 J/(kg·K) -
Thermal conductivity Thermal conductivity of 15 W/(m·K) -

UGI 4418 AIR QT1150 chemical

Property Value Comment
Carbon Carbon of 0.06 max.
Chromium Chromium of 15.0 - 17.0 % -
Copper Copper of 0.5 max.
Manganese Manganese of 1.5 max.
Molybdenum Molybdenum of 0.8 - 1.2 % -
Nickel Nickel of 4.0 - 5.0 % -
Nitrogen Nitrogen of 0.02 % min.
Phosphorus Phosphorus of 0.03 max.
Silicon Silicon of 0.6000000000000001 max.
Sulfur Sulfur of 0.005 max.

UGI 4418 AIR QT1150 electrical

Property Value
Electrical resistivity Electrical resistivity of 8e-07 Ω·m

UGI 4418 AIR QT1150 mechanical

Property Temperature Value Comment
Elastic modulus 20 °C Elastic modulus of 200 GPa -
- 100 °C Elastic modulus of 195 GPa -
- 200 °C Elastic modulus of 185 GPa -
- 300 °C Elastic modulus of 175 GPa -
- 400 °C Elastic modulus of 170 GPa -
Elongation - Elongation of 8.0 % min., Transverse
- - Elongation of 14 % min.
Hardness, Brinell - Hardness, Brinell of 341.0 - 401.0 [-] HBW
Tensile strength - Tensile strength of 1150.0 - 1300.0 MPa -
- - Tensile strength of 1150.0 - 1300.0 MPa Transverse

UGI 4418 AIR QT1150 application

Property - -
Application areas
Cold Forming
Corrosion properties Grade Pitting potential
- (mV/ECS at ± 20 mV)
1.4006 (410) 185
1.4307 (304L) 400
1.4542 (17-4PH) 380
UGI 4418 AIR 375

Experience the seamless integration of our steel products into your projects, delivering flawless results every time.

-- Our promise

Similar or equivalent steel materials

Get a quote