STAINLESS STEELS


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Stainless Steels
Stainless Steels
Stainless Steels

Stainless steels are a group of steels that contain at least 10.5% chromium. The addition of this element, along with a wide variety of others, generally improves corrosion resistance and mechanical properties.

Smiths stock all of the main stainless steel types including duplex, super duplex, precipitation hardening, maraging and aerospace specifications.

Nearest Equivalent Specification

Available Products

301

A high strength austenitic stainless steel that has good ductility properties when cold worked. Corrosion resistance is excellent and it can be easily welded.

EN
UNS

1.4310
S30100

302

A tough austenitic stainless steel with superior corrosion resistance to grade 301 and a slightly higher carbon content than 304. It is non-magnetic and is not affected by heat treatment.

EN
UNS

1.4319
S30200

303

An austenitic stainless steel that has very good machinability but reduced formability. It is not recommended for any application involving welding and has a lower resistance to corrosion than 1.4301.

EN
UNS

1.4305
S30300

304/304L

An austenitic stainless steel containing 18% chrome and 8% nickel. Excellent welding and forming properties with useful resistance to corrosion (if welding use 304L). Machinability is reasonable.

EN UNS

1.4301/6
S30400/3

316/316L

An austenitic stainless steel with added molybdenum to improve corrosion resistance (better than 304) particularly in chloride environments. Use 316L for welding applications.

EN
UNS

1.4401/4
S31600/3

321

A variation of the basic austenitic stainless steel 1.4301 (304) with the addition of titanium as a stabiliser. It is resistant to intergranular corrosion and can be easily welded and formed.

EN
UNS

1.4541
S32100

347

A multi-purpose austenitic stainless steel with excellent heat and corrosion resistance. Better mechanical properties than grade 304 make it suitable for many arduous high temperature applications.

EN
UNS

1.4550
S34700

410

A commonly used martensitic stainless steel with excellent hardness properties after heat treatment making it suitable for highly stressed parts. It has limited corrosion resistance and weldability is poor

EN
UNS

1.4006
S41000

416

The addition of sulphur to this martensitic stainless steel gives it the best machining properties of any stainless steel. However, this comes at the cost of reduced corrosion resistance, formability & weldability.

EN
UNS

1.4005
S41600

430

A simple ferritic stainless steel with good corrosion resistance. Often used in chemical processing due to its particular resistance to nitric acid. Formability is good but it does not respond to heat treatment.

EN
UNS

1.4016
S43000

431

A heat treatable martensitic stainless steel that contains nickel. It has high tensile and torsional strength and is well suited to shaft manufacture. Welding is poor and it cannot be easily cold worked.

EN
UNS

1.4057
S43100

Super austenitic stainless steel. Highly alloyed (6% molybdenum) with good strength and excellent corrosion resistance in marine and industrial environments. Enhanced resistance to pitting and crevice corrosion.

EN
UNS

1.4547
S31254