400 Series (Ferritic and Martensitic) Stainless Steel

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Grade Designation and Composition For 400 Series Stainless Steel Header

European Designation EN 10088-2 2005 Former BS Standard American European Designations chemical composition (% weight)
Number Name BS 1554 1990 nearest fit AISI nearest fit ASTM UNS nearest fit C (max) Si (max) Mn (max) P (max) S (max) Cr Ni Ti Mo Other
MARTENSITIC
1.4006 X12 Cr 13 410S21 410 S 41000 0.08 – 0.15 1.00 1.50 0.04 0.015 11.50 – 13.50 0.75 - -
1.4028 X30 Cr 13 420S45 420 S 42000 0.26 – 0.35 1.00 1.50 0.04 0.015 12.00 – 14.00 - - -
FERRITIC
1.4016 X6 Cr 17 430S17 430 S 43000 0.05 – 0.15 1.00 1.00 0.04 0.015 16.00 – 18.00 - - -

Mechanical Properties Annealed For 400 Series Stainless Steel Header

European Designation EN 10088-2 2005 Former BS Standard American Maximum tensile strength N/mm²
Number Name BS 1554 1990 nearest fit AISI nearest fit ASTM UNS nearest fit Wire dia
13.0 – 6.0mm
Wire dia
6.00 – 1.50mm
Wire dia
1.50 – 0.50mm
Wire dia
0.50 – 0.10mm
MARTENSITIC
1.4006 X12 Cr 13 410S21 410 S 41000 700 700 750 780
1.4028 X30 Cr 13 420S45 420 S 42000 780 780 800 820
FERRITIC
1.4016 X6 Cr 17 430S18 430 S 43000 610 620 630 650

Applications Header

European Steel Designation AISI Nearest fit Service Properties Applications
MARTENSITIC
1.4006 410 Can be hardened by heat treatment and therefore has a wide range of mechanical properties. It has low resistance to corrosion when compared with austenitic grades, but this is balanced by a low cost. This grade strongly responds to a magnetic field. Springs, clips.
X12 Cr 13
1.4028 420 Properties very similar to those of 1.4006, this grade, with increased Carbon content, has improved potential hardness and wear / abrasion resistance. Springs, knives and cutting edges generally, doctor blades and similar printing industry wear and scraping applications.
X30 Cr 13
FERRITIC
1.4016 430 Lower Chrome and the absence of Nickel result in a lower work hardening rate (than austenitic grades) – resulting in a lower breaking strength. Most often used in the annealed (soft) condition this grade has good formability and moderate corrosion resistance. Responds strongly to a magnet. It is significantly lower cost than the austenitic grades. Can only be hardened by cold work. Screws, bolts, wire shapes
X6 Cr 16

Wire Stockists

Knight Precision Wire is part of Knight Group, a group of companies that specialise in the processing and supply of precision metals. Quality is of the utmost importance and Knight Precision Wire operates a vigorous quality management system.

People outside the wire industry may be unaware of the sheer number of wire variations out there. Wire is an essential commodity in numerous sectors and appears in many different forms. Sectors that KPW supply wire for include the Aerospace, Medical, Petrochemical, Industrial and Heat Treatment industries. For the aerospace sector, KPW have been approved as aerospace wire suppliers by Rolls Royce, British Aerospace and Westlands. Two of the primary products supplied to the aerospace industry are locking wire and aerospace cable. You can see case study examples of how the services provided by KPW have benefited the different sectors on the website.

Below is a list of the different wire products offered by KPW :

  • Stainless Steel
  • Carbon Steel
  • Nickel & Nickel Alloys
  • Copper & Copper Alloys
  • Special Wire Materials

Visit the stainless wire product page to see more information about the different stainless wires we produce. To see all of KPW's steel wires products then visit the products page.

In addition to providing wire products to many different companies and sectors, KPW also offer wire processing services. These services include :

  • Cut to Length Wire
  • Flat Wire
  • Square and Shaped Wire
  • Stranding and Bunching
  • Rewinding and Spooling
  • Polishing & Cleaning

To find out how KPW can help you with your special wire needs, send an enquiry using the form on the contact page.