Stainless Steel 440b (WS 1.4112)

Technical Data Sheet

Chemical Composition Limits
Weight % C S Cr Mo Vanadium Fe


0.03 max 17-19 0.90-1.30 0.07-0.12 Rem
Other Chemically similar Specifications
Weight % C S Cr Mo Vanadium Fe
WS 1.4112 0.85-0.95 0.03 max 17-19 0.90-1.30 0.07-0.12 Rem
X 90 CrMoV 18 0.85-0.95 0.03 max 17-19 0.90-1.30 0.07-0.12 Rem
AISI 440B~ 0.85-0.95 0.03 max 17-19 0.90-1.30 0.07-0.12 Rem

Alloy 440B Stainless Steel is a high carbon chromium steel which is manufactured in rod, bar and coil. (AISI 440B ~ Stainless Steel). For all stock and size availability contact Sales.

Material Properties
This steel is designed to provide stainless properties with excellent hardness. In some respects it behaves similarly to tool steel. Chronifer M 17B resists corrosion from mild atmospheres, fresh water steam, ammonia, many petroleum products and organic materials and several mild acid environments.

Coils: Cold drawn 10-35kg coil
Bars Ø 0-1.99mm: Cold drawn and polished
Bars Ø 2.00-40mm: Cold drawn, ground and polished
Bars Length : 2m or 3m. Surface roughness N5-N6

Standard Tolerances
Diameter: h7
Out of roundness/cylindricity :1/2 of dia tolerance
Tolerance in length : +50/-0mm

Corrosion Resistance
This grade is used in the hardened and tempered condition for a good corrosion resistance. For optimum, corrosion resistance, surfaces must be free of scale and foreign particles.

Heat Treatment
Soft annealing: 750-800ºC
Slow furnace cooling (2-4 hours)
Hardening: 1000-1080ºC
Max obtainable hardness 57-59 HRC

Cutting Rate
20-35m/min (approx value, depending on the lubrication oil, the cutting tools, the shape of parts)

Stock Range
Standard dimensions from Ø 0.80 to 24.00mm with many intermediate dimensions.

At Aircraft Materials we specialise in the rapid turn-around of orders, with most stock items ready for shipping out the same day to anywhere in the world. For time-critical orders, such as AOGs use our AOG service desk (, the team are dedicated to processing and dispatching orders on the same day, even for cutting orders on bar and sheet products.

Our expertise in global logistics enables us to source material from anywhere in the world in a matter of days and provide fast shipping solutions to all our customers, whichever country they are in. We use a range of transport partners to ship overnight within the UK and Europe, and offer a full range of logistics solutions from priority express services to more cost-effective economy shipments all around the globe. To find out more about our services click here.

Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.