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Industries · Defence

High-strength steels for the defence industry

We supply alloy quenched and tempered and case-hardening steels, as well as steel castings, for shafts, pins, gears and housings that need high strength and toughness.

Material Selection

Which part, which material?

In defence applications, parts must work reliably under sudden impact, high stress and wide temperature ranges. That is why nickel-chromium-molybdenum alloy steels are the most common choice; the material and documentation requirements are set out in the specification for each project.

Part

Highly stressed shafts, pins and fasteners

Material group

Quenched and tempered steels

Combines high strength with toughness.

Example grades

34CrNiMo6 (SAE 4340)42CrMo4 (SAE 4140)50CrMo4 (SAE 4150)

Part

Gears and power transmission parts

Material group

Case-hardening steels

Hard, wear-resistant surface; shock-absorbing core.

Example grades

17CrNiMo620NiCrMo2 (SAE 8620)

Part

Precision machined parts

Material group

Carbon and free-cutting steels

Chosen according to the strength the application needs.

Example grades

C4511SMn37

Part

Housings and heavy-duty parts

Material group

Steel castings

Strength and toughness; weldable.

Example grades

To drawing

In defence projects, the material specification, standard and documentation requirements are set project by project. State the specification and the documents you need in your quote request; our sales team will confirm compliance.

Grade List

Key grade groups for defence

The grade groups we supply that this industry uses most. If a grade is not listed, just ask.

Quenched and Tempered Steels

25CrMo4 · 1.7218 · SAE 413042CrMo4 · 1.7225 · SAE 414040NiCrMo6 · 1.6565 · SAE 434034CrNiMo6 · 1.6582 · SAE 433741Cr4 · 1.7035 · SAE 5140

Case-Hardening Steels

21NiCrMo2 · 1.6523 · SAE 862016MnCr5 · 1.7131 · SAE 511520MnCr5 · 1.7147 · SAE 512018CrNiMo7-6 · 1.6587 · SAE 4820

What to send for a fast, accurate quote

  • Material specification and standard
  • Documents and tests required
  • Size / drawing and tolerances
  • Quantity and delivery schedule

To see the weight and tonnage in advance, use the weight calculator.

Get a material quote for your defence project

Send us the grade, size and quantity on WhatsApp and your request goes straight to our sales team.