Aircraft Carbon Steel BS T45/ 4T45 Tube

Technical Data Sheet


Chemical Composition Limits
Weight% C Si Mn Cr Ni Mo P + S max
4 T45 Tube 0.17-0.25 0.10-0.35 1.30-1.70 0.25 max 0.40 max 0.10 0.040 max

BS T45 is a carbon-manganese steel tube supplied in the hardened and tempered condition. It finds many different applications in both the motorsport and aerospace industries due to its high strength to weight ration. T45 is also weldable, but unlike other chome-moly tube grades does not require heat treating after welding.

Typical Mechanical Properties

Grade Treatment Tensile Strength Rm , N/mm² Proof Strength Rp 0.2, N/mm² Hardness HB Ruling Section
T45 Tube Hardened and Tempered 700-900 620 201-262 max 12.5 mm minimum O.D

Alloy 4 T45 Tube. For all stock availability contact Sales.


BS 4 T45 Tube :1972


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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.