DTD 5222 Structural and constructional steels

Material group: Ferrous Alloys / Structural and constructional steels

Country / Standard: United Kingdom / DTD

Data updates

Latest Update: 2020-09

Total number of updates: 1

Update History

This material has 32 properties — only a subset is shown here.

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DTD 5222 Chemical Composition

CRITERIA

VALUE

UNIT

CAS NUMBER

CRITERIA

VALUE

0.38 – 0.43

UNIT

CAS NUMBER

7440-44-0

CRITERIA

VALUE

4.75 – 5.25

UNIT

CAS NUMBER

7440-47-3

CRITERIA

VALUE

0.20 – 0.40

UNIT

CAS NUMBER

7439-96-5

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7439-98-7

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7723-14-0

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7704-34-9

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-21-3

CRITERIA

VALUE

val1

UNIT

CAS NUMBER

7440-62-2

D.T.D. 5222: 1969 / 5 Per Cent Chromium - Molybdenum - Vanadium Steel Suitable for Forged Bolts (180 hbar) (Vacuum re-melted - limiting ruling section 25 mm)

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DTD 5222 Physical Properties

Temperature

0 - 30°C

PROPERTY / VALUE

Modulus of Elasticity

190 — 210 GPa

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Density

7.67 — 7.86 kg/dm³

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Poisson Coefficient

0.27 — 0.3

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This material has 32 properties — only a subset is shown here.

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DTD 5222 Heat Treatments

Annealing: Heat for not less than 1 hour at a temperature between 820°C and 880°C and cool at a rate not exceeding 25°C per hour down to below 540°C and then cool to room temperature.
Hardening: Heat at a temperature of 1050°C ± 10°C for not less than 15 minutes, or 15 minutes for each 25 mm of section, whichever is the greater, and cool in air.
Tempering: Heat at a temperature of 525°C ± 10°C for not less than 2 hours and cool in air, then re-heat at a temperature of 575°C ± 10°C for not less than 6 hours and cool in air.

DTD 5222 Mechanical Properties

Temperature

0 - 30°C

PROPERTY / VALUE

Tensile Strength

1807 — 2008 MPa

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Brinell Hardness (HB)

≤ 223

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Elongation, A

≥ 6 %

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Reduction of Area

val1 %

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Vickers Hardness (HV)

val1

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Yield Strength, Rp0.2

val1 MPa

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9Cross References

8Composition
11Mechanical Properties
3Physical Properties
1Heat Treatment
-Metallography
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