HR 650 (United Kingdom / B.S.) Material Properties

Material group: Ferrous Alloys / Stainless steels
Country/Standard: United Kingdom / B.S.

Data updates

Latest Update: 2022-02
Total number of updates: 3
Update History:
2020-08 2018-06

Mechanical Properties

Temperature

0 - 30°C
PROPERTY / VALUE
Yield Strength, Rp0.2 val1
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MPa view details
Tensile Strength 900 MPa view details
Elongation, A 12 % view details
Reduction of Area val1
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% view details
Brinell Hardness (HB) 200 view details
Vickers Hardness (HV) val1
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view details
Grain Size val1
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mm view details
Yield Strength, Rp0.2 val1
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MPa view details
Tensile Strength 900 MPa view details
Elongation, A 12 % view details
Reduction of Area val1
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% view details
Brinell Hardness (HB) 200 view details
Vickers Hardness (HV) val1
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view details
Grain Size val1
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mm view details

Physical Properties

Temperature

0 - 30°C
30 - 100°C
100 - 300°C
≥ 300°C
PROPERTY / VALUE
Modulus of Elasticity 190 — 215 GPa view details
Modulus of Elasticity val1
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GPa view details
Modulus of Elasticity val1
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GPa view details
Modulus of Elasticity val1
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GPa view details
Density 7.61 — 8.1 kg/dm³ view details
Poisson Coefficient val1
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view details
Coefficient of Thermal Expansion (CTE) val1
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10-6/°C view details
Coefficient of Thermal Expansion (CTE) val1
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10-6/°C view details
Thermal Conductivity 12.685 W/(m∙°C) view details
Thermal Conductivity val1
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W/(m∙°C) view details
Thermal Conductivity val1
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W/(m∙°C) view details
Thermal Conductivity val1
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W/(m∙°C) view details
Heat Capacity val1
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J/(kg∙°C) view details
Modulus of Elasticity 190 — 215 GPa view details
Modulus of Elasticity val1
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GPa view details
Modulus of Elasticity val1
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GPa view details
Modulus of Elasticity val1
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GPa view details
Density 7.61 — 8.1 kg/dm³ view details
Poisson Coefficient val1
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view details
Coefficient of Thermal Expansion (CTE) val1
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10-6/°C view details
Coefficient of Thermal Expansion (CTE) val1
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10-6/°C view details
Thermal Conductivity 12.685 W/(m∙°C) view details
Thermal Conductivity val1
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W/(m∙°C) view details
Thermal Conductivity val1
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W/(m∙°C) view details
Thermal Conductivity val1
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W/(m∙°C) view details
Heat Capacity val1
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J/(kg∙°C) view details

Composition

CRITERIA
VALUE
UNIT
CAS NUMBER
CRITERIA
Al
VALUE
≤ 0.35
UNIT
%
CAS NUMBER
7429-90-5
CRITERIA
B
VALUE
0.0030 – 0.010
UNIT
%
CAS NUMBER
7440-42-8
CRITERIA
C
VALUE
≤ 0.08
UNIT
%
CAS NUMBER
7440-44-0
CRITERIA
Cr
VALUE
val1
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UNIT
%
CAS NUMBER
7440-47-3
CRITERIA
Fe
VALUE
val1
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UNIT
%
CAS NUMBER
7439-89-6
CRITERIA
Mn
VALUE
val1
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UNIT
%
CAS NUMBER
7439-96-5
CRITERIA
Mo
VALUE
val1
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UNIT
%
CAS NUMBER
7439-98-7
CRITERIA
Ni
VALUE
val1
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UNIT
%
CAS NUMBER
7440-02-0
CRITERIA
P
VALUE
val1
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UNIT
%
CAS NUMBER
7723-14-0
CRITERIA
Pb
VALUE
val1
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UNIT
%
CAS NUMBER
7439-92-1
CRITERIA
S
VALUE
val1
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UNIT
%
CAS NUMBER
7704-34-9
CRITERIA
Si
VALUE
val1
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UNIT
%
CAS NUMBER
7440-21-3
CRITERIA
Ti
VALUE
val1
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UNIT
%
CAS NUMBER
7440-32-6
CRITERIA
V
VALUE
val1
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UNIT
%
CAS NUMBER
7440-62-2

Specification for high expansion heat-resisting steel bar and wire for the manufacture of bolts, studs, set screws and nuts (Ni 25.5, Cr 15, Ti 2, Mn 1.5, Mo 1.25, Si 0.7, V 0.3) (limiting ruling section 20 mm), BS HR 650 / 1972

Heat Treatments

  • Bar and wire for machining(HR 650A) , Delivery condition - Softened + 15% = reduction = 25% + solution treated + machined or ground: Θ = (900 ±10) °C/t = 1 h/AC or OQ or WQ + Θ = (980 ±10) °C/t = 1 h/AC or OQ or WQ. Use condition, Softened + cold worked + solution treated + precipitation treated: Delivery condition + t = (720 ±10) °C/t = 16 h/AC. Bar and wire for machining(HR 650B), Delivery = Use condition - Softened + 15% = reduction = 25% + solution treated + precipitation treated + machined or ground: Θ = (900 ±10) °C/t = 1 h/AC or OQ or WQ + Θ = (980 ±10) °C/t = 1 h/AC or OQ or WQ +t = (720 ±10) °C/t = 16 h/AC.
  • Softening treatment: The material shall be heated uniformly at a temperature of 900 ± 10°C for not less than 1h followed by cooling in air, oil or water.<br><br>Solution treatment: It shall be heated uniformly at a temperature of 980 ± 10°C for not less than 1h followed by cooling in air, oil or water.<br><br>Precipitation treatment: It shall be heated uniformly at a temperature of 720 ± 10°C for not less than 16h followed by cooling in air.