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Description

UK B.S. 2/2 Steel for cold forged fasteners and similar components and 2/2 Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Special Alloy: 2/2
Category Type Steel Grade Standard Country Application
Steel GradesSpecial Alloy 2/2 B.S. UK Steel for cold forged fasteners and similar components
X3CrMnNiMoN25-6-4
Grade 0
0/1
0/2
0/3
0/4
1/1
1/2
1/3
2/1

Chemical composition(mass fraction)(wt.%) of the 2/2

C(%) Si(%) Mn(%) P(%) S(%) Mo(%)
0.40-0.45 0.15-0.40 0.80-1.00 0.035 0.035 0.25-0.35

Mechanical Properties of steel grade 2/2

Yield
Rp0.2 (MPa)
Tensile
Rm (MPa)
Impact
KV/Ku (J)
Elongation
A (%)
Reduction in cross section on fracture
Z (%)
As-Heat-Treated Condition Brinell hardness (HBW)
816 (≥) 937 (≥) 32 23 33 Solution and Aging, Annealing, Ausaging, Q+T,etc 222

Physical Properties of steel grade 2/2

Temperature
(°C)
Modulus of elasticity
(GPa)
Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) and Thermal conductivity
(W/m·°C)
Specific thermal capacity
(J/kg·°C)
Specific electrical resistivity
(Ω mm²/m)
Density
(kg/dm³)
Poisson’s coefficient, ν
32 - -     0.34 -  
522 288 - 42.3 342   -  
334 - 11 31.2   443 321

Heat Treatment of steel grade 2/2

Heat treated : 1376°C - 1242°C

Technological Curves of steel grade 2/2

Cross Reference Table (Equivalent Grade) of 2/2

Grade Standard Country Application
X15CrMoCoV10-10-5 DIN Germany Hot working alloy tool steel
S2-10-1-8 DIN Germany High-speed tool steel
S18-0-1 DIN Germany High-speed tool steel
BL1 UK Carbide for cutting tools
BL1 UK Carbide for cutting tools
W 1.00-1.60 AFNOR France Carbide for cutting tools
W 1.00-1.60 AFNOR France Carbide for cutting tools
HS18-0-1 AFNOR France Carbide for cutting tools
HS18-0-1 AFNOR France Carbide for cutting tools
у10-1 ГОСТ Russia Carbide for cutting tools
у10-1 ГОСТ Russia Carbide for cutting tools
HS1-8-1 ISO ISO Carbide for cutting tools
HS1-8-1 ISO ISO Carbide for cutting tools
X15CrNiSi20-12 Germany Stainless steel
X12CrNiMoNb20-15 DIN Germany Stainless steel
SUS309STP JIS Japan austenitic special steel
X1CrNiM0CUN20-18-7 UK austenitic special steel
X1CrNiMoCuN20-18-7 AFNOR France Austenite
Z17CNS20-12 AFNOR France Stainless Steel Plate & Steel Strip
X10CrNiMoMnNbVB15-10-1 AFNOR France Fasteners with stainless steel and nickel alloy for high temperature and low temperature (NF-EN 10269(1999))

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