H12 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of H12

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ASTM H12

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This page is mainly introduced the H12 chemical information,mechanical properties, physical properties, mechanical properties, heat treatment, and Micro structure, etc. It also contains the use of H12,such as it is commonly used in bars, sheet,plates, steel coils, steel pipes,forged and other materials application.
Hot-Work Tool Steel

Cross Reference Table(Equivalent Materials):

Material Standard Country
H12 SAE USA

Chemical composition(mass fraction)(wt.%)

Elements Min.(≥) Max.(≤) Similar Remarks
C 0.30  0.40
Si 0.80  1.20
Mn 0.20  0.50
P   0.030
S   0.030
Cr 4.75  5.50
Mo 1.25  1.75
V 0.20  0.50
W 1.00  1.70
Ni+Cu   0.75

Mechanical Properties

Tensile strength 623~377 σb/MPa
Yield Strength 411 σ 0.2 ≥/MPa
Elongation 92 δ5≥(%)
ψ - ψ≥(%)
Akv - Akv≥/J
HBS 106~495 -
HRC 30 -

Physical Properties

Thermal expansion 19-06 e-6/K
Thermal conductivity 54-48 W/m.K
Specific heat 450-460 J/kg.K
Melting temperature 6245-6657 째C
Density 9583-0191 kg/m3
Resistivity 0.50-0.60 Ohm.mm2/m
     

Heat Treatment Regime

Annealing

Quenching

Tempering

Normalizing

Q & T

Size Availability

Steel Grade Specification Processing range(mm)
H12 Tool Die Steels Round Bar and Hollow Bar Φ1 to Φ2000
Square and Flat Steel Φ10 to Φ100
Plate and Sheet 0.08-800(Thickness)*10-1500(Width)*Length
Tube or Pipe OD:Φ4-410; WT:1-35 mm; Lenght:10-12000
Coil and Strip Steel THK:0.1mm Width:1500mm
Forged Ring/Cylindrical/Disk

Technical specification/standard for download