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Description

International ISO ISO 15510 (2010), ISO 4955 (2005), ISO 16143-3 (2005), ISO H7 Specialsteel Heat-resistant steels and Mechanical Properties, Chemical Element, Cross Reference, Datasheet.

Datasheet for: Steel Grades:Specialsteel: ISO H7
Category Class Grade Type Standard Country Application
Steel GradesSpecialsteel ISO H7 Ferrite ISO International Heat-resistant steels

Chemical composition(mass fraction)(wt.%) of the ISO H7

C Si Mn P S Cr Ni N
≤0.20 ≤1.00 ≤1.00 ≤0.040 ≤0.030 24.00 -28.00 ≤1.00 0.15 -0.25

Mechanical Properties of steel grade ISO H7

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)
543 (≥) 676 (≥) 24 41 13 Solution and Aging, Annealing, Ausaging, Q+T,etc 244

Physical Properties of steel grade ISO H7

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
21 - -     0.33 -  
449 477 - 41.3 421   -  
162 - 43 14.2   443 433

Heat Treatment of steel grade ISO H7

Heat treated : 1471°C - 1277°C

Technological Curves of steel grade ISO H7

Relevant standard of ISO H7

ISO 15510 (2010) Stainless steels -- Chemical composition ISO-15510-(2010).pdf
ISO 4955 (2005) Heat-resistant steels ISO-4955-(2005).pdf
ISO 16143-3 (2005) Stainless steels for general purposes -- Part 3: Wire ISO-16143-3-(2005).pdf

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