Alloy ХН40МДБ (ЭП937)

Designation

Name The value
Designation GOST Cyrillic ХН40МДБ
Designation GOST Latin XH40MDB
Transliteration HN40MDB
By chemical elements CrNi40CuДBe
Name The value
Designation GOST Cyrillic ЭП937
Designation GOST Latin EP937
Transliteration EhP937
By chemical elements -

Description

Alloy ХН40МДБ used: for the manufacture of billets, sheet and rolled steel used to manufacture parts and equipment of chemical and petrochemical engineering.

Standards

Name Code Standards
Sheets and strips В33 TU 14-1-2131-77
Blanks. Of the workpiece. Slabs В31 TU 14-1-5052-91

Chemical composition

Standard C S P Mn Cr Si Ni Fe Cu N Al V B Mo Ce
TU 14-1-2131-77 ≤0.03 ≤0.02 ≤0.02 0.8-1.5 20-22 ≤0.2 39-42 Rest 1.5-2.2 ≤0.03 ≤0.2 ≤0.2 ≤0.002 5-6.5 ≤0.03
Ni is the basis.
According to TU 14-1-2131-77 the chemical composition is given for the alloy grade KhN40MDB-VI (EP937-VI). The content of niobium in the alloy should be in the range of 15С ÷ 0.8%. Cerium, boron are introduced into the metal by calculation and chemical analysis is not determined. It is allowed to introduce yttrium, the estimated content of which in the range of 0.005-0.10% is established by the supplier's technological instructions and its residual content in the metal is not determined by chemical analysis. In the finished metal, deviation in the silicon content by +0.10%, nitrogen by +0.010%, aluminum by +0.10% is allowed.

Mechanical properties

sT|s0,2, MPa σU, MPa d5, %
Sheet metal in delivery condition on the other 14-1-2131-77. Heating to 1050-1090 °C (the heating time is 5 minutes per 1 mm thickness), cooling in water or under water shower
≥196 ≥490 ≥30

Description mechanical marks

Name Description
sT|s0,2 Yield strength or limit of proportionality with a tolerance for residual deformation of 0.2%
σU Limit short-term strength
d5 Elongation after rupture

Technological properties

Name The value
Corrosion resistance ХН40МДБ alloy possesses exceptionally high resistance to pitting and pitting corrosion, corrosion cracking in chloride and hydrogen sulfide-containing media.
Foreign counterparts C-NiCr22Fe20Mo7Cu2 (ISO 12725); HASTELLOY G-3 alloy (HAYNES); NW6985 (Japan)