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NH25-20 Designation

Views: 0     Author: Ruiyang company     Publish Time: 2022-02-09      Origin: SHAANXI RUIYANG IMPORT AND EXPORT CO.,LTD

NH25-20 Designation corresponding grade 1.4848.HK40,SCH22

Centrifugal Casting 1.4848 Steel tube usually as furnace tube,NH25-20 are working at high temperature environment on average: 650° C-950° C. A small amount of ferrite in the metal structure of NH25-20,which with good oxidation resistance and weak thermal shock resistance.As furnace tube when temperature under 950° C,as furnace structure parts when temperature under 1150° C

Therefore most of NH25-20 are used for indirect heating to furnace like CAL (continuous annealing line). Similarly CGL (continuous galvanizing line).

NH25-20chemical components in centrifugal casting tube and elbows as below:

NH25-20 in centrifugal casting tube
DesignationCorresponding gradeSimilar grade
HG/TDIN/ENASTMJISS+CManoirKubota
NH25-20ZG40Cr25Ni20Si2GX40CrNiSi-25-201.4848HK40SCH22G/CA4848Manaurite20HK40
NH25-20 chemical components
CSiMnSPNiCrMoW
0.35-0.451.75max1.5max0.040.0419-2223-270.5max
TS Rm Mpa at R.T
YS R0.2 At RTA At RtTS at H.T 900YS at H.T900
440
240
10142
90
NH25-20 Melting temperature
SST
1315
Density of NH25-20
7.75KG/dm3
Coefficient of expansion:20-800° C
18.2
L.S.T 
1390
As cast hardness HB
180
Modulus of Elasticity 800° C133

NH25-20 as products form usually as below:

  1. Furnace tube sections

  2. Furnace roller and furnace parts

  3. Flanges and fittings

  4. Radiant tube and radiant tube coils

  5. Elbows

NH25-20 in stainless steel as SS310,Could be bars,pipes,plate,sheet,wire,fasteners,pipe fittings and related products.

Welcome contact us for NH25-20 tube and centrifugal casting tubes,welded as radiant tube,radiant coils inquiry and order.

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