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P280GH (1.0426) Carbon Steels With High Temperature Characteristics- TJC STEEL.
 P280GH in European standard EN 10222-2017 "pressure steel forgings - part 2: have a certain high temperature performance of ferrite and martensite steel", its composition and performance in JB 4726-2000 the pressure vessel [TJC STEEL]with carbon steel and low alloy steel forgings of 16 mn is similar, also with our country GB - 2009-24512.1 the nuclear power plant in seamless steel tube part 1: carbon steel seamless steel tube, HD280, HD280Cr of similar.

 

Component Specification(EN 10222-2-2017)(similarly hereinafter)

C

0.08~0.20

Cr

≤0.30

Ti

≤0.03

Si

≤0.40

Cu

≤0.30

V

≤0.02

Mn

0.90~1.50

Mo

≤0.08

Cr+Cu+Mo+Ni

≤0.70

P

≤0.025

Nb

≤0.01

carbon equivalent

≤0.45

S

≤0.015

Ni

≤0.30

[TJC STEEL]

 

 

Heat Treatment

name

code

technology

normalizing[TJC STEEL]

N

880~920℃,air cooling

Normal + tempering

NT

880~920℃,air cooling、oil cooling、water-cooling

600~640℃,air cooling、furnace cooling

Quenching + tempering

QT

 

Room-Temperature Mechanical Property

SIZE

tR≤35

35<tR≤160

yield strength ReH(MPa)

≥280

≥255

strength of extension

Rm(MPa)

460~580[TJC STEEL]

percentage elongation after fracture  A%

l

≥23

tr/t

≥21

ballistic work J

l

≥48

tr/t

≥27

 

Strong Non - Proportional Extension of Requirements for High Temperature Environments Rp0.2(MPa)

SIZE

tR≤50

50<tR≤160

T

100℃[TJC STEEL]

≥250

≥210

150℃

≥235

≥200

200℃

≥225

≥195

250℃

≥205

≥185

300℃

≥185

≥170

350℃

≥170

≥155

400℃

≥155

≥135

 

Applications:

P280GH is a kind of carbon steel with specified high temperature characteristics, and has good impact toughness and welding performance.Its use is similar to 16Mn, such as shell and tube heat exchanger carbon steel tube plate, flange, etc.The important use of P280GH is in the field of nuclear power, in the nuclear [TJC STEEL]power components are mainly used as steam generator main steam system, water supply control system, auxiliary water supply system of rolling pipe fittings or forged pipe fittings, or steam generator main steam system forging or die forging elbow.