PH 255 TN

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International ISO PH255TN Steel flat products for pressure purposes - Technical delivery conditions - Part 4: Nickel-alloy steels with specified low temperature properties and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: PH255TN / PH 255 TN

Category	Grade	Standard	Region/Area	Standard Content
Metals	PH 255 TN	ISO 9328-4	International	Steel flat products for pressure purposes - Technical delivery conditions - Part 4: Nickel-alloy steels with specified low temperature properties

Chemical composition(mass fraction)(wt.%) of the PH 255 TN

Element	Min	Max	Similar
V	-	0.0500	-
Ti	-	0.0300	-
Si	0.1000	0.3500	-
S	-	0.0350	-
P	-	0.0350	-
Ni	-	0.3000	-
Nb+V+Ti	-	0.0500	-
Nb	-	0.0500	-
N	-	0.0200	-
Mo	-	0.0800	-
Mn	0.5000	1.4000	-
Cu	-	0.3000	-
Cr+Cu+Mo	-	0.4500	-
Cr	-	0.3000	-
C	-	0.1700	-
Al	0.0200	-	-

Mechanical Properties of steel grade PH 255 TN

Yield R_p0.2 (MPa)	Tensile R_m (MPa)	Impact KV/Ku (J)	Elongation A (%)	Reduction in cross section on fracture Z (%)	As-Heat-Treated Condition	Brinell hardness (HBW)
146 (≥)	476 (≥)	33	13	41	Solution and Aging, Annealing, Ausaging, Q+T,etc	343

Physical Properties of steel grade PH 255 TN

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
23	-	-			0.33	-
393	454	-	24.3	414		-
529	-	23	24.2			432	114

Heat Treatment of steel grade PH 255 TN

Heat treated : 1654°C - 1513°C

Technological Curves of steel grade PH 255 TN

No Curve

Cross Reference Table (Equivalent Grade) of PH 255 TN

Grade	Standard	Country	Application
ASTM 5140
AISI 201
AISI 202
1.2767
17-4PH
AISI 1052
AISI 416Se
AISI 1330
AISI 205 Stainless Steel
AISI A10
AISI A2
AISI A3
AISI A4
1.0036
1.0037
SAE J403
UNS G10100
AMS 4924
ASTM A36
Electrode 100S-1

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