T8A

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China JB T8A 机床零件热处理技术条件第1部分：退火、正火、调质 and Mechanical Properties, Chemical Element, Cross Reference.

Datasheet for: Metals: T8A / T8A

Category	Grade	Standard	Region/Area	Standard Content
Metals	T8A	JB/T 8491.1	China	机床零件热处理技术条件第1部分：退火、正火、调质

Chemical composition(mass fraction)(wt.%) of the T8A

Element	Min	Max	Similar

The data is being updated,

Mechanical Properties of steel grade T8A

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)
617 (≥)	465 (≥)	24	31	12	Solution and Aging, Annealing, Ausaging, Q+T,etc	221

Physical Properties of steel grade T8A

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
11	-	-			0.44	-
918	387	-	13.3	444		-
654	-	13	14.2			111	113

Heat Treatment of steel grade T8A

Heat treated : 1491°C - 1664°C

Technological Curves of steel grade T8A

No Curve

Cross Reference Table (Equivalent Grade) of T8A

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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T8A