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T20812 Application:Alloy tool steel

Category	Type	Steel grade	Standard	Country
Grades	Special Alloy	T20812	UNS	USA

Chemical composition % of the ladle analysis of grade T20812

C(％)	Si(％)	Mn(％)	P(％)	S(％)	Cr(％)	Mo(％)	V(%)	W(%)
0.30～0.40	0.80～1.20	0.20～0.50	≤0.030	≤0.030	4.75～5.50	1.25～1.75	0.20～0.50	1.00～1.70

T20812

Mechanical properties of grade T20812

Proof strength Rp0.2 (MPa)	Tensile strength Rm (MPa)	Impact energy KV (J)	Elongation at fracture A (%)	Reduction in cross section on fracture Z (%)	As-Heat-Treated Condition	Brinell hardness (HBW)
712 (≥)	759 (≥)	14	22	22	Solution and Aging, Annealing, Ausaging, Q+T,etc	241

Physical properties of grade T20812

Property	Density kg/dm3	Temperature T °C/F	Specific heat J / kgK	Thermal conductivity W/mK	Electric resistance µΩ·cm	Modulus of elasticity kN/mm2	Expansion rate
358 (≥)	957 (≥)	12	42	13	Solution and Aging, Annealing, Ausaging, Q+T,etc	214
Temp. °C/°F	Creep strain limit (10000h) (Rp1,0) N/mm2	Creep rupture strength (10000h) (Rp1,0) N/mm2
519	711	437

T20812 Range of products

Product type	Products	Dimension	Processes	Deliver Status
Plates / Sheets	Plates / Sheets	0.08-200mm(T)*W*L	Forging, hot rolling and cold rolling	Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Steel Bar	Round Bar, Flat Bar, Square Bar	Φ8-1200mm*L	Forging, hot rolling and cold rolling, Cast	Black, Rough Turning, Shot Blasting,
Coil / Strip	Steel Coil /Steel Strip	0.03-16.0x1200mm	Cold-Rolled & Hot-Rolled	Annealed, Solution and Aging, Q+T, ACID-WASHED, Shot Blasting
Pipes / Tubes	Seamless Pipes/Tubes, Welded Pipes/Tubes	OD:6-219mm x WT:0.5-20.0mm	Hot extrusion, Cold Drawn, Welded	Annealed, Solution and Aging, Q+T, ACID-WASHED

Cross Reference Table(Equivalent Grade)

Grade	Standard	Country	Application
T20812	UNS	USA	Hot-Work Tool Steel
T20812	UNS	USA	Hot-Work Tool Steel

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