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1.4720 / X7CrTi12
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Technical specification of DIN 1.4720 Heat-resisting steel 1.4720 Round bar, Flat bar, Plate, X7CrTi12 steelmaking, Hot forging, rolling, heat treatment, cold worked.

TECHNICAL DATA SHEET - Heat Resisting Steel - DIN X7CrTi12 & W-Nr 1.4720

MATERIAL CATEGORY: Heat resisting steel / corrosion resisting steels

FEATURES AND CLASSIFICATIONS

Heat-resistant steel means one type of steel possesses inoxidizability, enough high-temperature strength and excellent heat-resistant quality under high temperature. Heat resistant steel is divided into oxidation resistant steel and refractory steel according to its performance. Further into Austenitic heat-resistant steel, Martensitic heat-resistant steel, Ferritic heat-resistant steel and Pearlitic heat-resistant steel according to its normalizing.

MATERIAL SPECIFICATIONS - DIN 17442,17744 (2002/1985), DIN EN 10302, 10095 (2002/1999)

CHEMICAL COMPOSITION (mass weight - %)

Carbon, C (％):  ≤ 0.08
Silicon, Si (％):  ≤ 1.00
Manganese, Mn (％):  ≤ 1.00
Phosphorus, P (％)≤:  0.040
Sulfur, S (％)≤:  0.030
Chromium, Cr (％):  10.5 ~ 12.5
Nickel, Ni (％):   -
Titanium, Ti (％): 6×C ~ 1.00

MECHANICAL PROPERTIES FINAL HEAT TREATMENT

Hardness ≤HBS:  179
Thermal forming temp/℃:  1050～750
Heat treatment temp/℃|soft annealing: 750～850
Heat treatment temp/℃|quenching:  -

Condition: annealed
Tensile strength, σb/MPa: 400～600

Yield strength, σs ≥/MPa: 210
Elongation, δ5 ≥(％): 25

MECHANICAL PROPERTY UNDER HIGH TEMPERATURE

Condition: annealed

Creep limit (1000h)/MPa，at below temp/℃|600:    27.5
Creep limit (1000h)/MPa，at below temp/℃|700:    8.5
Creep limit (1000h)/MPa，at below temp/℃|800:    3.7
Creep limit (1000h)/MPa，at below temp/℃|900:    1.8
Creep limit (1000h)/MPa，at below temp/℃|1000: —
Creep limit (1000h)/MPa，at below temp/℃|1100:   —
Creep rupture strenght (1000h)/MPa，at below temp/℃|600:    35
Creep rupture strenght (1000h)/MPa，at below temp/℃|700:    9.5
Creep rupture strenght (1000h)/MPa，at below temp/℃|800:    4.3
Creep rupture strenght (1000h)/MPa，at below temp/℃|900:    1.9

Heat resistance temperature in air /℃: 800

APPLICATION FIELD

Heat-resistant steel is widely used in the field of manufacturing the boiler, steam turbine, motive power machine, industrial furnace, and other mechanical parts of aviation, petrochemical engineering operating at high temperature. Those parts must hold the features: high temperature strength, resistance to high temperature oxide etch, enough toughness, excellent machinability, weldability, structure stability based on different usages.

MANUFACTURING TECHNOLOGY - SMELTING

Heat resistant steel is generally smelt in electric arc furnace or induction furnace. For higher quality,it should be smelt via technology of vacuum refining and external refining.

TECHNICAL SALES ASSISTANCE

If you meet further on any technical enquiry. pleased to EMAIL our resident team of qualified production engineers. Email: sales@ccsteels.com.

PRODUCT PROFILE & DIMENSIONS

Round bar / Wire rod (diameter): 5.50mm to 820mm
Square bar / flat bar: 10mm to 800mm
Length: Fixed length or random length or based on the customer's special requirement.

Heavy/middle plate via hot rolled: T20 - 400mm X W100 - 1500mm X L1000-12000mm

Sheet steel via cold rolled: T0.5 - 6mm X W60 - 1000mm X L1000 - 2000mm
Steel strip via cold rolled: T0.1 - 3mm X W5 - 200mm X L (or in coil form)
Forging piece: stepped shafts, other different shapes based on OEM.
Pipes / Tubings: OD 3-219 mm, with wall thickness ranging from 0.50 to 35 mm.

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