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EN 10028-2 High temperature steel 1.7258 Round bar, Plate 1.7258 Forgings ESR melted, Hot forging, hot rolling, Heat treated, Rough turned.

TECHNICAL DATA SHEET - W-Nr 1.7258

MATERIAL CATEGORY: High temperature structural steel

PRODUCT DESCRIPTION

Alloy structural steel is provided with higher yield strength, tensile strength, endurance strength, yield ratio (about 0.85 generally ) enough plasticity and toughness.

The concentration of alloy element of this kind of steel is quite high, mainly are corrosion resistant steel, heat resistant steel, wear resistant steel, and other special steels of physical and chemical properties. Alloy structural steel has preferable mechanical property than that of carbon structural steel, high performance of heat treatment especially.

The alloy is usually produced by EAF /VD /LF followed by electroslag refining (ESR) if necessary for special purpose. Bars and, where applicable, forgings are subjected to ultrasonic examination based on the different level according to the buyers' requirements.

Bars are usually supplied bright in the annealed condition.

Final heat treatment - Quenched and tempered.

MATERIAL SPECIFICATIONS - DIN EN 10028-2 (2003), DIN 17755 (1983)

CHEMICAL COMPOSITION (mass weight - %)

Carbon, C (％): 0.20 ~ 0.28
Silicon, Si (％): ≤ 0.40
Manganese, Mn (％): 0.50 ~ 0.80
Phosphorus, P (％) ≤: 0.035
Sulfur, S (％) ≤: 0.035
Chromium, Cr (％): 0.90 ~ 1.20
Molybdenum, Mo (％): 0.20 ~ 0.35
Nickel, Ni (％): ≤ 0.60

MECHANICAL PROPERTIES - HOT WORKING, HEAT TREATMENT AND HARDNESS

Hot working temperature /℃:    1100～850
Heat treatment temperature /℃|annealing / normalizing :   650~740
Heat treatment temperature /℃|quenching:    900~950 oil or air
Heat treatment temperature /℃|tempering:    650~700
HBS: 175~220
Tensile strength, Rm (≥) / MPa: 590～740
Yield strength, Rp0.2 (≥) / MPa: 440
Elongation, (≥) A5 (%): 18.0
Impact, (≥) AKv / J 55.0

MECHANICAL PROPERTY UNDER HIGH TEMPERATURE

PROFILE AND DIMENSIONS

Round bar / rod / disc (diameter): 5.5mm to 600mm

Square bar / Flat bar: 10mm to 600mm

Plate / Sheet steel / Steel strip: 0.5mm to 500mm

Width: 8mm to 1000mm

Length: random length or based on the customer's special requirement.

Forged steel shape: stepped shafts, other different shapes based on OEM.

TYPICAL APPLICATIONS

Alloy structural steels are widely used in the filed of ship, vehicle, airplane, guided missile, weapons, railway, bridges, pressure vessel, machine tools, mechanical components with a bigger sectional size and so on.

Mechanical gears, gear shaft, main axis, valve rod.

Mechanical parts - connecting rod, bolt and nut.

Multidiameter shaft and pressure vessel.

ADVANTAGE & SUPERIOR SERVICE

20+ years Focus On Special Steel Manufacturing and processing.
Stock over 60 grades with a competitive price, along with cutting service for specific requirement.
Customizing special material is welcome.
CNC saw cutting.
Marking by stamping or printing.
Third party inspection service.
Export packing / Export documents.
Transport by Track, Sea, Courier (FedEx, UPS, DHL) and Air Cargo.
We closely cooperate with the professional inspection partners to strictly control the quality and improve the quality manage system, and guarantee the goods delivery each time. It is proved that we are worth of trusting and will be the strategic partner of the supplying chains in the special steels field.

TECHNICAL SALES ASSISTANCE

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

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