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We offer ASTM A515gr55/60/65/70 steel plate/sheet for boiler steels:
1. Chemical composition:
Grade 60 :
Thickness under 25.4mm C: ≤ 0.24 Si: 0.15- 0.4 Mn: ≤0.9 P: ≤ 0.035 S: ≤ 0.035
Thickness between 25.4-50.8mm C: ≤ 0.27 Si: 0.15- 0.4 Mn:≤0.9 P:≤0.035 S: ≤ 0.035
Thickness between 50.8-101.6mm C:≤0.29 Si: 0.15- 0.4 Mn:≤0.9 P:≤0.035 S: ≤ 0.035
Grade 65 :
Thickness under 25.4mm C: ≤ 0.28 Si: 0.15- 0.4 Mn: ≤0.9 P: ≤ 0.035 S: ≤ 0.035
Thickness between 25.4-50.8mm C: ≤ 0.31 Si: 0.15- 0.4 Mn:≤0.9 P:≤0.035 S: ≤ 0.035
Thickness between 50.8-101.6mm C:≤0.33 Si: 0.15- 0.4 Mn:≤0.9 P:≤0.035 S: ≤ 0.035
Grade 70 :
Thickness under 25.4mm C: ≤ 0.31 Si: 0.15- 0.4 Mn: ≤1.2 P: ≤ 0.035 S: ≤ 0.035
Thickness between 25.4-50.8mm C: ≤ 0.33 Si: 0.15- 0.4 Mn:≤1.2 P:≤0.035 S: ≤ 0.035
Thickness between 50.8-101.6mm C:≤0.35 Si: 0.15- 0.4 Mn:≤1.2 P:≤0.035 S: ≤ 0.035
2.Mechanical properties:
Tensile Strength σb(MPa) :
Grade 60 : 415-550 Grade 65 : 450-580 Grade 70 : 485-620
Yield Strength σ0.2 :
Grade 60 :≥220 Grade 65 :≥240 Grade 70 :≥260
Elongation δ5(%) :
Grade 60 : ≥ 21 (GL=8(200)) ≥ 25(GL=2(50))
Grade 65 : ≥ 19(GL=8(200)) ≥23(GL=2(50))
Grade 70 : ≥17(GL=8(200)) ≥21(GL=2(50))
3. Characters :
A515gr55/60/65/70 steel plate is one mainly of Steel for Boilers and Pressure Vessels, A515gr55/60/65/70 covers steel plates of intermediate tensile strength for pressure vessels to be operated at intermediate or higher temperatures. A515gr55/60/65/70 offer excellent combinations of strength, weldability and toughness to permit designers flexibility in the design of pressure vessels coming under the jurisdiction of the ASME Pressure Vessel Code.
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