A517 Grade B high strength steel plate

ASTM A517 Grade B is a quenched and tempered alloy steel plate intended for use in fusion welded boilers and other pressure vessels. A517 Grade B has a minimum yield strength of 100 ksi [690 MPa] and a minimum transverse Charpy V-notch lateral expansion of 0.015 inches (0.38 mm).

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Product Description

1.What is the chemical composition of A517 Grade B steel?

A517 grade B Chemical Composition
Grade	The Element Max(%)
Grade	C	Si	Mn	P	S
A517 grade B	0.13-0.23	0.13-0.37	0.64-1.10	0.035	0.035
	Cr	Mo	B	Ti	V
	0.36-0.69	0.12-0.28	0.0005-0.005	0.01-0.05	0.02-0.09

2.What is difference for ASTM A517 grade e steel materials and ASTM A517 grade B ?

Property	A517 Grade E	A517 Grade B
Standard	ASTM A517 (High-Strength Quenched & Tempered Alloy Steel)
Primary Application	Heavy-duty structural components (e.g., crane booms, mining equipment)	Pressure vessels, wind turbine towers
Tensile Strength	≥760 MPa (110 ksi)	≥860 MPa (125 ksi)
Yield Strength	≥690 MPa (100 ksi)	≥760 MPa (110 ksi)
Key Composition	– Lower carbon (C ≤0.22%) – Higher chromium (Cr 0.40-0.80%) – Nickel (Ni 0.70-1.20%)	– Higher carbon (C ≤0.23%) – Molybdenum (Mo 0.45-0.65%) – Boron (B 0.001-0.003%)
Impact Toughness	Excellent low-temperature toughness (Charpy V-notch @ -40°C)	Moderate toughness (typically tested at room temp)
Weldability	Requires preheat (~150°C) and post-weld heat treatment (PWHT)	Similar requirements but more sensitive to cracking due to boron content
Corrosion Resistance	Better (due to Ni/Cr content)	Standard (relies on coatings for harsh environments)
Cost	Higher (alloy-intensive)	More economical

3.What is A517 Grade B material? What are its main applications?

Material Type:

A517 Grade B is a quenched and tempered high-strength low-alloy steel (compliant with ASTM A517 standard).

Typical Applications:
– High-pressure vessels (e.g., hydraulic cylinders, gas storage tanks)
– Wind turbine towers
– Critical load-bearing components in engineering machinery

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