Both are 690 MPa-class Q&T plate with similar tensile bands. S690QL carries a −40 °C impact guarantee and EN delivery rules; A514 is specified to ASTM with its own grade chemistries.

Grades · Structural & HSLA Steel · S690QL

S690QL

Data verified

S690QL is the EN 10025-6 quenched-and-tempered structural steel with 690 MPa minimum yield — the grade behind weight-critical crane booms, mining equipment and mobile machinery in Europe. Its low-temperature toughness (−40 °C) matches the strength, unlike cheaper Q&T plates.

DIN1.8928 (S690QL)

AISIA514 (near)

GBQ690D (near)

CategoryStructural & HSLA Steel

Chemical composition

Element	Content (%)
C	≤0.20
Si	≤0.80
Mn	≤1.70
P	≤0.020
S	≤0.010
Cr	≤1.50
Ni	≤2.00
Mo	≤0.70
B	≤0.005

Weight percent, per the governing standard ranges. Actual values per heat are on the mill certificate.

Properties

Yield strength	≥690 MPa (≤50 mm)
Tensile strength	770–940 MPa
Impact	QL: 27 J at −40 °C
Density	7.85 g/cm³

Heat treatment

Delivered quenched and tempered. Post-weld heat treatment is generally not permitted above the mill tempering temperature.

Equivalent grades

Standard	Designation
din	1.8928 (S690QL)
aisi	A514 (near)
gb	Q690D (near)

Compare side by side: S690QL vs Q690D · S690QL vs ASTM A514

Equivalents overlap in chemistry and use but are not always identical — see our equivalents guide before substituting in certified designs.

Applications & Processing

Applications: Crane booms and chassis, mining trucks, lifting equipment, penstocks.

Processing: Weld with matched high-strength low-hydrogen consumables, controlled preheat and interpass temperature; avoid overheating the HAZ.

FAQ

S690QL vs A514?: Both are 690 MPa-class Q&T plate with similar tensile bands. S690QL carries a −40 °C impact guarantee and EN delivery rules; A514 is specified to ASTM with its own grade chemistries.

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Source: EN 10025-6 published ranges · Last updated 2026-11-03. Data is indicative — verify critical values against the governing standard and mill certificate before use.