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ASTM A514 Steel Plate

ASTM A514 GR M Quenched and Tempered Steel Plate Supplier

General Description

ASTM A514 Grade M Steel Plate is a quenched and tempered alloy steel with high yield strength (≥690 MPa) and excellent notch toughness. It is mainly used in high-stress structural applications, such as lifting equipment, offshore structures, bridges, and heavy-duty machinery frames.

Produced under the ASTM A514/A514M standard, this material delivers an outstanding balance between strength, weldability, and impact resistance, making it one of the preferred choices for engineers designing weight-sensitive but high-load structures.

Gangsteel, a leading manufacturer and exporter in China, offers ASTM A514 Gr M plates with various sizes, heat treatments, and customized cutting options for global projects.

Material Specification

Specification	Details
Standard	ASTM A514/A514M – High Strength Quenched and Tempered Alloy Steel
Thickness	6mm – 150mm
Width	Up to 3500mm
Length	Up to 12000mm
Heat Treatment	Quenched and Tempered
Delivery Condition	Q+T (Quenched + Tempered)
Density	7.85 g/cm³
Surface	Mill finish, shot blasted, or pickled
Origin	Gangsteel, China

Chemical Composition

Heat Analysis & Product Analysis

Element	Heat Analysis (%)	Product Analysis (%)
C (Carbon)	0.12–0.21	0.10–0.23
Mn (Manganese)	0.45–0.70	0.41–0.74
P (Phosphorus, max)	0.035	0.043
S (Sulfur, max)	0.035	0.043
Si (Silicon)	0.20–0.35	0.15–0.40
Ni (Nickel)	1.20–1.50	1.15–1.55
Mo (Molybdenum)	0.45–0.60	0.42–0.63
B (Boron)	0.001–0.005	0.0005–0.0055

This composition gives A514 Gr M its characteristic high tensile strength, good toughness, and weldability.

Mechanical Properties

Property	Requirement	Test Direction
Yield Strength (MPa)	≥ 690	Longitudinal
Tensile Strength (MPa)	760–895	Longitudinal
Elongation (%)	≥ 18	Longitudinal
Charpy V-Notch Impact (J @ -20°C)	≥ 27 J	Longitudinal
Hardness (HBW)	235 – 293	-

Note: A514 Grade M exhibits excellent impact toughness even at subzero temperatures, making it suitable for cold-region engineering projects.

Delivery Conditions

Condition Code	Description
AR	As Rolled
N	Normalized
Q+T	Quenched and Tempered (Standard)
TMCP	Thermo-Mechanically Controlled Process (Optional)

Gangsteel generally supplies A514 Grade M in Q+T condition, ensuring consistent strength and uniform microstructure.

Tolerances

As per ASTM A6/A6M

Parameter	Tolerance
Thickness	±0.3 mm (≤25 mm) / ±0.5 mm (>25 mm)
Width	+25 / –0 mm
Length	+50 / –0 mm
Flatness	≤ 3 mm per meter
Edge Condition	Mill Edge or Cut Edge

Equivalent Material Grades

Standard	Grade	Remarks
EN 10025-6	S690QL	High strength Q+T structural steel
GB/T 16270	Q690D / Q690E	Chinese equivalent
DIN 17102	StE690 / TStE690	German equivalent
JIS G3106	SM570	Similar strength, different impact grade
BS EN 10025-6	S690QL	UK equivalent with fine-grain structure
NF EN 10025-6	S690QL	French equivalent for welded structures
UNI EN 10025-6	S690QL	Italian equivalent with high yield
AS/NZS 3678	Grade 700	Australian/New Zealand equivalent for structural plates
GOST 19281	14G2AF	Russian low-alloy equivalent with similar yield
IS 2062	E690	Indian high-strength structural equivalent
CSA G40.21	700QT	Canadian quenched and tempered equivalent
SS EN 10025-6	S690QL	Swedish equivalent for high-strength applications

Applications

ASTM A514 Gr M plates are used across industries requiring high load-bearing capacity with reduced structural weight, including:

Lifting and transport equipment
Heavy-duty cranes and truck frames
Bridges and building structures
Offshore drilling platforms
Mining machinery
Pressure vessels and support frames

By choosing A514 Grade M, engineers can reduce overall structural weight by up to 20–30% compared to carbon steel plates, without sacrificing strength.

Price / Cost in China Market

Gangsteel offers competitive prices based on plate thickness, width, and order volume.

Thickness (mm)	Price (USD/ton, FOB China)
6–20	950 – 1050
21–50	980 – 1100
51–100	1100 – 1200

Note: Prices are subject to fluctuations in alloying elements and steel market conditions. For updated offers, contact us

Supplementary Requirements

Optional test services provided by Gangsteel:

Ultrasonic Testing (UT) per ASTM A435 / A578
Impact Testing (CVN) per ASTM A370
Hardness Test (HB or HV)
Third-party inspection: SGS / BV / TUV
MTC per EN10204 3.1 / 3.2

Difference vs Other Grades

Property	A514 Gr M	A514 Gr Q	A514 Gr B	A514 Gr E	A514 Gr P
Yield Strength (MPa)	690	690	690	690	690
Charpy Impact Temp	-20°C	-50°C	-20°C	-20°C	-30°C
Toughness Level	High	Very High	Medium	Medium	High
Typical Use	Structural beams	Offshore cranes	Construction frames	Bridge plates	Mining equipment

A514 Gr M provides an optimal balance between strength and low-temperature toughness, making it a cost-effective choice for general high-strength structural uses.

Why Choose Gangsteel

Over 20 years of experience in producing and exporting A514 series plates
Large inventory and fast delivery (1,000+ tons available monthly)
CNC cutting, drilling, beveling, and edge preparation
SGS/BV third-party inspection available
Global export experience: USA, Korea, Singapore, UAE, Europe

Gangsteel is one of the most trusted suppliers of A514 Grade M plates in China, with a strong record in supplying to global projects.

FAQ (Frequently Asked Questions)

Q1: What is ASTM A514 Grade M used for?

A514 Gr M is used for heavy-duty structures, cranes, bridges, and machinery requiring high strength and reduced weight.

Q2: Is ASTM A514 weldable?

Yes. It can be welded with low-hydrogen electrodes and proper preheating (typically 150–200°C) to avoid cracking.

Q3: What is the difference between A514 Grade M and Grade Q?

Both have similar yield strength (690 MPa), but Grade Q has superior impact toughness for colder environments (-50°C).

Q4: Can Gangsteel supply A514M plates with 3.2 certification?

Yes. Gangsteel provides EN10204 3.1 / 3.2 MTC, and can arrange TÜV or SGS witness testing.

Q5: What is the maximum thickness for A514 Grade M?

Typically up to 2.5 inches for full 100 ksi yield strength, but Gangsteel can supply up to 150mm with adjusted properties.

Q6: How does A514 Grade M compare to Grade B?

Grade M offers higher nickel content for better toughness, while Grade B is more cost-effective for milder conditions.

Q7: Is A514 Grade M suitable for low-temperature applications?

Yes, with good Charpy impact values at -20°C, making it viable for moderate cold environments.

Q8: What welding precautions are needed for A514 Gr M?

Use low-hydrogen processes, preheat to 150-200°C, and control interpass temperatures to prevent hydrogen cracking.

Q9: Can I get custom cuts from Gangsteel?

Yes, we offer CNC cutting, beveling, and drilling services for precise fabrication.

Q10: What is the density of A514 Grade M steel?

7.85 g/cm³, similar to other carbon and alloy steels.

Q11: How does A514 Gr M resist corrosion?

It has some resistance due to alloying elements, but additional coatings are recommended for outdoor exposure.

Q12: What are equivalent grades to A514 Grade M in Europe?

EN 10025-6 S690QL is a close equivalent with similar high-strength properties.

Conclusion

ASTM A514 Grade M quenched and tempered steel plate offers a perfect combination of high yield strength, toughness, and weldability, making it ideal for demanding structural applications.

As a professional manufacturer and exporter, Gangsteel ensures top-quality materials, fast delivery, and customized service for global clients in construction, shipbuilding, and heavy machinery industries.

Contact Gangsteel today at admin@gangsteel.com for quotations and technical support.

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ASTM A514 Steel Plate

ASTM A514 GR M Quenched and Tempered Steel Plate Supplier