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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