13MnNiMoR Steel Plate for Pressure Vessels (GB/T 713)

13MnNiMoR is a low-alloy pressure vessel steel plate grade under the Chinese national standard. The manufacturing specification is GB/T 713.2-2023 (previous version: GB/T 713-2014), and the ultrasonic testing standard is NB/T 47013.3-2015.

This grade is a low-alloy steel containing manganese, nickel, and molybdenum, offering excellent strength, toughness, and high-temperature performance for heavy-wall pressure vessels and critical equipment.

13MnNiMoR steel plates are impact tested at 0 C as standard, with minimum absorbed energy of 47 J (average).

13MnNiMoR designation explanation: 13 stands for average carbon content (0.13%), Mn denotes Manganese, Ni denotes Nickel, Mo denotes Molybdenum, R denotes Pressure Vessel Steel.

Yield Strength
>=380MPa
Tensile Strength
570-720 MPa
Impact (0 C)
>=47 J
Standard
GB/T 713.2-2023

Product Overview

13MnNiMoR Steel Plate is a low-alloy pressure vessel steel manufactured in accordance with GB/T 713.2-2023. It contains manganese, nickel, and molybdenum as alloying elements, providing excellent strength, toughness, and high-temperature performance for heavy-wall pressure vessels and critical equipment.

Compared with Q345R, 13MnNiMoR offers better high-temperature performance and improved toughness due to the addition of nickel and molybdenum, making it suitable for more demanding service conditions.

Yield 295MPa Ni-Mo Alloyed Weldable 0 C Impact

Core Advantages

  • High toughness with Ni and Mo microalloying
  • Excellent high-temperature mechanical properties
  • Customizable: HIC/SSC, high-temp properties
  • Normalized + tempered (N+T) delivery condition

Professional Technical Support and Customization

Comprehensive Knowledge Base: Our sales team is proficient in mainstream domestic and international pressure vessel standards. Whether it's the Chinese national standard 13MnNiMoR, the American ASME standard, or other international standards, we can provide accurate technical communication.

Zero Communication Errors: With solid product knowledge, we can avoid all basic errors during the order technical condition confirmation stage, ensuring the accuracy of your order.

Flexible Customization Capabilities: The 13MnNiMoR standard does not have mandatory requirements for hardness and high-temperature performance. If your design has special requirements (e.g., specific hardness, high-temperature mechanical properties, simulated post-weld heat treatment, HIC/SSC testing), we support customized production.

Hot-rolled ~15 days
Normalized ~30 days
Max thickness 150mm


 Applications

Heavy-wall reactors
High-pressure heat exchangers
Separators and accumulators
Spherical tanks
Petrochemical pressure vessels
LPG and LNG storage tanks


 Stock Resources

Normalized plates: 6-150mm (W:2000-2500, L:11000-12500)

Hot-rolled plates: 6-36mm (W:1800-2500, L:11000-12500)

Hot-rolled coils: 5-16mm (W:1500-2000)

Spot stock size range and supply conditions

Hot Rolled (AR)
Thickness (mm) Width (mm) Length (mm)
6-36 1800/2000/2200/2500 11000-12500
Normalized (N/N+T)
Thickness (mm) Width (mm) Length (mm)
6-150 2000/2200/2500 11000-12500
Hot-Rolled Coils
Thickness (mm) Width (mm)
5-16 1500/1800/2000

Supply Condition: CR, AR, N, N+T

13MnNiMoR Chemical Composition (max %)

C Si Mn Cu Ni Cr Mo Nb V Ti P S
<=0.15 0.15-0.50 1.20-1.60 <=0.30 0.6-1.00 0.20-0.40 0.20-0.35 0.005-0.02 - - <=0.020 <=0.010

13MnNiMoR - Alloying Elements and Roles

per GB/T 713.2-2023
C Carbon <=0.15%

Influences strength and hardness.

Si Silicon 0.15-0.50%

Deoxidizer, increases strength.

Mn Manganese 1.20-1.60%

Enhances strength and toughness.

P Phosphorus <=0.020%

Harmful element, reduces toughness.

S Sulfur <=0.010%

Harmful element, causes hot shortness.

Ni Nickel 0.60-1.00%

Enhances toughness and low-temperature properties.

Mo Molybdenum 0.20-0.35%

Improves high-temperature strength and corrosion resistance.

Cu+Ni+Cr+Mo Residual Total <=0.70%

As residual elements, Cu, Ni, Cr each <=0.40%, Mo as alloying element up to 0.35%.

13MnNiMoR typical ranges (wt%): C <=0.15, Si 0.15-0.50, Mn 1.20-1.60, P<=0.020, S<=0.010, Ni 0.20-0.50, Mo 0.20-0.35.

13MnNiMoR Mechanical Properties and Impact Test

Thickness (mm) YS (MPa) TS (MPa) Elong (%) Impact 0 C (J)
6-100 >=390 570-720 18 >=47
>100-150 >=380 570-720 18 >=47

13MnNiMoR High-Temperature Mechanical Properties (Rp0.2 or RcL, MPa)

Thickness (mm) 100℃ 150℃ 200℃ 250℃ 300℃ 350℃ 400℃ 450℃ 500℃
6-100 370 360 355 350 345 335 305 - -
>100-150 360 350 345 340 335 325 300 - -

Note: High-temperature tensile properties available upon request. Values based on GB/T 713.2-2023 Table 3.

13MnNiMoR vs Q345R

Item 13MnNiMoR Q345R
Standard GB/T 713.2 GB/T 713.2
Alloying Elements Mn, Ni, Mo Mn
Yield Strength >=295 MPa >=345 MPa
Tensile Strength 450-590 MPa 510-640 MPa
Max Thickness 150 mm 150 mm
Impact mandatory Yes (0 C, >=47J) Yes (0 C, >=34J)

Scenario-Based Recommendation - GB Grade Comparison

Q345R

General pressure vessels, boilers
Yield >=345 MPa - Tensile 510-640 MPa
Charpy: 0 C
Standard grade, cost-effective
Q345R details

Q370R

High-pressure vessels, lightweight design
Yield >=370 MPa - Tensile 530-630 MPa
Charpy -20 C
Higher strength than Q345R
Q370R details

18MnMoNbR

Heavy-wall reactors, high-temp service
Yield >=400 MPa - Tensile 570-720 MPa
Charpy 0 C
Mo-Nb alloyed for high-temp performance
18MnMoNbR details

13MnNiMoR

Heavy-wall vessels, petrochemical equipment
Yield >=380 MPa - Tensile 570-720 MPa
Charpy 0 C (47 J)
Ni-Mo alloyed for high toughness
[Current Grade]

16MnDR

Cryogenic tanks, cold regions
Yield >=315 MPa - Tensile 490-620 MPa
Charpy -40 C
Low-temperature application
16MnDR details
Quick selection path: Q345R (standard) -> Q370R -> 18MnMoNbR (Mo-Nb) -> 13MnNiMoR (Ni-Mo, high toughness) ; Low-temp branch: 16MnDR (-40 C)

Quality Control and Inspection

Mill Test Certificate 3.1 Chemical analysis Mechanical testing Charpy V-notch 0 C High-temp tensile UT optional

Customizable Specification Range for 13MnNiMoR

Thickness
6-150 mm
(custom rolling)
Width
1500-5200 mm
(adjustable per order)
Length
<= 18000 mm
(max. single length)

Delivery Condition

AR CR TMCP N+T N

AR as rolled - CR controlled rolled - TMCP thermo-mechanical - N+T normalized + tempered - N normalized

Additional Requirements

  • Simulated post-weld heat treatment (PWHT)
  • Brinell hardness requirements
  • HIC / SSC testing
  • High-temperature tensile properties

Other customized technical conditions are also negotiable.

The above ranges represent our standard customizing capability.

Frequently Asked Questions

What is 13MnNiMoR steel plate used for?

13MnNiMoR steel plate is mainly used for heavy-wall reactors, high-pressure heat exchangers, separators, spherical tanks, and petrochemical pressure vessels requiring excellent toughness and high-temperature performance.

What is the impact test temperature for 13MnNiMoR?

13MnNiMoR steel plates are impact tested at 0 C as standard, with minimum average absorbed energy of 47 J (Charpy V-notch).

What is the difference between 18MnMoNbR and 13MnNiMoR?

13MnNiMoR contains nickel (0.20-0.50%) which enhances toughness, while 18MnMoNbR contains niobium (0.025-0.050%) for grain refinement. 13MnNiMoR offers better toughness with slightly lower strength, suitable for heavy-wall equipment requiring excellent impact resistance.

What is the delivery condition for 13MnNiMoR?

13MnNiMoR is typically delivered in normalized (N) or normalized + tempered (N+T) condition with a tempering temperature not lower than 620 C.

Can you provide 13MnNiMoR steel plates with custom sizes?

Yes. Custom rolling up to 150mm thick, 5200mm wide, 18000mm long. Delivery: 15-20 days hot-rolled, 30-35 days normalized.

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