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SAE J2340 Steel Sheet

Apr 03, 2024

SAE J2340 steels are dent-resistant, high-strength and ultra-high strength commonly used in the automotive industry. SAE J2340 constitutes seven grades of continuously cast high strength automotive sheet steels that can be formed, welded, assembled, and painted in automotive manufacturing processes. These steels can be specified as hot-rolled sheet, cold-reduced sheet, uncoated, or coated by hot dipping, electroplating, or vapor deposition of zinc, aluminum, and organic compounds normally applied by coil coating.

 

Automotive Sheet Steel SAE J2340

The material SAE J2340-340X
Mechanical property YS TS(MPa) EL(%) n
  340-440 410    

 

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Grade Type: A

Steel Description: Dent Resistant Non-Bake-Hardenable

Type A-This steel is dent-resistant and does not require baking or hardening. Its yield strength is increased through work hardening caused by strain during forming.

 

Minimum mechanical properties

Grade YS(MPa) TS(MPa) EL(%) n
SAE J2340-180A
180 310 40 0.2
SAE J2340-210A
210 330 38 0.19
SAE J2340-250A
250 355 36 0.18
SAE J2340-280A
280 375 36 0.16
 

Grade Type: B

Steel Description: Dent Resistant Non-Bake-Hardenable

Type B steel is a unique type of steel that exhibits exceptional dent resistance and can be further strengthened through a bake-hardening process. During the forming stage, the steel undergoes work hardening due to the strain applied, and additional strengthening occurs during the subsequent paint baking process. This bake-hardenable steel is known for its superior performance in automotive and other applications where dent resistance is critical.

 

Minimum mechanical properties

Grade YS(MPa) TS(MPa) EL(%) n
SAE J2340-180B
180 300 39 0.19
SAE J2340-210B
210 320 37 0.17
SAE J2340-250B
250 345 35 0.16
SAE J2340-280B
280 365 35 0.15
 

Grade Type: X & Y

Steel Description: High Strength Low Alloy

Often known as High Strength Low Alloy (HSLA) steels, Type X and Y are both composed of alloys with high strength, containing elements that form carbides and nitrides, such as niobium (columbium), titanium, and vanadium, either individually or in combination. To enhance formability and weldability, the carbon content must not exceed 0.13%, while phosphorus should be limited to 0.060% or less. The minimum requirement for niobium (columbium), titanium, or vanadium is set at 0.005%, and sulfur must be kept below a maximum of 0.015%.

 

Minimum mechanical properties

Grade YS(MPa) TS(MPa)
SAE J2340-300X
300-400 ≥370
SAE J2340-300Y
300-400 ≥400
SAE J2340-340X
340-440 ≥410
SAE J2340-340Y
340-440 ≥440
SAE J2340-380X
380-480 ≥450
SAE J2340-380Y
380-480 ≥480
SAE J2340-420X
420-520 ≥490
SAE J2340-420Y
420-520 ≥520
SAE J2340-490X
490-590 ≥560
SAE J2340-490Y
490-590 ≥590
SAE J2340-550X
550-680 ≥620
SAE J2340-550Y
550-680 ≥650
 

Grade Type: R

Steel Description: High Strength Recovery Annealed

Type R steel is known for its high strength, which is achieved through cold work and alloying elements similar to Types S and X. It has a low carbon content of 0.13% to improve formability and welding, while phosphorus and sulfur are limited to 0.100% and 0.015%, respectively. This steel is ideal for bending and roll-forming due to its directional mechanical properties, although its ductility and formability are somewhat restricted.

 

Minimum mechanical properties

Grade YS(MPa) TS(MPa) EL(%)
SAE J2340-490R
490-590 ≥500 ≥13
SAE J2340-550R
550-650 ≥560 ≥10
SAE J2340-700R
700-800 ≥710 ≥8
SAE J2340-830R
830-960 ≥860 ≥2
 

Grade Type: DH & DL

Steel Description: Ultra High Strength Dual Phase

 

Type DH & DL steel is characterized by its ultra high strength and dual phase microstructure composed of ferrite and martensite. The strength of this steel is determined by the percentage of low-carbon martensite present in the microstructure.

 

Minimum mechanical properties

Grade YS(MPa) TS(MPa)
SAE J2340-500DL
≥300 ≥500
SAE J2340-600DH
≥500 ≥600
SAE J2340-600DL1
≥350 ≥600
SAE J2340-600DL2
≥280 ≥600
SAE J2340-700DH
≥550 ≥700
SAE J2340-800DL
≥500 ≥800
SAE J2340-950DL
≥550 ≥950
SAE J2340-1000DL
≥700 ≥1000
 

Grade Type: DH & DL

 

Steel Description: Ultra High Strength Dual Phase

Type M steel refers to fully martensitic ultra high strength sheet steels, where the strength level is determined by the carbon content. These steels are known for their high strength, but they have limited ductility.

 

Minimum mechanical properties

Grade YS(MPa) TS(MPa)
SAE J2340-800M
≥600 ≥800
SAE J2340-900M
≥750 ≥900
SAE J2340-1000M
≥750 ≥1000
SAE J2340-1100M
≥900 ≥1100
SAE J2340-1200M
≥950 ≥1200
SAE J2340-1300M
≥1050 ≥1300
SAE J2340-1400M
≥1150 ≥1400
SAE J2340-1500M
≥1200 ≥1500
 

Other supply grades

SAE J2340 300XF
ASTM A653 DDS Type C-G40
SAE J2340 340XF
ASTM A653 DDS Type C-G60
SAE J2340 420XF
ASTM A653 DDS Type C-G90
SAE J2340 490XF
ASTM A653 DDS Type C-G100
SAE J2340 550XF
SAE1015
ASTM A-1011M HSLAS-F Grade30
SAE1020
ASTM A-1011M HSLAS-F Grade33
SAE1035
ASTM A-1011M HSLAS-F Grade36
SAE1045
ASTM A-1011M HSLAS-F Grade40
SAE1050
ASTM A-1011M HSLAS-F Grade45
SAE1055
ASTM A-1011M HSLAS-F Grade50
SAE1018
ASTM A-1011M HSLAS-F Grade55
SAE1020
ASTM A-1011M HSLAS-F Grade60
SAE1022
ASTM A-1011M HSLAS-F Grade70
SAE1035
ASTM A-1011M HSLAS-F Grade80
SAE1045
ASTM A653 DDS Type A
SAE1050
ASTM A653 DDS Type B
SAE1055
ASTM A653 DDS Type C-G30
SAE1070
ASTM A653 DDS Type C-G40
SAE1070


SAE J2340 grades are available with about 5% higher formability at each strength level. GNEE Steel will gladly help you select the exact grade for your needs.

 

  • Available Steel Grade
Steel grade Coating Yield(MPA) Tensile(MPA) Elongation(%)
DX51D Z,ZF -- 270-500 20
DX52D Z,ZF 140-300 270-420 22
DX53D Z,ZF 140-260 270-380 26
DX54D Z,ZF 140-220 270-350 30
S220GD Z,ZF 220 300 18
S250GD Z,ZF 250 330 17
S280GD Z,ZF 280 360 16
S320GD Z,ZF 320 390 15
S350GD Z,ZF 350 420 14
S400GD Z,ZF 400 470 --
S450GD Z,ZF 450 530 --
S500GD Z,ZF 500 560 --

 

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