Product Uses And Introduction

This series of products consists of structural steel, and the material selection needs to be determined based on the specific circumstances. Below, we will introduce the thickness range, delivery condition, and applicable standards for each grade that we can provide. We hope this information is helpful. If you have any questions about the products or need a quote, please contact us via email. Because some grades can be categorized into multiple types according to their applications, this may cause some inconvenience in your search, for which we sincerely apologize. We also welcome any suggestions you may have. Thank you very much!

Spot inventory inquiry Spot inventory

If conditions permit, we can also provide steel mill customization services, where the thickness, width, and length can all be made to your needs, just like a tailor making clothes for you, implementing personalized orders.

Customized business email for steel mills： customize@cehesteel.com

Scope Of Supply

Executive SStandard Grade Thickness（mm） Delivery Condition
JIS G3101 SS400/SS490 6-130 AR
JIS G3106 SM400A/SM490A 6-130 AR
SM400B/SM400C 6-130 AR/CR/N/TM
SM490B/SM490C
SM490YA 6-100 AR/CR/N/TM
SM490YB
SM520B/SM520C 6-100 CR/N/TM
SM570 10-100 TM/QT
JIS G3136 SN400B/C 6-100 AR/CR/N
SN490B/C
EN10025-2 S235JR/S275JR/S355JR 6-150 AR/N
S235J0/S275J0/S355J0
S235J2/S275J2/S355J2/S355K2
EN10025-3 S275N/S275NL 6-150 N
S355N/S355NL
EN10025-4 S275M/S275ML 10-127 TM
S355M/S355ML
S420M/S420ML
S460M/S460ML
S500M/S500ML
EN10025-6 S460Q/S460QL/S460QL1 10-130 QT
S500Q/S500QL/S500QL1
S550Q/S550QL/S550QL1
S620Q/S620QL/S620QL1
S690Q/S690QL/S690QL1
GB/T 700 Q235A 6-150 AR
Q235B/Q235C/Q235D 6-150 AR/CR/N
GB/T 1591 Q355B/Q355C/Q355D/Q355E/Q355F 6-130 AR/N/TM/TM+T
Q390B/Q390C/Q390D/Q390E
Q420B/Q420C/Q420D/Q420E
Q460C/Q460D/Q460E TM/TM+T
Q500C/Q500D/Q500E
Q550C/Q550D/Q550E
Q620C/Q620D/Q620E
Q690C/Q690D/Q690E
GB/T 714 Q345/Q370QC/D/E 6-120 AR/CR/N/TM TM/TM+T    TM/TM+T
Q420/460/500/550/620/690QD/E/F
Q345/370/420/460/500/550QNHD/E/F
TB/T 3556 Q345/370/420QC/D/E 6-120 AR/CR/N/TM
Q460/500QD/E TM/TM+T
Q345/370/420/460/500QNHD/E TM/TM+T
GB/T 19879 Q345GJB/Q345GJC/Q345GJD 8-150 AR/CR/N/TM
Q390GJC/Q390GJD/Q390GJE
Q420GJC/Q420GJD/Q420GJEW
ASTM A36 A36 6-150 AR/CR/N
ASTM A283 A283 Gr.C 6-150 AR
ASTM A572/709 A572Gr.50/A709Gr.50 6-150 CR/N
A572Gr.60/A709Gr.60
ASTM A514 A514Gr.F 10-150 QT
ASTM A633 A633Gr.D/A633Gr.E 20-155 CR/N
ASTM A588 A588 Gr.A/GR.B 8-90 N+T
90.1-150 N

Chemical composition of hot-rolled low alloy steel

Grade Chemical composition（Quality fraction） / %
Steel Grade Quality Grade Cᵃ Si Mn Pᶜ Sᶜ Nbᵈ Vᵉ Tiᵉ Cr Ni Cu Mo Nᶠ B
Thickness
≤40B ＞40 ≤
≤
Q355 B 0.24 0.55 1.6 0.035 0.035 - - - 0.3 0.3 0.4 - 0.012 -
C 0.2 0.22 0.03 0.03
D 0.2 0.22 0.025 0.025
Q390 B 0.2 0.55 1.7 0.035 0.035 0.05 0.13 0.05 0.3 0.5 0.4 0.1 0.015 -
C 0.03 0.03
D 0.025 0.025
Q420ᵍ B 0.2 0.55 1.7 0.035 0.035 0.15 0.13 0.05 0.3 0.8 0.4 0.2 0.015 -
C 0.03 0.03
Q460ᵍ C 0.2 0.55 1.8 0.03 0.03 0.05 0.13 0.05 0.3 0.8 0.4 0.2 0.015
a For structural steel sections with a nominal thickness greater than 100 mm, the carbon content can be determined through negotiation between the supplier and the buyer.
b Nominal thickness＞30mm thick steel with a carbon content of no more than 0.22%.
c For structural steel and bars, the upper limit for phosphorus and sulfur content can be increased by 0.005%.
d The maximum percentage for Q390 and Q420 can reach 0.07%, while for Q460 it can reach 0.11%.
e Up to 0.2%
f If the acid-soluble aluminum (Als) content of the steel is not less than 0.015% or the total aluminum content is not less than 0.02%, or if other oxygen-fixing alloying elements are added, the nitrogen content is not limited, and the oxygen-fixing elements should be specified in the quality certificate.
g Applicable only to structural steel and bars

Grades and chemical composition of normalized and normalized rolled steel

Grade Chemical composition（Quality fraction） / %
Steel Grade Quality Grade C Si Mn Pᵃ Sᵃ Nb V Tiᶜ Cr Ni Cu Mo N Alsᵈ≥
≤ ≤ ≤
Q355N B 0.2 0.5 0.9--1.65 0.035 0.035 0.005-0.05 0.01-0.12 0.006-0.05 0.3 0.5 0.4 0.1 0.015 0.015
C 0.03 0.03
D 0.03 0.025
E 0.18 0.025 0.02
F 0.16 0.02 0.01
Q390N B 0.2 0.5 0.9--1.7 0.035 0.035 0.01-0.05 0.01-0.2 0.006-0.05 0.3 0.5 0.4 0.1 0.015 0.015
C 0.03 0.03
D 0.03 0.025
E 0.025 0.02
Q420N B 0.2 0.6 1.00--1.7 0.035 0.035 0.01-0.05 0.01-0.2 0.006-0.05 0.3 0.8 0.4 0.1 0.015 0.015
C 0.03 0.03
D 0.03 0.025 0.025
E 0.025 0.02
Q460Nᵇ C 0.2 0.6 1.00--1.70 0.03 0.03 0.01-0.05 0.01-0.2 0.006-0.05 0.3 0.8 0.4 0.1 0.015 0.015
D 0.03 0.025 0.025
E 0.025 0.02
The steel should contain at least one of the grain-refining elements such as aluminum, niobium, vanadium, and titanium. When added alone or in combination, the content of at least one alloying element should not be less than the lower limit specified in the table.
a.For structural steel and bar stock, the upper limit for phosphorus and sulfur content can be increased by 0.005%.
b.V+NB+Ti≤0.22%,Mo+Cr≤0.30%。
c.It can be as high as 0.20%.
d.All-aluminum (Alt) can be used as a substitute, in which case the minimum content of all-aluminum is 0.020%. When grain-refining elements such as niobium, vanadium, and titanium are added to the steel and their content is not less than the lower limit specified in the table, there is no limit to the lower limit of aluminum content.

Grades and chemical composition of thermomechanically rolled steel

Grade Chemical composition（Quality fraction）/%
Steel Grade Quality   Grade C Si Mn Pᵃ Sᵃ Nb V Tiᵇ Cr Ni Cu Mo N B Alsᶜ   ≥
≤
Q355M B 0.14ᵈ 0.5 1.6 0.035 0.035 0.01-0.05 0.01-0.1 0.006-0.05 0.3 0.5 0.4 0.1 0.015 — 0.015
C 0.03 0.03
D 0.03 0.025
E 0.025 0.02
F 0.02 0.01
Q390M B 0.15ᵈ 0.5 1.7 0.035 0.035 0.01-0.05 0.01-0.12 0.006-0.05 0.3 0.5 0.4 0.1 0.015 — 0.015
C 0.03 0.03
D 0.03 0.025
E 0.025 0.02
Q420M B 0.16ᵈ 0.5 1.7 0.035 0.035 0.01-0.05 0.01-0.12 0.006-0.05 0.3 0.8 0.4 0.2 0.015 一 0.015
C 0.03 0.03
D 0.03 0.025 0.025
E 0.025 0.02
Q460M C 0.16ᵈ 0.6 1.7 0.03 0.03 0.01-0.05 0.01-0.12 0.006-0.05 0.3 0.8 0.4 0.2 0.015 一 0.015
D 0.03 0.025 0.025
E 0.025 0.02
Q500M C 0.18 0.6 1.8 0.03 0.03 0.01-0.11 0.01-0.12 0.006-0.05 0.6 0.8 0.55 0.2 0.015 0.004 0.015
D 0.03 0.025 0.025
E 0.025 0.02
Q550M C 0.18 0.6 2 0.03 0.03 0.01-0.11 0.01-0.12 0.006-0.05 0.8 0.8 0.8 0.3 0.015 0.004 0.015
D 0.03 0.025 0.025
E 0.025 0.02
Q620M C 0.18 0.6 2 0.03 0.03 0.01-0.11 0.01-0.12 0.006-0.05 1 0.8 0.8 0.3 0.015 0.004 0.015
D 0.03 0.025 0.025
E 0.025 0.02
Q690M C 0.18 0.6 2 0.03 0.03 0.01-0.11 0.01-0.12 0.006-0.05 1 0.8 0.8 0.3 0.015 0.004 0.015
D 0.03 0.025 0.025
E 0.025 0.02
The steel should contain at least one of the grain-refining elements such as aluminum, niobium, vanadium, and titanium. When added alone or in combination, the content of at least one alloying element should not be less than the lower limit specified in the table.
a.For structural steel and bars, the phosphorus and sulfur content can be increased by 0.005%.
b.It can be as high as 0.2%.
c.All-aluminum (Alt) can be used as a substitute, in which case the minimum all-aluminum content is 0.02%. When grain-refining elements such as niobium, vanadium, and titanium are added to the steel and their content is not less than the lower limit specified in the table, there is no limit to the lower limit of aluminum content.
d.For structural steel and bars, the maximum carbon content of Q355M, Q390M, Q420M and Q460M can be increased by 0.02%.

Tensile properties of hot-rolled steel

Grade Upper yield strength ReHᵃ/MPa
≥		 Tensile strength Rm/MPa
Steel Grade Quality
Grade		 Nominal thickness or diameter/MM
≤16 ＞16~
40		 ＞40~
63		 ＞63~
80		 ＞80~
100		 ＞100~
150		 ＞150~
200		 ＞200~
250		 ＞250~
400		 ≤100 ＞100~
150		 ＞150~
250		 ＞250~
400
Q355 B、C 355 345 335 325 315 295 285 275 — 470~
630		 450~
600		 450~
600		 —
D 265B 450~
600B
Q390 B、C、D 390 380 360 340 340 320 — — — 490~
650		 470~
620		 — —
Q420ᶜ B、C 420 410 390 370 370 350 — — — 520~
680		 500~
650		 — —
Q460ᶜ C 460 450 430 431 432 390 — — — 550~
720		 530~
700		 — —
a.When the yield strength is not obvious, the specified plastic elongation strength Rp0.2 can be used instead of the upper yield strength.
b. Applicable only to steel plates of quality grade D.
c. Applicable only to structural steel and bars.

Elongation of hot-rolled steel

Grade Elongation after fractureA/％≥
Steel Grade Quality Grade Nominal thickness or diameter/MM
Sample Direction ≤40 ＞40~63 ＞63~100 ＞100~150 ＞150~250 ＞250~400
Q355 B、C、D Vertical 22 21 20 18 17 17ᵃ
Horizontal 20 19 18 18 17 17ᵃ
Q390 B、C、D Vertical 21 20 20 19 — —
Horizontal 20 19 19 18 — —
Q420ᵇ B、C Vertical 20 19 19 19 — —
Q460ᵇ C Vertical 18 17 17 17 — —
a.It is only applicable to steel plates of quality grade D.
b.Applicable only to structural steel and bars.

Tensile properties of normalized and normalized rolled steel

Grade Upper yield strength ReHᵃ/MPa
≥		 Tensile strength Rm/MPa Elongation after fractureA/％
D≥
Steel Grade Quality Grade Nominal thickness or diameter/MM
≤16 ＞16~
40		 ＞40~
63		 ＞63~
80		 ＞80~
100		 ＞100~
150		 ＞150~
200		 ＞200~
250		 ≤100 ＞100~
200		 ＞200~
250		 ≤16 ＞16~
40		 ＞40~
63		 ＞63~
80		 ＞80~
200		 ＞200~
250
Q355N B、C、D、E、F 355 345 335 325 315 295 285 275 470~
630		 450~
600		 450~
600		 22 22 22 21 21 21
Q390N B、C、D、E 390 380 360 340 340 320 310 300 490~
650		 470~
620		 470~
620		 20 20 20 19 19 19
Q420N B、C、D、E 420 400 390 370 360 340 330 320 520~
680		 500~
650		 500~
650		 19 19 19 18 18 18
Q460N C、D、E 460 440 430 410 400 380 370 370 540~
720		 530~
710		 510~
690		 17 17 17 17 17 16
Note: Normalizing state includes normalizing plus tempering state.
a.When the yield strength is not obvious, the specified plastic elongation strength Rp0.2 can be used instead of the upper yield strength REH.

Tensile properties of thermomechanically rolled (TMCP) steel

Grade Upper yield strength ReHᵃ/MPa
≥		 Tensile strengthRm/MPa Elongation after fractureA/％
≥
Steel Grade Quality Grade Nominal thickness or diameter/MM
≤16 ＞16~
40		 ＞40~
63		 ＞63~
80		 ＞80~
100		 ＞100~
120		 ≤40 ＞40~
63		 ＞63~
80		 ＞80~
100		 ＞100~
120B
Q355M B、C、D、E、F 355 345 335 325 325 320 470~630 450~
610		 440~
600		 440~
600		 430~
590		 22
Q390M B、C、D、E 390 380 360 340 340 335 490~650 480~
640		 470~
630		 460~
620		 450~
610		 20
Q420M B、C、D、E 420 400 390 380 370 365 520~680 500~
660		 480~
640		 470~
630		 460~
620		 19
Q460M C、D、E 460 440 430 410 400 385 540~720 530~
710		 510~
690		 500~
680		 490~
660		 17
Q500M C、D、E 500 490 480 460 450 — 610~770 600~
760		 590~
750		 540~
730		 — 17
Q550M C、D、E 550 540 530 510 500 — 670~830 620~
810		 600~
790		 590~
780		 — 16
Q620M C、D、E 620 610 600 580 — — 710~880 690~
880		 670~
860		 — — 15
Q690M C、D、E 690 680 670 650 — — 770~940 750~
920		 730~
900		 — — 14
Note: Thermomechanically rolled (TMCP) condition includes thermomechanically rolled (TMCP) plus tempering condition.
a.When the yield strength is not obvious, the specified plastic elongation strength Rp0.2 can be used instead of the upper yield strength REH.
b.For structural steel and bars, the thickness or diameter shall not exceed 150 mm.

Temperature and impact energy absorbed in Charpy (V-notch) impact test

Grade Minimum shock absorption energy (KV²/J) at the following test temperatures
Steel Grade Quality
Grade		 20℃ 0℃ －20℃ －40℃ －60℃
Vertical Horizontal Vertical Horizontal Vertical Horizontal Vertical Horizontal Vertical Horizontal
Q355、Q390、
Q420		 B 34 27 — — — — — — — —
Q355、Q390、
Q420、Q460		 C — — 34 27 — — — — — —
Q355、Q390 D — — — — 34ᵃ 27ᵃ — — — —
Q355N、Q390N、
Q420N		 B 34 27 — — — — — — — —
Q355N、Q390N
Q420N、Q460N		 C — — 34 27 — — — — — —
D 55 31 47 27 40ᵇ 20 — — — —
E 63 40 55 34 47 27 31ᶜ 20ᶜ — —
Q355N F 63 40 55 34 47 27 31 20 27 16
Q355M、Q390M、
Q420M		 B 34 27 — — — — — — — —
Q355M、
Q390M、Q420M
Q460M		 C — — 34 27 — — — — — —
D 55 31 47 27 40ᵇ 20 — — — —
E 63 40 55 34 47 27 31ᶜ 20ᶜ — —
Q355M F 63 40 55 34 47 27 31 20 27 16
Q500M、
Q550M、Q620M
Q690M		 C — — 55 34 — — — — — —
D — — — — 47ᵇ 27 — — — —
E — — — — — — 31ᶜ 20ᶜ — —
When the buyer does not specify the test temperature, C, D, E, and F grade steels that are normalized, normally rolled, or thermomechanically rolled shall be tested at 0℃, -20℃, and -40℃ respectively.
-60℃ impact.
Longitudinal specimens are used for impact testing.With the consent of both the supplier and the buyer, transverse samples may also be taken.
a.It is only applicable to Q355D steel plates with a thickness greater than 250mm.
b.When specified by the buyer, the longitudinal impact absorption energy of Grade D steel can be not less than 27J when subjected to an impact test at -30℃.
c.When specified by the buyer, Grade E steel can withstand impact at -50℃ with an impact absorption energy of not less than 27J in the longitudinal direction and not less than 16J in the transverse direction.

Bending test

Sample direction 180°Bending test
D—Bending indenter diameter,a—Sample thickness or diameter
Nominal thickness or diameter/MM
≤16 ＞16~100
For steel plates and strips with a nominal width of not less than 600 mm, take transverse samples.；Other steel
Take longitudinal sample		 D=2a D=3a