High Strength Steel
Show

tinplate 5
tinplate 6
tinplate 7
tinplate 2
tinplate 4
tinplate 8

Chemical Composition

High Strength Steel and Spring Tool Steel Chemical Composition Table
Grade Carbon
C (%)		 Manganese Mn (%) Phosphorus P (%) Sulfur S (%) Iron
Fe (%)		 Application
Q345B≤0.201.0–1.6≤0.035≤0.035Residual (≈98.7)Welded structures, high-rise buildings
Q390B≤0.201.2–1.6≤0.035≤0.035Residual (≈98.5)Machinery manufacturing, bridge components
Q420B≤0.201.3–1.7≤0.035≤0.035Residual (≈98.4)Pressure vessels, lifting equipment
Q460C≤0.201.4–1.8≤0.030≤0.030Residual (≈98.3)Heavy-duty structures, high-strength plates
S355MC≤0.12≤1.50≤0.025≤0.015Residual (≈98.3)Automobile crossbeams, chassis structures
S500MC≤0.10≤1.50≤0.025≤0.015Residual (≈98.4)Cold-formed structural parts
S700MC≤0.07≤1.50≤0.020≤0.010Residual (≈98.6)High-strength load-bearing components
SPFH540≤0.12≤1.60≤0.030≤0.020Residual (≈98.2)Automobile mainframes, steel frames
SPFH590≤0.10≤1.70≤0.030≤0.020Residual (≈98.1)Stamped structures, vehicle body parts
SPFH780≤0.10≤1.80≤0.025≤0.015Residual (≈98.0)High-strength frames, high-speed steels
65Mn0.62–0.700.90–1.20≤0.03≤0.03Residual (≈98.0)Spring steel sheets, tools
60Si2Mn0.56–0.640.60–0.90≤0.03≤0.03Residual (≈98.2)Heavy-duty springs
SUP90.52–0.600.60–0.90≤0.035≤0.035Residual (≈98.3)Automobile leaf springs
SUP100.55–0.650.75–1.00≤0.030≤0.035Residual (≈98.1)High-load spring steel
42CrMo0.38–0.450.40–0.70≤0.035≤0.040Residual (≈98.6)High-strength quenched and tempered structural steel
SK50.80–0.90≤0.50≤0.03≤0.03Residual (≈98.4)Saw blades, knives, spring sheets

Physical Properties

High Strength Steel and Spring Tool Steel Physical Properties Table
Grade Temper Vickers Hardness (HV) Tensile Strength (MPa) Elongation (%)
Q345BHot Rolled160–190470–63021
Q390BHot Rolled170–210510–68019
Q420BHot Rolled180–220550–71017
Q460CHot Rolled190–240590–74016
S355MCCold Rolled170–210480–62020
S500MCCold Rolled190–230550–70016
S700MCCold Rolled210–260700–85013
SPFH540Cold Rolled180–220540–69018
SPFH590Cold Rolled190–230590–74016
SPFH780Cold Rolled210–250780–95014
65MnTempered280–320850–10008
60Si2MnTempered250–300750–95010
SUP9Tempered230–280740–90012
SUP10Tempered240–290760–93011
42CrMoQuenched and Tempered280–320930–108012
SK5Annealed/Quenched180–250750–95010
厚度
Thickness (mm)		 公称宽度 < 600mm
Nominal Width < 600mm		 600mm ≤ 公称宽度 < 1560mm
600mm ≤ Nominal Width < 1560mm
JIS G4305 ASTM 240 我司标准 JIS G4305 ASTM 240 我司标准
0.1 ≤ t < 0.2±0.02±0.015±0.01///
0.2 ≤ t < 0.3±0.025±0.02±0.01±0.038±0.038±0.015
0.3 ≤ t < 0.4±0.03±0.025±0.015±0.04±0.04±0.015
0.4 ≤ t < 0.5±0.04±0.03±0.015±0.04±0.04±0.02
0.5 ≤ t < 0.6±0.04±0.03±0.015±0.04±0.04±0.02
0.6 ≤ t < 0.7±0.045±0.035±0.015±0.05±0.05±0.02
0.7 ≤ t < 0.8±0.045±0.035±0.015±0.05±0.05±0.02
0.8 ≤ t < 0.9±0.05±0.035±0.02±0.06±0.06±0.025
0.9 ≤ t < 1.0±0.05±0.035±0.02±0.06±0.06±0.025
1.0 ≤ t < 1.5±0.06±0.04±0.025±0.07±0.07±0.03
1.5 ≤ t < 2.0±0.07±0.04±0.03±0.08±0.08±0.035

© 2025 Dongguan Dechuang Hardware Co., Ltd. All Rights Reserved. ICP No. 2020103562

Dongguan Dechuang Hardware Co., Ltd.
Phone: +86-769-81888566
Mobile (WhatsApp): +86-13332617868 (Jane) / +86-17620152277 (Eric)
Email: hcy518@163.com (Jane) / sale2@dgdechuang.com (Eric)
Office Address: Room 2103, Building 8, Vanke Center, No.1 Changqing South Road, Chang’an Town, Dongguan, China
Factory Address: No.6 Shukeng Street, Yanwu Village, Dalingshan Town, Dongguan, Guangdong, China