Product

Grade

Specification (mm)

Use

Executive Standard

Carbon Structural Steels

Q235A、Q235B

φ20～φ180

Used for construction and bridge structural components, motor shafts, worm gears, piston rods, etc.

GB/T 700

A105

φ20～φ180

Used for pressure-bearing pipe fittings,valves,flanges,and other industrial components.

Technical Agreement

Quality Carbon Structural Steels

10、 20、 25、 35、 45、 55

φ20～φ180

Used for fasteners,pins,shafts,piston rods,NEV (New Energy Vehicle) components, heavy-duty vehicle brake discs, brake shafts, and other machined parts.

GB/T 699 or Technical Agreement

low-alloy high-strength structural steel

Q355B

φ20～φ180

Used for high-strength components such as buildings, bridges, construction machinery and large equipment

GB/T 1591

Alloy Structural Steels

Cr

20Cr、 40Cr、 45Cr

φ20～φ180

Used for carburized transmission gears,motor shafts,Grade 8.8～10.9 high-strength bolts,high-strength nuts,pins,shafts,bushings,and other industrial components.

GB/T 3077 or Technical Agreement

CrMo

20CrMoA、 30CrMoA、 35CrMoA、 42CrMoA

φ20～φ180

Used for mechanical parts,gears,Grade 10.9～12.9 fasteners,and various pin shafts,etc.

GB/T 3077 or Technical Agreement

CrMnTi

20CrMnTi、 30CrMnTi

φ20～φ180

For gears and mechanical parts, etc.

GB/T 3077 or Technical Agreement

Mn

40Mn、 50Mn、 20Mn2、 40Mn2

φ20～φ180

Used for automotive chassis parts, support shafts, “four-wheel and one-track” undercarriage components of excavators and loaders, and grinding media for metallurgical and cement industries.

GB/T 3077 or Technical Agreement

MnB

35MnB (H)、 40MnB (H)

φ20～φ180

Used for undercarriage components of crawler-type construction machinery and excavator bucket teeth,etc.

GB/T 3077 or Technical Agreement

MnTiB

20MnTiB

φ20～φ180

Used for sub-Grade-10.9 fasteners, gears, shafts, pins, and threaded rods.

GB/T 3077 or Technical Agreement

MnNi

25MnNi

φ20～φ180

Used for high-speed EMU door bolts.

GB/T 3077 or Technical Agreement

ASTM,JIS,DIN Structural Steel

4140、 B7、 SCM440、 42CrMo4

φ20～φ180

For Grade 12.9 fasteners,threaded rods for petrochemical applications,etc.

Technical Agreement

Mining Grinding Ball Steel

B2-1、 B2-2、

B2-3

φ30～φ120

Used for grinding steel balls for metallurgical and cement applications.

Technical Agreement

B3-1、B3-2

φ75～φ120

Steel for tube Billets

10、 20、 37Mn5

φ20～φ180

Used for Seamless steel pipes

Technical Agreement

Steel for Machine Tool Guide Rails

S46C、 S55C

φ20～φ180

Used for ordinary and precision machine tool guideways.

Technical Agreement

Gear Steel

20CrMnTiH、 20CrMnTiH2、 20CrMnTiH5、 20CrMnTiH6、 20CrMnSi、 16MnCrS5、 20MnCr5、 18CrMnMoB

φ20～φ180

Used for general carburized gears, gear shafts, NEV (New Energy Vehicle) gear applications, and wind power transmission gears

GB/T 5216 or Technical Agreement

Bucket Tooth Steel

30CrMnSiTi、 30CrMnSiA、 30CrMnSiMo

φ60～φ180

Used for forged components such as excavator bucket teeth.

Technical Agreement

Spring Steel

60Si2Mn、 50CrV、 51CrMoV4

φ20～φ180

Used for general springs, construction-machinery springs, and automotive springs.

GB/T 1222 or Technical Agreement

Non-Quenched & Tempered Steel / As-Rolled Steel

30MnVS、 38MnVS、 S36CrVIS2

φ20～φ180

Used for piston rod shafts, connecting rod-type components, and similar shaft parts.

GB/T 15712 or Technical Agreement

Tool Steel / Mold Steel

718、H13

φ20～φ180

Used for hot-work tooling and punches.

GB/T 1299 or Technical Agreement

Bearing Steel

GCr15、etc.

φ20～φ180

Used for various mechanical bearings.

GB/T 18254 or Technical Agreement

Free-Machining Steel / Free-Cutting Steel

20Mn2S、45S、12T5

φ20～φ180

Used for manufacturing small parts, automotive components, and shaft bushings ,etc.

GB/T 8731 or Technical Agreement

Steel for Wind Power Equipment

42CrMo、30CrBA、34CrMo4

φ20～φ180

Used for wind power bolts, nuts and related fasteners.

Technical Agreement