GB T-3077 30CRMNSIA standard applies to manufacture of bearing ring steel pipe rolling elements made by high-carbon chromium bearing steel processed with hot rolled forged round, steel wire, cold rolled. Continuous casting steel is not recommended to be the material of balls.

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Product Details

Product introduction

Alloy structural steel is a kind of steel which is used as mechanical parts and various engineering components, whichcontains one or more alloy elements.
30CrMnSiA is a medium carbon with high strength and poor welding performance.
30CrMnSiA has high strength and sufficient toughness after quenching and tempering, and hardenability is also good. After quenching and tempering, the material can be used as a grinding wheel shaft, gears and sprockets.
30CrMnSiA has good processability, small processing deformation and good fatigue resistance. For shaft and piston parts and so on. It is used in various special wear parts such as automobiles and airplanes.
The material is darker in color and galvanized can add aesthetics and rust.

SUPPLY RANGE OF of GB/T 30CrMnSiA

-Dimension: Diameter 4-1600 mm, any length below 16 meters

-Delivery Conditions:

Cold drawn: 4-100 mm

Peeled: 30-160 mm

Grinded: 4- 600 mm

Turned: 130-1200 mm

Hot rolled: 12-320 mm

Hot forged: 130-1600 mm

-EAF+(ESR) or EAF+LF+VD+(ESR)

-HOT rolled; Cold rolled; Forged; Cold Drawn

-Heat Treatment: Untreated, Annealing, N+T, Q+T

-Smelting: EAF+LF+VD (+ESR)

-Surface Finish: Black, Rough Machined, Peeled, Turned or upon request

-UT 100% passed

-Cutting service provided

-Third Party inspection is acceptable (SGS, BV etc.)

Technical data

Grade	C	Si	Mn	P	S	Ni	Cr	Cu
30CrMnSiA	0.28- 0.34	0.90- 1.20	0.80- 1.10	0.025 max	0.025 max	≤ 0.40	0.80- 1.10	≤ 0.25

Mechanical properties

Yield strength σs/MPa (>=)

Tensile strength σb/MPa (>=)

Elongation

δ5/% (>=)

Reduction of

area ψ/% (>=)

Impact absorbing energy Aku2/J (>=)

Hardness HBS

100/3000 max

835

1080

229

APPLICATIONS
Grinding wheel shaft, gears and sprockets
Special waer parts of automobiles and airplanes
Kinds of tool shaped cutlery
Shaft and piston parts

Quality Assurance

Below inspection will be done in the production.
(1) ray detection---RT;
(2) ultrasonic testing---UT;
(3) Magnetic Particle Testing-MT;
(4) penetration testing-PT;
(5) eddy current flaw detection-ET

CUSTOMER TRANSACTION

STORAGE VIDEO

Factory Appearance

Shandong Chengshun Metal Materials Co., Ltd. is located in Jinan City, Shandong Province. It is a comprehensive company dealing in high-quality steel products, with a superior geographical location and very convenient transportation. The company has a complete and scientific quality system, and has been recognized by the industry for its integrity, strength and product quality.

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PRODUCTION WORKSHOP

Steel Round Bars