Shandong Youjia New Materical Co., Ltd: Ji'nan, Shandong, China; Main products: steel pipe, steel tube, steel hollow section, galvanized steel , steel coil , steel plate, steel sheet , steel bar

Home > Products > Steel strucuture > The Best Astm Mild Galvanized Carbon Steel Round Bar

The Best Astm Mild Galvanized Carbon Steel Round Bar

FOB Price

Negotiable / Metric Ton

25 Metric Tons(Min.Order)

Request Sample Customized Request Request Free Catalogs

Contact Now

Get lowest price

Product Details

Standard: AISI, JIS, DIN, GB

Grade: 4140, SCM440, 1.7225, 42CrMo

Diameter: Round steel bar 60-800mm

Flat steel bar 25-400mm*200-800mm

Length: 2-12m or as required

Technique: Hot Rolled, Forged

Surface: Black surface/ Grinded/ Machined

GB	DIN	AISI	JIS
42CrMo	1.7225	4140	SCM440

Forging		Heat to 1150°C. Hold until uniform. Minimum forging temperature 850°C.Cool slowly in ashes or sand etc.
Annealing		Heat to 830°C-850°C.Cool in furnace.
Normalising		Heat to 870°C-900°C.Cool in still air.
Stress Relieving		Annealed: Heat to 600°C-650°C.Hardened: Heat to 500°C-550°C.Cool in still air.
Hardening		Heat to 830°C-880°C. Quench in oil or polymer.
Tempering		Heat to 450°C-700°C cool in still air. NB. Tempering within the range 200°C-420°C will result in temper brittleness and should be avoided.

Chemical Composition

C	Si	Mn	Cr	Mo	P	S
0.38-0.43	0.40max	0.60-0.90	0.90-1.20	0.15-0.30	≤0.035	≤0.035

Production Flow

Electric arc furnace melting→refining furnace→vacuum treatment furnace→

→cast ingot→steel ingot anneal→ heating → high-speed forging, refining

forging→annel,retarded cooling,air cooling→quenching and tempering

treatment→finishing operation→test→finished products

Shandong Youjia New Materical Co., Ltd: Contact nameBessie Jia
Chat Now; AddressDongdu international plaza, Ji'nan, Shandong

Steel pipe/tube	Steel coil/plate	Steel strucuture	Aluminum coil/sheet
HDPE pipe/tube	PVC pipe/tube