Main Products: steel pipe ,steel tube ,steel hollow section ,galvanized steel ,steel coil ,steel plate ,steel sheet ,steel bar
SKD11 tool steel round bar material
Negotiable /Metric Ton
Min.Order:25 Metric Tons
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Shandong Youjia New Materical Co., Ltd
Business Type: Manufacturer
Ji'nan Shandong ChinaMain Products: steel pipe ,steel tube ,steel hollow section ,galvanized steel ,steel coil ,steel plate ,steel sheet ,steel barProduct Details
Specifications of Round Steel Rod / Bar
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 of Round Steel Rod / Bar
| 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 |
Produce Process of Round Steel Rod / Bar
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
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