Factory price steel round bar din1.2344 sae 1.2344 bars
Negotiable /Metric Ton
Min.Order:25 Metric Tons
Shandong Youjia New Materical Co., Ltd
Cheap Metal Steel Roofing Sheet,28 gauge corrugated steel roofing sheet
Best Sale 6mm Hot Rolled Steel Plate / Coil / Steel Plate For Shipbuilding
19x19 pre galvanized square pipe, galvanised steel rectangle pipe, gi square tube
Perfect Quality g350 cold rolled PPGI and PPGL steel coils manufactures With Trade Assurance
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