Alloy Steel  
 
Alloy bars are essentially carbon grade bars to which have been addedvarious chemical elements. The primary alloying elements are nickel,chromium, manganese, molybdenum, vanadium, silicon and copper.The purpose of adding these elements is to improve the mechanicalproperties of the finished products. Alloy bars are classified by thefollowing grades
Grade Designations and Chemical Compositions of Hot-Wrought Alloy Steel Bars A, B
UNS Grade D Chemical Composition, Ranges and Limits, %
Designation C Designations Carbon Manganese Phosphorus, Sulfur, E Silicon F Nickel Chromium Molybdenum
    max max
G13300 1330 0.28–0.33 1.60–1.90 0.035 0.04 0.15–0.35 --- --- ---
G13350 1335 0.33–0.38 1.60–1.90 0.035 0.04 0.15–0.35 --- --- ---
G13400 1340 0.38–0.43 1.60–1.90 0.035 0.04 0.15–0.35 --- --- ---
G13450 1345 0.43–0.48 1.60–1.90 0.035 0.04 0.15–0.35 --- --- ---
G40230 4023 0.20–0.25 0.70–0.90 0.035 0.04 0.15–0.35 --- --- 0.20–0.30
G40240 4024 0.20–0.25 0.70–0.90 0.035 0.035–0.05 0.15–0.35 --- --- 0.20–0.30
G40270 4027 0.25–0.30 0.70–0.90 0.035 0.04 0.15–0.35 --- --- 0.20–0.30
G40280 4028 0.25–0.30 0.70–0.90 0.035 0.035–0.05 0.15–0.35 --- --- 0.20–0.30
G40370 4037 0.35–0.40 0.70–0.90 0.035 0.04 0.15–0.35 --- --- 0.20–0.30
G40470 4047 0.45–0.50 0.70–0.90 0.035 0.04 0.15–0.35 --- --- 0.20–0.30
G41180 4118 0.18–0.23 0.70–0.90 0.035 0.04 0.15–0.35 --- 0.40–0.60 0.08–0.15
G41200   0.18–0.23 0.90–1.20 0.035 0.04 0.15–0.35 --- 0.40–0.60 0.13–0.20
G41210   0.18–0.23 0.75–1.00 0.035 0.04 0.15–0.35 --- 0.45–0.65 0.20–0.30
G41300 4130 0.28–0.33 0.40–0.60 0.035 0.04 0.15–0.35 --- 0.80–1.10 0.15–0.25
G41370 4137 0.35–0.40 0.70–0.90 0.035 0.04 0.15–0.35 --- 0.80–1.10 0.15–0.25
G41400 4140 0.38–0.43 0.75–1.00 0.035 0.04 0.15–0.35 --- 0.80–1.10 0.15–0.25
G41420 4142 0.40–0.45 0.75–1.00 0.035 0.04 0.15–0.35 --- 0.80–1.10 0.15–0.25
G41450 4145 0.43–0.48 0.75–1.00 0.035 0.04 0.15–0.35 --- 0.80–1.10 0.15–0.25
G41470 4147 0.45–0.50 0.75–1.00 0.035 0.04 0.15–0.35 --- 0.80–1.10 0.15–0.25
G41500 4150 0.48–0.53 0.75–1.00 0.035 0.04 0.15–0.35 --- 0.80–1.10 0.15–0.25
G41610 4161 0.56–0.64 0.75–1.00 0.035 0.04 0.15–0.35 --- 0.70–0.90 0.25–0.35
G43200 4320 0.17–0.22 0.45–0.65 0.035 0.04 0.15–0.35 1.65–2.00 0.40–0.60 0.20–0.30
G43400 4340 0.38–0.43 0.60–0.80 0.035 0.04 0.15–0.35 1.65–2.00 0.70–0.90 0.20–0.30
G43406 E4340 0.38–0.43 0.65–0.85 0.025 0.025 0.15–0.35 1.65–2.00 0.70–0.90 0.20–0.30
G46150 4615 0.13–0.18 0.45–0.65 0.035 0.04 0.15–0.35 1.65–2.00 --- 0.20–0.30
G46200 4620 0.17–0.22 0.45–0.65 0.035 0.04 0.15–0.35 1.65–2.00 --- 0.20–0.30
G46210 4621 0.18–0.23 0.70–0.90 0.035 0.04 0.15–0.35 1.65–2.00 --- 0.20–0.30
G46260 4626 0.24–0.29 0.45–0.65 0.035 0.04 0.15–0.35 0.70–1.00 --- 0.15–0.25
G47150   0.13–0.18 0.70–0.90 0.035 0.04 0.15–0.35 0.70–1.00 0.45–0.65 0.45–0.60
G47200 4720 0.17–0.22 0.50–0.70 0.035 0.04 0.15–0.35 0.90–1.20 0.35–0.55 0.15–0.25
G48150 4815 0.13–0.18 0.40–0.60 0.035 0.04 0.15–0.35 3.25–3.75 --- 0.20–0.30
G48170 4817 0.13–0.20 0.40–0.60 0.035 0.04 0.15–0.35 3.25–3.75 --- 0.20–0.30
G48200 4820 0.18–0.73 0.50–0.70 0.035 0.04 0.15–0.35 3.25–3.75 --- 0.20–0.30
G51170 5117 0.15–0.20 0.70–0.90 0.035 0.04 0.15–0.35 --- 0.70–0.90 ---
G51200 5120 0.17–0.22 0.70–0.90 0.035 0.04 0.15–0.35 --- 0.70–0.90 ---
G51300 5130 0.28–0.33 0.70–0.90 0.035 0.04 0.15–0.35 --- 0.80–1.10 ---
G51320 5132 0.30–0.35 0.60–0.80 0.035 0.04 0.15–0.35 --- 0.75–1.00 ---
G51350 5135 0.33–0.38 0.60–0.80 0.035 0.04 0.15–0.35 --- 0.80–1.05 ---
G51400 5140 0.38–0.43 0.70–0.90 0.035 0.04 0.15–0.35 --- 0.70–0.90 ---
G51500 5150 0.48–0.53 0.70–0.90 0.035 0.04 0.15–0.35 --- 0.70–0.90 ---
G51550 5155 0.51–0.59 0.70–0.90 0.035 0.04 0.15–0.35 --- 0.70–0.90 ---
G51600 5160 0.56–0.64 0.75–1.00 0.035 0.04 0.15–0.35 --- 0.70–0.90 ---
G51986 E51100 0.98–1.10 0.25–0.45 0.025 0.025 0.15–0.35 --- 0.90–1.15 ---
G52986 E52100 0.98–1.10 0.25–0.45 0.025 0.025 0.15–0.35 --- 1.30–1.60 ---
  Vanadium
G61180 6118 0.16–0.21 0.50–0.70 0.035 0.04 0.15–0.35 --- 0.50–0.70 0.10–0.15
G61500 6150 0.48–0.53 0.70–0.90 0.035 0.04 0.15–0.35 --- 0.80–1.10 0.15 min
  Molybdenum
G86150 8615 0.13–0.18 0.70–0.90 0.035 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
G86170 8617 0.15–0.20 0.70–0.90 0.035 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
G86200 8620 0.18–0.23 0.70–0.90 0.035 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
G86220 8622 0.20–0.25 0.70–0.90 0.035 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
G86250 8625 0.23–0.28 0.70–0.90 0.035 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
G86270 8627 0.25–0.30 0.70–0.90 0.035 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
G86300 8630 0.28–0.33 0.70–0.90 0.035 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
G86370 8637 0.35–0.40 0.75–1.00 0.035 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
G86400 8640 0.38–0.43 0.75–1.00 0.035 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
G86420 8642 0.40–0.45 0.75–1.00 0.035 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
G86450 8645 0.43–0.48 0.75–1.00 0.035 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
G86550 8655 0.51–0.59 0.75–1.00 0.035 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.15–0.25
G87200 8720 0.18–0.23 0.70–0.90 0.035 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.20–0.30
G87400 8740 0.38–0.43 0.75–1.00 0.035 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.20–0.30
G88220 8822 0.20–0.25 0.75–1.00 0.035 0.04 0.15–0.35 0.40–0.70 0.40–0.60 0.30–0.40
G92590 9259 0.56–0.64 0.75–1.00 0.035 0.04 0.70–1.10 --- 0.45–0.65 ---
G92600 9260 0.56–0.64 0.75–1.00 0.035 0.04 1.80–2.20 --- --- ---
Standard Boron Steels G
G50441 50B44 0.43–0.48 0.75–1.00 0.035 0.04 0.15–0.35 --- 0.20–0.60 ---
G50461 50B46 0.44–0.49 0.75–1.00 0.035 0.04 0.15–0.35 --- 0.20–0.35 ---
G50501 50B50 0.48–0.53 0.75–1.00 0.035 0.04 0.15–0.35 --- 0.40–0.60 ---
G50601 50B60 0.56–0.64 0.75–1.00 0.035 0.04 0.15–0.35 --- 0.40–0.60 ---
G51601 51B60 0.56–0.64 0.75–1.00 0.035 0.04 0.15–0.35 --- 0.70–0.90 ---
G81451 81B45 0.43–0.48 0.75–1.00 0.035 0.04 0.15–0.35 0.20–0.40 0.35–0.55 0.08–0.15
G94171 94B17 0.15–0.20 0.75–1.00 0.035 0.04 0.15–0.35 0.30–0.60 0.30–0.50 0.08–0.15
G94301 94B30 0.28–0.33 0.75–1.00 0.035 0.04 0.15–0.35 0.30–0.60 0.30–0.50 0.08–0.15

 

  
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