Inquiry (采购产品): Hardeness 45-50 HRC We need 4140 steel flat dim 6.25"x0.75"x7 feet long to be hardened to 45-50HRC Quantity - 21 We need hardness and flatness certificate. Please email the price quote and delivery. Thanks **** Hidden Message ***** DILIP MOTWANI 725 SUMMERHILL DR DELAND, FL 32724 USA Company: KINGSPAN Phone: 386-626-6789 E-mail: dilipm@alumashield.com **** Hidden Message ***** dilipm@alumashield.com