1. Commodity: Concrete pump delivery cylinder 2. Steel Grade: CK45,C45E,SAE 1045,S45C,ST52,E355,E410,E470 3. Bore size: 150mm-280mm 4. Thickness of hard chrome plating:0.2mm-0.25mm 5. Hardness of chromed layer: HV850 min 6. Bore roughness: Ra0.25um max 7. ID tolerance: +0.1mm/-0 8. Machining&turning: as per drawing.

1. Commodity: hydraulic cylinder barrel 2. Steel Grade: DIN: ST52,ST52.3,ST52.4 EN: E355,E410,E470,C45E, JIS: STKM 13A, STKM 13B,STKM 13C GB: 20#,45#,16Mn,25Mn SAE/AISI: 1020,1026,1045,1518,1524,1541 3. Size range: Bore of 40mm-400mm 4. Bore roughness: Ra0.25um max 5. Bore tolerance: H8 or H9 6. Machining,welding,turning as per drawing. 

1. Commodity: Hollow bar 2. Steel Grade: AISI 1020, AISI 1026, AISI 1045, AISI 1518, AISI 1524, AISI 1541, AISI 4130, AISI 4140, AISI 4145,AISI 4340, AISI 8620.  3. Size range: OD of 500mm max, ID of 5mm-400mm.  4. Manufacture method: Hydraulic cold drawing, Hot rolled+deep hole bored, deep hole drilled. 5. Delivery Condition: As rolled, Normalized,Quenched+Tempered.

1. Commodity: Cold drawn seamless square steel tube / hollow section 2. Steel grade:  GB/T 3094-2012: 20#,45#,16Mn EN 10305-1: E235,E355,C45E,E410,E470,S355JR,S355J0H,S355J2H DIN 2391-2: ST45,ST52 JIS: STKM 13A, STKM 13B, STKM 13C ASTM A519: 1020,1045,1518,1524,1541 3. Size range: 60mm*60mm-250mm*250mm 4. Manufacture method: Hydraulic cold drawn 5. Delivery Condition: Cold drawn,Stress relieved.

1. Cold drawn seamless rectangular steel tube 2. Steel Grade:  GB/T 3094-2012: 20#,45#,16Mn,25Mn, EN 10305-1: E235,E355,C45E,E410,E470,S355JR,S355J2H,S355J0H DIN 2391-2: ST45,ST52,ST52.4 JIS G3445: STKM 13A, STKM 13C ASTM A519: 1020,1045,1518,1524,1541 3. Size range: 80mm*60mm-300mm*200mm 4. Manufacture method: Hydraulic cold drawn 5. Delivery condition: Cold drawn, Stress Relieved. 

1. Commodity: Cold drawn seamless honed steel tube 2. Steel Grade: SAE/AISI: 1020,1026,1045,1518,1524,1541,4130,4140,4145,4340 EN: E355,E410,E470,C45E,20MnV6,CK45 DIN: ST45,ST52,ST52.4 JIS: STKM 13A, STKM 13B,STKM 13C GB: 20#,45#,16MN,25Mn, 3. Size range: 40mm*30mm-325mm*300mm 4. Manufacture method: hydraulic cold drawn, cold rolled, hot rolled+deep hole boring 5. Delivery Condition:As rolled, Stress relieved，Annealed,Quenched+Tempered.  6. Bore treatment: Honing,skiving&roller burnishing 7. Bore roughness: Ra0.25um or Ra0.35um max at the option of the buyer.  8. ID tolerance: H8 or H9 at the option of the buyer. 

1. Commodity: Cold drawn seamless precision steel tube 2. Steel Grade: ASTM A519 1010,1020,1026,1045,1518,1524,1541,4130,4140,4145,4340 DIN 2391-2 ST35, ST45.ST52 EN 10305-1 E195,E235,E355,C45E,25CrMo4,42CrMo4 JIS G3445 STKM 13A,STKM 13B, STKM 13C GB/T 3639 10#,20#,45# 3. Size range: 10mm*1mm-356mm*15mm 4. Manufacture Method: Cold rolled, Hydraulic cold drawn 5. Delivery Condition: Cold drawn,Stress Relieved, Annealed,Normalized,Quenched+Tempered

1. Commodity: ASTM A519 cold drawn seamless mechanical tubing 2. Standard specification: ASTM A519 1010,1020,1026,1045,1518,1524,1541,4130,4140,4145,4340, 8620, BS 6323-4 CFS 3,CFS 4, CFS 5, CFS 6,CFS 7, CFS 8, CFS 10, CFS 11.  3. Size range: 10mm*1mm-356mm*15mm 4. Manufacture method: Cold rolled, hydraulic cold drawn 5. Delivery condition:  BK BKW BKS GBK NBK Q+T +C +LC +SR +A +N Q+T Cold rolled Cold drawn Stress Relieved Annealed Normalized Quenched+tempered