Standard AISI SAE 1050 A36 Q235 Q345 Hot Rolled Black Hardened Alloy Carbon Steel Square Flat Steel/ Hexagonal Steel

• Customization: Available
• Type: Square Steel, Flat Steel, Hexagonal Steel4
• Standard: AISI, ASTM, DIN, JIS, GB, BS
• Model NO.: 1050 A36 Q235 Q345
• Composition: Alloy Steel
• Technique: Hot Rolled
• Shape: Bar
• Surface Treatment: Blace/Polishing/Galvanizing/ etc
• Special Use: High-strength Steel Plate, Wear Resistant Steel, Silicon Steel, Cold Heading Steel, Free Cutting Steel, Mold Steel
• Application: Automobiles, Agriculture, Construction, Motorcycle
• Processing Technology: Turned and Polished or Cold Drawn Condition
• Tolerance: H9 or Higher
• Surface of Peeled Steel: Bright
• Cutting Pieces Tolerance: -0.1/+0.1mm
• Transport Package: Standard Seaworthy Export Packaging or as Required
• Specification: 3000-9000mm
• Trademark: meide
• Origin: Shandong, China
• HS Code: 7215500000
• Production Capacity: 1000 Ton/Month

Product Description

About products

The grades 08, 10, 15, 20 and 25 of high-quality carbon structural steel belong to low carbon steel, which has good plasticity and is easy to draw, press, extrude, forge and weld. Among them, 20 steel is the most widely used, which is often used to manufacture screws, nuts, washers, small shafts, stamping parts, weldments, and sometimes carburized parts. 30, 35, 40, 45, 50, 55 and other grades belong to medium carbon steel. Due to the increase of pearlite content in the steel, its strength and hardness are higher than before, and the hardness after quenching can be significantly increased. Among them, 45 steel is the most typical. It has not only high strength and hardness, but also good plasticity and toughness, that is, excellent comprehensive properties. 45 steel is the most widely used in mechanical structures. It is often used to manufacture shafts, lead screws, gears, connecting rods, sleeves, keys, important screws and nuts, etc. The grades of 60, 65, 70 and 75 belong to high carbon steel. After quenching and tempering, they not only improve their strength and hardness, but also have excellent elasticity. They are often used to make small springs, springs, wire ropes, rolls, etc.

chemical composition

 

	C	Si	Mn	P	S	Cu	P	S	Cu
08F 1008 1010 SPHE SPHD	≤0.1	according to requirements	0.3-0.6	≤0.03	≤0.05	≥0.2	≤
10# 1010 CK10 S10C S12C	0.08-0.13		0.3-0.6	≤0.04	≤0.05	≥0.2	0.030	0.030	0.30
15# 1015 S15C S17C CK15	0.13-0.18		0.3-0.6	≤0.04	≤0.05	≥0.2	0.030	0.030	0.30
1020/20#/CK22/C22E/S20C/1.1151/1.0144/	0.18-0.23		0.3-0.6	≤0.03	≤0.05	≤0.2	0.040	0.050	0.20
1025 25# 1.1158 S28C C25	0.22-0.28		0.3-0.6	≤0.04	≤0.05	≥0.2	0.025	0.035	0.30
1030 30# C30 CK30 S30C	0.28-0.34		0.6-0.9	≤0.04	≤0.05	≥0.2	0.030	0.030	0.30
1035 35# C35 CK35 S35C	0.32-0.38		0.6-0.9	≤0.04	≤0.05	≥0.2	0.030	0.030	0.30
1040/S40C/1.1186/C40E/SK40/1.1189/1.1186	0.37-0.44		0.6-0.9	≤0.04	≤0.05	≥0.2	0.035	0.035	0.30
1045 45# S45C S48C C45	0.43-0.5		0.6-0.9	≤0.04	≤0.05	≥0.2	0.030	0.030	0.30
1050 50# S50C S53C C50	0.48-0.55	-	0.6-0.9	≤0.04	≤0.05	≤0.2	0.040	0.040	-
1055 55# C55 CK55 S55C	0.5-0.6	according to requirements	0.6-0.9	≤0.04	≤0.05	≥0.2	0.025	0.035	0.40
1060/60#/1.1221/1.0601/C60E/CK60/S58C	0.55-0.65	according to requirements	0.6-0.9	≤0.04	≤0.05	≥0.2	0.025	0.025	0.25

Product Description

Commodity	Cold Drawing / Drawn Flat/ Square / Rectangular / Rectangle / Hexagonal / Special Shape Rods Bars
Grades	Carbon steel	SAE 1018 , A36, SS400, S235JR, Q235, SAE 1020, S20C , 1.0402, 20GB, CK22,  SAE 1045 ,S45C, C45, CK45, EN8 ,1.1191
	Alloy steel	SAE 5120 , 20Cr, Scr 420H, 20Cr4, SAE 5140 , 40Cr,SCr440, 520M40,  SAE 4130 , 30CrMo, SCM430, SCM420, SAE 4140 , 42CrMo4, EN19, SCM440,  708A42, 708M40, SAE 4340, 40CrNiMoA,871M40 , SNCM439
Specification	Round Bar	5mm to 100mm
	Square bar	5*5mm to 120*120mm
	Flat bar	5*20mm to 20*100mm
	hex bar	5mm to 120mm
	hexagonal bar	5mm to 120mm (side to side)
Length	4-12m random length or as per request fixed length
Surface	Bright, or dark as per required
Packing	Wrapped by plastic clothes and steel strips
Delivery Condition	BK, BKW, GBK, NBK
Container Size	20ft GP:5898mm(Length)x2352mm(Width)x2393mm(High) 40ft GP:12032mm(Length)x2352mm(Width)x2393mm(High) 40ft HC:12032mm(Length)x2352mm(Width)x2698mm(High)
Application	hardware tools, auto parts, standard parts, fasteners common shaft, machinery manufacturing, light industry, hardware, bicycles, cars, motorcycles, textile machinery, transformers and other machinery industry.
Advantages	greater size accuracy, straightness and increased tensile and yield strength as well as improved machinability
MOQ	1 tons

 

Approximate comparison table

 

Theoretical weight table of square steel
Side length (mm)	Cross sectional area (cm2)	Theoretical weight (kg/m)	Side length (mm)	Cross sectional area (cm2)	Theoretical weight (kg/m)
5mm	0.25	0.196	30mm	9.00	7.06
6mm	0.36	0.283	32mm	10.24	8.04
7mm	0.49	0.385	34mm	11.56	9.07
8mm	0.64	0.502	36mm	12.96	10.17
9mm	0.81	0.636	38mm	14.44	11.24
10mm	1.00	0.785	40mm	16.00	12.56
11mm	1.21	0.95	42mm	17.64	13.85
12mm	1.44	1.13	45mm	20.25	15.90
13mm	1.69	1.33	48mm	23.04	18.09
14mm	1.96	1.54	50mm	25.00	19.63
15mm	2.25	1.77	53mm	28.09	22.05
16mm	2.56	2.01	56mm	31.36	24.61
17mm	2.89	2.27	60mm	36.00	28.26
18mm	3.24	2.54	63mm	39.69	31.16
19mm	3.61	2.82	65mm	42.25	33.17
20mm	4.00	3.14	70mm	49.00	38.49
21mm	4.41	3.46	75mm	56.25	44.16
22mm	4.84	3.80	80mm	64.00	50.24
24mm	5.76	4.52	85mm	72.25	56.72
25mm	6.25	4.91	90mm	81.00	63.59
26mm	6.76	5.30	95mm	90.25	70.85
28mm	7.84	6.15	100mm	100.00	78.50

mechanical behavior

condition	Heat treatment or condition	tensile strength σb  Mpa	Reduction of area ψ  %
Hot rolled bar and wire	Spheroidizing annealing (GKZ) or spheroidizing annealing (GKZ)+peeling (SH)	≤460	≥65
Pulling products	Cold drawing (K)+spheroidizing annealing (GKZ)	≤460	≥65
Pulling products	Cold drawing (K)+spheroidizing annealing (GKZ)+finishing (K)	≤490	≥65

 

 

Packaging	1. by bundles, each bundle weight under 3 tons, for small outer diameter steel bars, each bundle with 4 - 8 steel strips. 2. after making by bundle, covered with Polyethylene waterproof cloth. 3. make black paints painting on each bar, then make bundles
20 feet container contains dimension	Length under 6000mm
40 feet container contains dimension	Length under 12000mm
By bulk vessel	Freight charge is low by bulk cargo, and large heavy sizes can not be loaded into containers can shipping by bulk cargo

 

 

 

 

FAQ

1. Who are we?

Our headquarter is located in Shandong, China. Since 2022, we have sold to North America (60.00%), Western Europe (14.00%) and South America (6.00%). There are about 11-50 people in our office.

2. How do we guarantee quality?
Always provide pre-production samples before mass production;
Always carry out final inspection before shipment;

3. What can you buy from us?
Copper, aluminum, die steel, titanium, customized machine parts
4. Why should you buy from us instead of other suppliers?
The company has 25 years of production experience. It has advanced precision production equipment, modern large warehouse, 200000 tons of inventory goods and a number of long-term stable cooperative customers.

5. What services can we provide?
Accepted delivery conditions: FOB, CFR, CIF, EXW
Accepted payment currency: US dollar, Euro, Japanese yen, Canadian dollar, Australian dollar, Hong Kong dollar, British pound, RMB, Swiss franc;
Accepted payment type: T/T, L/C, D/P D/A, PayPal;
Optional ports: Tianjin, Shanghai, Guangzhou;
Spoken: English, Chinese

6. How can we get your price?
A. We need the following information to quote for you:
1).  Product Name
2).  standard
3).  Material grade (chemical composition)
4).  dimension
5).  amount
6).  Special part drawin