High Quality Square Steel Bar Carbon Steel Bar 4140 4142 Scm440 42CrMo 42CrMo4 1.7225 Steel Hexagonal Bar/Flat Steel Rod

• Type: Square Steel, Flat Steel, Hexagonal Steel4
• Standard: AISI, ASTM, DIN, JIS, GB, BS
• Composition: Alloy Steel
• Technique: Hot Rolled
• Shape: Bar
• Surface Treatment: Blace/Polishing/Oiling or Galvanizing/ etc
• Model NO.: 4140 4142 SCM440 42CrMo 42CrMo4 1.7225
• Special Use: High-strength Steel Plate, Wear Resistant Steel, Silicon Steel, Cold Heading Steel, Free Cutting Steel, Mold Steel
• Application: Wear-Resistant Steel, Cold Heading Steel, Free-Cut
• 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

35Cr, alloy structural steel, and 30Cr steel belong to medium carbon alloy quenched and tempered steel with high strength and toughness. The strength limit is 20% higher than the corresponding grade of 35 steel, and the hardenability is slightly higher than 30Cr. Other process properties are similar to those of 30Cr.

chemical composition

 

Material	C	Si	Mn	P	S	Cr	Ni	Cu	Mo
ASTM 5115	0.18	0.37	0.7	0.035	0.035	1	0.3	0.3	0.15
ASTM 5120	0.24	0.37	0.8	0.035	0.035	1	0.3	0.3	0.15
ASTM 5130	0.34	0.37	0.8	0.035	0.035	1.1	0.3	0.3	0.15
ASTM 5140	0.44	0.37	0.8	0.035	0.035	1.1	0.3	0.3	0.15
ASTM 5145	0.49	0.37	0.8	0.035	0.035	1.1	0.3	0.3	0.15
ASTM 4119	0.15	0.37	0.7	0.035	0.035	0.7	0.3	0.3	0.55
ASTM 4130	0.34	0.37	0.7	0.035	0.035	1.1	0.3	0.3	0.25
ASTM 1335	0.38	0.35	1.9	0.035	0.04	0.2	0.25	0.35	0.06
ASTM 4317	0.4	0.37	0.7	0.035	0.035	1.1	0.3	0.3	0.25
ASTM 4140	0.45	0.37	0.8	0.035	0.035	1.2	0.3	0.3	0.25
GB38CrMoAI/JIS SCM645	0.42	0.45	0.6	0.035	0.035	1.65	0.3	0.3	0.25
ASTM 6150	0.54	0.37	0.8	0.025	0.025	1.1	0.3	0.25	0.1
ASTM 4142	0.45	0.37	1.2	0.035	0.035	1.2	0.3	0.3	0.3

Approximate comparison table

GB

ISC

CNS

JIS

KS

ASTM/AISI

UNS

ISO

DIN EN/DIN

W-Nr.

NF EN/NF

EN

Digital brand

SS14

BS EN/BS

42CrMo

A30422

SCM440

SCM440  SCM440H

SCM440

4140

G41400

42CrMo4

42CrMo4

1.7225

42CD4

42CrMo4

1.7225

2244

708M40

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

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

 

Material	Diameter of sample d mm	Heat treatment or condition.	Tensile strength σb  Mpa	Point of yield σs  Mpa	Ratio of elongation δ  %	Reduction of section ψ  %	hardness  HBW	Shock absorption energy KV2  J
ASTM 5115 45Cr	d=15	Quenching + tempering	≥735	≥490	≥11	≥45	≤179	≥55
ASTM 5120 20Cr	d=15	Quenching + tempering	≥835	≥540	≥10	≥40	≤179	≥47
ASTM 5130 30Cr	d=25	Quenching + tempering	≥885	≥685	≥11	≥45	≤187	≥47
ASTM 5135 35Cr	d=25	Quenching + tempering	≥930	≥735	≥11	≥45	≤207	≥47
ASTM 5140 40Cr	d=25	Quenching + tempering	≥980	≥785	≥9	≥45	≤207	≥47
ASTM 5145 45Cr	d=25	Quenching + tempering	≥1030	≥835	≥9	≥40	≤217	≥39
ASTM  4119	d=30	Quenching + tempering	≥410	≥265	≥24	≥60	≤179	≥110
ASTM 4130	d=25	Quenching + tempering	≥930	≥785	≥12	≥50	≤229	≥63
ASTM 4317	d=25	Quenching + tempering	≥980	≥835	≥12	≥45	≤229	≥63
ASTM 4140	d=25	Quenching + tempering	≥1080	≥930	≥12	≥45	≤217	≥63
GB38CrMoAI/ JIS SCM645	d=30	Quenching + tempering	≥980	≥835	≥14	≥50	≤229	≥50
ASTM 6150	d=25	Quenching + tempering	≥1280	≥1130	≥10	≥40	≤255	d=25
ASTM 4142	d=25	Quenching + tempering	≥980	≥785	≥10	≥45	≤217	≥63

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