AISI 4140 / DIN 42CrMo4 / En19 Q&T Heat Treated Alloy Steel Round Bar

• Type: Alloy Steel Bar
• Standard: AISI, ASTM, GB, JIS, DIN, BS
• Technique: Quenched and Tempered
• Alloy: Alloy
• Commodity: Hardened and Tempered Steel Round Bar
• Grade: 42CrMo4 En10083
• Model NO.: AISI 4140 / DIN 42CRMO4 / EN19
• Techniques: Quenched and Tempered
• MOQ: 2tons
• 42CrMo4: Qt Steel Bar
• Transport Package: Standard Export Packing
• Specification: 10-300mm
• Origin: China
• Production Capacity: 3000tons/Month

Product Description

AISI 4140 / DIN 42CRMO4 / EN19 Q&T Heat Treated Alloy Steel Round bar

1.Equivalent Steel Grade to 42CrMo4

QUALITY	EUROPE	GERMANY		FRANCE	SPAIN	G.B.	USA
	EN	DIN	W.n.	AFNOR	UNE	B.S.	AISI/SAE
42CrMo4	42CrMo4	42CrMo4	17,225	42CD4	F1252	708M40	4140

2.42CrMo4 Steel Chemical composition

42CrMo4/1.7225	C	Mn	Si	P	S	Cr	Mo
	0.38-0.45	0.60-0.90	0.40 max	0.035 max	0.035 max	0.90-1.20	0.15-0.30

3.Mechanical property of 42CrMo4 according to EN10083-3

42CrMo4 1.7225		d ≤ 16mm
		Re min	Rm	A min	Z min	KVb min
		N/mm2		%	%	J
		900	1100 - 1300	10	40	-
		16mm < d ≤ 40mm
		Re min	Rm	A min	Z min	KVb min
		N/mm2		%	%	J
		750	1000-1200	11	45	35
		40mm < d ≤ 100mm
		Re min	Rm	A min	Z min	KVb min
		N/mm2		%	%	J
		650	900 -1100	12	50	35
		100mm < d ≤ 160mm
		Re min	Rm	A min	Z min	KVb min
		N/mm2		%	%	J
		550	800 -950	13	50	35
		160mm < d ≤ 250mm
		Re min	Rm	A min	Z min	KVb min
		N/mm2		%	%	J
		500	750-900	14	55	35

 

4.Heat Treatment of 42CrMo4 Steels

Annealing of 42CrMo4 Steels

• Heat steel 42CrMo4 forged steel slowly and thoroughly to 800-850°C;
• Cool slowly in the furnace to the temperature 480°;
• Complete annealing the steel in the air.

RFQ OF 42CRMO4 STEEL

Quenched and Tempered (Q+T)

• Heat 42CrMo4 steel slowly to 880°C;
• Soak at this temperature then quench in oil;
• Temper as soon as 42CrMo4 steel reach room temperature (20°C);
• Heat uniformly to the suitable temperature of 560°C;
• Withdraw the 42CrMo4 material from the furnace and cool in the air.

5.Application of 42CrMo4 Alloy Steels

42CrMo4 alloy steel is widely used for engineering steel purpose, such as: making various kinds of machinery, automobile, mining spare part, the gearwheel of the engine, the driving gear of supercharger, the connecting rob, the pinchock under the high pressure, parts for power train applications, cold formed fastener components, shafts, gears, drill collars for the oil exploration, etc.

6.Quality control:
1. Melting Process: EAF+LF+VD
2. Both ends cut by saw
3. Ratio of forging:minimum 3:1
4. Grain size of final product: according to ASTM E112 more than 5,preferred more than 8
5. Ultrasonic test: As per SEP1921 Class C/c or D/d

7.MOQ: 2tons

8.Payment term: FOB CIF CFR EXW and so on

9.Delivery time : 7 to 30 days after deposit received.












AISI 4140 / DIN 42CRMO4 / EN19 Q&T Heat Treated Alloy Steel Round bar
AISI 4140 / DIN 42CRMO4 / EN19 Q&T Heat Treated Alloy Steel Round bar
AISI 4140 / DIN 42CRMO4 / EN19 Q&T Heat Treated Alloy Steel Round bar