alloy steel bars 42CrMo from China manufacturer - Henan Jianhui Construction Machinery CO.,LTD

Price:	1000.0~2000.0 USD
Payment Terms:	T/T,L/C,WU
Place of Origin:	Henan, China (Mainland)


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Product Detail

Model No.: 42CrMo

Production Capacity: 2000 Ton/Tons per Month

Delivery Date: 20-30 days

Technique:: Forged

type: Alloy Steel Bar

application: Die Steel Bar

Alloy Or Not:: Is Alloy

material:: alloy constructional steel ...

Means of Transport: Ocean

Packing: According to the customer r...

Standard:: ASTM

Steel Grade: 42CrMo

Place of Origin:: Henan, China (Mainland)

Special Use:: Cold Heading Steel

Shape: Bar

Diameter of alloy steel bar 42CrMo
Length:3-12M
Shape: Round Bar,block
Technology:EAF+LF+VD
Brand: jh
Certificate: BV & ISO

Comparable steel grade

AISI	GB	DIN	JIS
4140	42CrMo	1.7225	SMC440

Chemical composition (%)

Element	Content (%)
Iron, Fe	96.785 - 97.77
Chromium, Cr	0.80 - 1.10
Manganese, Mn	0.75 - 1.0
Carbon, C	0.380 - 0.430
Silicon, Si	0.15 - 0.30
Molybdenum, Mo	0.15 - 0.25
Sulfur, S	0.040
Phosphorous, P	0.035

Mechanical Properties

Properties	Metric	Imperial
Tensile strength	655 MPa	95000 psi
Yield strength	415 MPa	60200 psi
Bulk modulus (typical for steel)	140 GPa	20300 ksi
Shear modulus (typical for steel)	80 GPa	11600 ksi
Elastic modulus	190-210 GPa	27557-30458 ksi
Poisson's ratio	0.27-0.30	0.27-0.30
Elongation at break (in 50 mm)	25.70%	25.70%
Hardness, Brinell	197	197
Hardness, Knoop (converted from Brinell hardness)	219	219
Hardness, Rockwell B (converted from Brinell hardness)	92	92
Hardness, Rockwell C (converted from Brinell hardness. Value below normal HRC range, for comparison purposes only)	13	13
Hardness, Vickers (converted from Brinell hardness)	207	207
Machinability (based on AISI 1212 as 100 machinability)	65	65

Thermal Treatments.

Annealing: 1550F (840C), hold 2 hours, slow cool 50F(30C)/hr. max. to 1200F (650C), then air or furnace cool. Hardness

BHN 185/200.

Stress Relieving:

Annealed Material: 1100-1300F (595-740C), hold 2 hrs, air cool.

Hardened Material: 50-100F (30-55C) below last tempering temperature, hold 2 hrs, air cool.

Straightening: Best done warm 400-800F (205-425C)

alloy steel bar 42CrMo Hardening: (Atmosphere or Vacuum Furnace)

alloy steel bar 42CrMo Preheat: 1250-1300F (675-705C), equalize

alloy steel bar 42CrMo High Heat: 1550-1600F (840-870C), soak 10 to 30 minutes. For vacuum hardening, use the high side of the high heat

range and soak times.

Quench: Oil quench to hand warm, 150F (650C). Temper immediately. Water quenching from 1550F (840C) may be

used for simple shapes and larger sections. Note vacuum furnaces must have oil quench capability to achieve

comparable results.

Temper: Tempering at 400-1200F (205-650C) for 1 hour per inch (25mm) of thickness at temperature is recommended

(2 hrs min). Air cool to room temperature.

Welding

Medium carbon steel filler material.

Annealed Material:
alloy steel bar 42CrMo Preheat: 400F (205C)
Post heat: 500-600F (260-315C)

Hardened Material:
alloy steel bar 42CrMo Preheat: 50F (30C) less than last tempering temperature.
alloy steel bar 42CrMo Postheat: 50F (30C) less than last tempering temperature.

Production Equipment
alloy steel bar 42CrMo